With Current Sensor Patents (Class 323/277)
  • Patent number: 10802053
    Abstract: This disclosure is directed to techniques that may accurately determine the amount of current flowing through a power switch circuit by measuring the voltage across the inherent impedance of the circuit connections. One connection may include a low impedance connection between the power switch output and ground, where the low impedance connection may be on the order of milliohms. By using a four-wire measurement, the sensing connections are not in the current path, so the measured value may not be affected by the current. The connection that makes up the current path can be accomplished with a variety of conductive materials. Conductive materials may have a temperature coefficient of resistivity that may impact a measurement of electric current as the temperature changes. Measuring the temperature of the current path, along with the voltage across the connection, may allow a more accurate current measurement.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: October 13, 2020
    Assignee: Infineon Technologies AG
    Inventors: Rainald Sander, Stephan Leisenheimer, Stefan Mieslinger
  • Patent number: 10794949
    Abstract: A power supply device for a test equipment, test equipment having a power supply device and a method for operating a power supply device are described. The power supply device is configured for an at least partly capacitive load and has an output voltage provider configured to generate a target voltage, which is energized by an input supply voltage provided at an input of the power supply, wherein the target voltage generates an output supply voltage at the capacitive load, when the capacitive load is connected to an output of the power supply and a supply current monitor configured to monitor supply current flowing into the input of the power supply and to temporarily reduce the target voltage generating the output supply voltage, if a current value of the supply current exceeds a first predetermined threshold.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: October 6, 2020
    Assignee: ADVANTEST CORPORATION
    Inventor: Heinz Nuessle
  • Patent number: 10784829
    Abstract: A circuit includes a power transistor including a first control input and first and second current terminals, the second current terminal to be coupled to a load to provide current to the load. A second transistor includes a second control input and third and fourth current terminals, and the first and second control inputs connected together and the first and third current terminals connected together. A third transistor includes a third control input and fifth and sixth current terminals. A fourth transistor includes a fourth control input and seventh and eighth current terminals, and the seventh current terminal is coupled to the fourth and fifth current terminals. An amplifier amplifies a difference between voltages on the second and fourth current terminals. An output of the amplifier is coupled to the third control input and a diode device is connected between the third and fourth control inputs.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: September 22, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Dattatreya Baragur Suryanarayana, Kushal D Murthy
  • Patent number: 10775821
    Abstract: A regulator includes: a first transistor connected between an input terminal and an output terminal; a feedback circuit configured to control a control voltage of a control electrode of the first transistor such that a voltage of the output terminal approaches a target voltage according to a feedback voltage proportional to the voltage of the output terminal; a second transistor having one end connected to the input terminal and a control electrode to which the control voltage is applied in common with the first transistor; and a clamp circuit configured to set the other end of the second transistor to a voltage determined by the voltage of the output terminal.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: September 15, 2020
    Assignee: Rohm Co., Ltd.
    Inventor: Makoto Yasusaka
  • Patent number: 10692854
    Abstract: A semiconductor device is protected from electrical overstress (EOS) and electro-static discharge (ESD) events by a series protection circuit electrically coupled in series along the transmission line between a signal source and a load. The series protection circuit includes a first field-effect transistor (FET) electrically coupled in series between the signal source and load. A parallel protection circuit is electrically coupled between the transmission line and a ground node. The parallel protection circuit can include a transient-voltage-suppression (TVS) diode.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: June 23, 2020
    Assignee: Semtech Corporation
    Inventors: David J. Rose, William A. Russell, Jonathan Clark
  • Patent number: 10673400
    Abstract: Biasing circuitry for RF and microwave integrated circuits keeps the quiescent current of a power amplifier integrated circuit constant when operated with a time-varying DC supply voltage. A dynamic gate bias circuit includes an on-chip sense transistor and control circuitry to keep current of the sense transistor substantially constant by varying sense transistor bias voltage to compensate for variation in the time-varying supply voltage signal. The varying bias voltage is then applied to the amplifying transistors of the power amplifier, resulting in their quiescent current being substantially independent of the time-varying supply voltage.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: June 2, 2020
    Assignee: The Regents of the University of Colorado, a body
    Inventors: Gregor Lasser, Zorana Popovic
  • Patent number: 10644592
    Abstract: Systems, apparatuses, and methods for efficiently generating a stable output for a transient load for one or more components are described. In various embodiments, a power converter includes two feedback loops to separate the stability and the equivalent output resistance, which allows the bandwidth to increase. The first loop includes a compensator receiving an output current of an amplifier. Additionally, a first converter and a first current mirror generate a target current based on the output current of the amplifier. Based on the target current, multiple step-down converters generate an output voltage, which is returned to the amplifier through a resistor. The second loop includes a second converter with a first order series RC filter to reduce the second loop's response time. A second current mirror receives current from the second converter and generates a dynamically adapting feedback current, which flows through the resistor in the first loop.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: May 5, 2020
    Assignee: Apple Inc.
    Inventors: Fabio Ongaro, Michael Couleur
  • Patent number: 10579082
    Abstract: An apparatus includes a power transistor to conduct a load current from a supply voltage node to an output node and a current sense circuit coupled to the power transistor. The current sense circuit generates a current sense current proportional to the load current. A temperature sense circuit is included to generate a temperature sense voltage proportional to the temperature of the power FET. A thermal limit circuit is coupled to the temperature sense circuit. A current limit circuit is coupled to the current sense circuit and to the thermal limit circuit. The current limit circuit generates a control signal on a current limit circuit output node. The control signal is responsive to the current sense current and to a first current from the thermal limit circuit. The current limit circuit output node is coupled to a control input of the power transistor.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: March 3, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Aalok Dyuti Saha, Bhaskar Ramachandran, Dattatreya Baragur Suryanarayana
  • Patent number: 10571941
    Abstract: A voltage regulator includes an error amplifier which receives a feedback voltage and a reference voltage and thereby controls a gate voltage of an output transistor, a non-regulation detection circuit having a differential amplifier circuit operating on a current corresponding to an output current of the output transistor, and an overshoot suppression circuit having an overshoot detection circuit which enables an overshoot detection by a signal indicating the detection of non-regulation state from the non-regulation detection circuit.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: February 25, 2020
    Assignee: ABLIC INC.
    Inventor: Kaoru Sakaguchi
  • Patent number: 10551417
    Abstract: An inductor current measurement probe apparatus and system are described herein. In an embodiment, a system comprises a probe interconnect including a first connector that couples to a positive terminal of the inductor and a second connector that couples to a negative terminal of the inductor. The system further comprises an RC filter that is coupled to the probe interconnect and that includes at least one resistor and at least one capacitor in an arrangement that converts a voltage of the inductor to a differential capacitor voltage. The system further comprises a differential active probe input circuitry including a positive terminal and a negative terminal that are coupled to the RC filter and arranged to convert the differential capacitor voltage to a single-ended capacitor voltage. In other embodiments, the RC filter may be coupled directly to the inductor. The system may further convert the capacitor voltage to inductor current.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: February 4, 2020
    Assignee: Oracle International Corporation
    Inventors: Istvan Novak, Peter J. Pupalaikis, Lawrence W. Jacobs
  • Patent number: 10534390
    Abstract: A series regulator includes, for example, first and second operational amplifiers, for driving a first transistor for a heavy load and a second transistor for a light load respectively, and an amplifier control circuit. The amplifier control circuit controls the first and second operational amplifiers such that, in a light load region, a first output current passing through the first transistor has a zero value and a second output current passing through the second transistor covers the entire output current passing through a load, and such that, in a heavy load region, the second output current has a zero value (or a fixed value lower than an amplifier switching threshold value) and the first output current covers the entire output current (or a difference left by subtracting the second output current from the output current).
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: January 14, 2020
    Assignee: Rohm Co., Ltd.
    Inventor: Makoto Yasusaka
  • Patent number: 10498244
    Abstract: A controller for use in a power converter of a motor drive includes a control circuit configured to turn ON a high side switch by sinking a current of an ON signal. A high side signal interface circuit is coupled to receive the ON signal to generate a drive signal to control switching of the high side switch in a presence of a common mode signal caused by slewing at a half bridge node. The high side signal interface circuit includes a common mode cancellation circuit coupled to provide a common rejection signal to provide a cancellation or rejection of the common mode signal. A first current hysteresis comparator is coupled to receive a common mode rejection signal, a first current signal, and a fourth current signal, and generate a first output signal in a presence of a common mode voltage.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: December 3, 2019
    Assignee: Power Integrations, Inc.
    Inventors: Hartley Fred Horwitz, Steven Greig Porter
  • Patent number: 10468967
    Abstract: The present invention relates to a device (1) for estimating an average value of an inductor current for switched-mode power converters (100), the device (1) comprising: a sensor (10), which is configured to measure an inductor voltage (v_L) and an inductor current (i_L); a ripple-suppressor (20), which is configured to provide an estimated inductor current ripple (EIR) based on the measured inductor voltage (v_L); and a current-corrector (30), which is configured to provide a corrected inductor current (i_Lc) based on the estimated inductor current ripple (EIR) and the measured inductor current (i_L).
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: November 5, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Albert Garcia Tormo, Hendrik Huisman, Peter Luerkens, Bernd Ackermann
  • Patent number: 10305381
    Abstract: A device includes a digital switch regulator to supply an output voltage and a first current to a load based on a reference voltage. The device also includes an analog circuit to supply a second current to the load in addition to the first current based on a duty cycle of the digital switch regulator.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: May 28, 2019
    Assignee: Micron Technology, Inc.
    Inventor: Feng Pan
  • Patent number: 10305364
    Abstract: A power conversion system includes: a plurality of power modules connected in parallel to each other; a plurality of drive circuits driving the plurality of power modules based on input signals respectively; a plurality of correction sections correcting the input signals inputted to the plurality of drive circuits based on a plurality of correction values respectively; a temperature detection section detecting operating temperatures of the plurality of power modules; and a calculation section estimating current switching characteristics of the plurality of power modules based on the measured operating temperatures and temperature dependency of switching characteristics of the plurality of power modules, and calculating the plurality of correction values based on the estimated current switching characteristics so as to reduce variations of currents flowing through the plurality of power modules.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: May 28, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventor: Akiko Goto
  • Patent number: 10298426
    Abstract: There is disclosed a communication cable module including: a conductive cable; a linear amplifier connected to the conductive cable; a detector for detecting presence or absence of an input signal of the conductive cable; a first circuit having a variable-current function; and a second circuit having a common-mode voltage regulating function, wherein when the input signal is not present, the variable-current function of the first circuit reduces an output current of the linear amplifier and the common-mode voltage regulating function of the second circuit regulates an output common-mode voltage of the linear amplifier.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: May 21, 2019
    Assignee: Hitachi Metals, Ltd.
    Inventors: Koji Maeda, Izumi Fukasaku, Masaru Kokubo
  • Patent number: 10256805
    Abstract: Embodiments of the present disclosure provide a protective circuit to be used in a digital output module, the digital output module comprises a first voltage source and at least an output terminal. The protective circuit comprises: a first sampling unit for sampling a first voltage relevant to the output current from the first voltage source, a first comparing unit for comparing the sampled first voltage with a first reference voltage, a control unit for generating a current regulating signal based on a result from the first comparing unit, and a current regulating unit for regulating the output current from the first voltage source based on the current regulating signal. This protective circuit provides overflowing and short circuit protection, and is cheap in cost.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: April 9, 2019
    Assignee: ABB Schweiz AG
    Inventors: Wei Liu, Huan Shi, Axel Lohbeck
  • Patent number: 10234882
    Abstract: An electrical function group with a control device and a first voltage regulator, the control device having a supply voltage input, the first voltage regulator having a first supply voltage input and a first supply voltage output and being designed for connection to a supply voltage source via the first supply voltage input and to supply the control device via the first supply voltage output, the first supply voltage output and the supply voltage input being connected together. A second voltage regulator is also provided having a second supply voltage input and a second supply voltage output, the second voltage regulator being designed to be connected to the supply voltage source via the second supply voltage input and to supply the first voltage regulator and the control device via the second supply voltage output, the second supply voltage output and the first supply voltage input being connected to one another.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: March 19, 2019
    Assignee: KROHNE MESSTECHNIK GMBH
    Inventor: Wilhelm Florin
  • Patent number: 10236842
    Abstract: A circuit includes an amplifier having a first power terminal configured to be coupled to a supply voltage and a second power terminal configured to be coupled to a reference potential. The circuit further includes a first impedance element coupled between a first input terminal of the amplifier and a first output terminal of the amplifier. The circuit additionally includes a second impedance element coupled between the first input terminal and the reference potential. The amplifier is configured to output a first voltage at a second output terminal of the amplifier in response to the supply voltage being greater than an output voltage at the first output terminal of the amplifier. The amplifier is further configured to output a second voltage at the second output terminal of the amplifier in response to the supply voltage being less than the output voltage at the first output terminal of the amplifier.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: March 19, 2019
    Assignees: STMICROELECTRONICS (ALPS) SAS, STMICROELECTRONICS (GRENOBLE 2) SAS
    Inventors: Vratislav Michal, Michel Ayraud
  • Patent number: 10216208
    Abstract: A voltage regulator having current sense capability may include an input node and an output node. A first output device may be electrically connected between the input node and the output node, and configured to control current flow through the first output device to regulate a voltage at the output node. A current sense circuit may be configured to produce a signal that is indicative of the current through the first output device. The current sense circuit may be configured to perform a first kind of offset compensation operation to reduce an offset voltage in an error amplifier of the current sense circuit, and to perform a second kind of offset compensation operation to reduce the offset voltage in the error amplifier.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: February 26, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Vincenzo Peluso, Hua Guan
  • Patent number: 10191021
    Abstract: A detector measures turn-off voltage change with respect to change in time between a collector and emitter of a transistor and peak voltage of the transistor at the collector. An electronic data processor determines intermediate parameters of turn-off current, the turn-on current and on-state voltage drop based on the turn-off voltage change and the peak voltage. The data processor determines the power or energy loss for one switching cycle of the transistor based on the turn-off current, the turn-on current and on-state voltage drop between the collector and emitter of the transistor. The data processor estimates an associated average die temperature for the transistor over the switching cycle.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: January 29, 2019
    Assignee: DEERE & COMPANY
    Inventor: Brij N. Singh
  • Patent number: 10153696
    Abstract: Circuitry and methods for sampling a signal are disclosed. An example of the circuitry includes a node for coupling the circuitry to the signal being sampled and a plurality of capacitors, wherein each capacitor is selectively coupled to the node by a switch. An analog-to-digital converter is coupled to the node and is for measuring the voltages of individual ones of the plurality of capacitors and converting the voltages to digital signals. Delay circuitry is coupled to each of the switches, the delay circuitry is for closing one switch at a time for a predetermined period.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: December 11, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Olivier Trescases, Johan Tjeerd Strydom, Rajarshi Mukhopadhyay
  • Patent number: 10056835
    Abstract: In one form, a circuit having a current sense element includes a current sense element, a target signal generator, and an error signal generator. The current sense element has first and second terminals and is adapted to be coupled in a current path whose current is to be sensed. The target signal generator generates a target signal representative of a condition of the current sense element when the current sense element conducts a target current. The error signal generator has an output for providing an error signal in response to both a current flowing through the current sense element and the target signal. In another form, a current regulated circuit includes a current conducting element such as a solenoid and a current control element coupled in series with the current conducting element and the current sense element.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: August 21, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Jean-Paul Eggermont
  • Patent number: 10007287
    Abstract: A voltage generation circuit may include: a current providing block configured to provide, to an output node, a current corresponding to a voltage level of a set voltage, and a voltage level control block configured to adjust the resistance value thereof in response to a voltage control signal, wherein the voltage level control block is coupled between the output node and a ground terminal, and wherein the voltage level control block comprises a first current path unit and a second current path unit having different temperature characteristics.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: June 26, 2018
    Assignee: SK hynix Inc.
    Inventor: Hyun Chul Lee
  • Patent number: 9973085
    Abstract: A method and apparatus for controlling a converter are provided. In the method and apparatus, a converter is operated in accordance with a duty cycle and based on a difference between a feedback signal representing an output voltage of the converter and a reference signal. An overcurrent condition is detected in the converter. In response to detecting the overcurrent condition, the duty cycle used to operate the converter is limited and the reference signal is made to track the feedback signal to mitigate an output voltage overshoot at an end of the overcurrent condition.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: May 15, 2018
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Jeanpierre Vicquery, Emilio Volpi
  • Patent number: 9971370
    Abstract: A voltage regulator including a voltage amplifier, a first output-stage, an AC-pass filter, a current amplifier, a second output-stage and a gain circuit is provided. Output terminals of the first and the second output-stages jointly provide the output voltage of the voltage regulator. Two input terminals of the voltage amplifier respectively receive a reference voltage and the output voltage. An input terminal of the first output-stage is coupled to an output terminal of the voltage amplifier. Two input terminals of the current amplifier respectively receive a reference current and the AC component of the output voltage. An input terminal of the second output-stage is coupled to an output terminal of the current amplifier. An input terminal of the gain circuit is coupled to the output terminal of the voltage amplifier. An output terminal of the gain circuit is coupled to the input terminal of the second output-stage.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: May 15, 2018
    Assignee: Novatek Microelectronics Corp.
    Inventors: Min-Hung Hu, Chiu-Huang Huang, Chen-Tsung Wu, Juin-Wei Huang, Pin-Han Su
  • Patent number: 9960762
    Abstract: Disclosed is a startup circuit comprises a current path comprising a circuit including a P-channel MOS transistor, a P-channel MOS transistor, and an N-channel MOS transistor connected in series. After a constant current circuit is started, the N-channel MOS transistor is turned on, an operating current is fed through the current path, and an N-channel MOS transistor is turned off to cut off a startup current. After the startup current is cut off, the gate voltage of the P-channel MOS transistor is controlled by the voltage (bias voltage during operation of the constant current circuit) of a node, a drain-source voltage of the P-channel MOS transistor is reduced, and the operating current flowing through the current path is limited.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: May 1, 2018
    Assignee: Azbil Corporation
    Inventor: Tetsuya Kajita
  • Patent number: 9958889
    Abstract: The present disclosure relates to a voltage regulation circuit including a first transistor connected between an input of voltage to be regulated and an output of a regulated voltage. A first regulation loop controls the first transistor according to a difference between a reference voltage and a first feedback voltage derived from the regulated voltage. A second transistor is connected in series between the first transistor and the output. A second regulation loop controls the second transistor according to a difference between the reference voltage and a second feedback voltage derived from the regulated voltage. The second regulation loop is active in low and high power regulation modes. A switch circuit forces the first transistor into an on state in a low power regulation mode.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: May 1, 2018
    Assignee: STMicroelectronics (Alps) SAS
    Inventor: Alexandre Pons
  • Patent number: 9954392
    Abstract: An energy storage system that includes an uninterruptible power supply configured to supply first power to a load and a battery array comprising a backup battery unit. The system further includes a controller to cut off the first power supplied by the uninterruptible power supply at a first time and control the uninterruptible power supply and the battery array to supply second power to the load using power stored in the battery array. Typically, the second power is supplied when the first power is cut off.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: April 24, 2018
    Assignee: LG CNS CO., LTD.
    Inventors: In Chol Yeon, Bon Jun Koo, Kwan Bok Lee, Kwang Ho Lee, Eun Ki Jeong, Chung Hyun Jung
  • Patent number: 9948183
    Abstract: A synchronous regulator controller, including a synchronous switch that is coupled between a first node and a second node. The controller also includes a first voltage divider that includes a first resistive device that is coupled between the first node and a third node, and a second resistive device that is coupled between the third node and a second node. The controller also includes a comparator having a first input that is coupled to the first node, and a second input that is coupled to a forth node. The controller also includes a current source that is arranged to provide a current to the fourth node. The controller also includes a third resistive device that is coupled between the third node and the fourth node.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: April 17, 2018
    Assignee: Infineon Technologies AG
    Inventors: Daniele Vacca Cavalotto, Enrico Orietti
  • Patent number: 9946282
    Abstract: A voltage regulator includes a feedback regulation loop and a drive transistor configured to source current to a regulated output. A transient recovery circuit is coupled to the voltage regulator circuit and includes a first transistor coupled to source current into a control terminal of the drive transistor, wherein the source current is in addition to current sourced in response to operation of the feedback regulation loop. The first transistor is selectively actuated in response to a drop in voltage at the regulated output. The transient recovery circuit further includes a second transistor coupled to sink current from the regulated output. The sink current has a first non-zero magnitude in the quiescent operating mode of the regulator circuit. In response to an increase in voltage at the regulated output, the operation of the second transistor is modified to increase the sink current to a second, greater, non-zero magnitude.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: April 17, 2018
    Assignee: STMicroelectronics (Shenzhen) R&D Co. Ltd
    Inventor: Yong Feng Liu
  • Patent number: 9904310
    Abstract: A regulator circuit includes a power transistor, a current mirror, a first NMOS transistor, a second NMOS transistor and a current source. The power transistor has a source connected to an external power supply voltage supply, a gate connected to a first node having a first voltage and a drain connected to a second node outputting an internal power supply voltage. A current mirror provides a first current to a third node having a second voltage and provides a first node with a second current. A first NMOS transistor has a drain connected to a first node, a gate receiving a first reference voltage and a source connected to a fourth node. A second NMOS transistor has a drain connected to a third node, a gate connected to a second node and a source connected to the fourth node.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: February 27, 2018
    Assignee: SAMSUNG ELECRONICS CO., LTD.
    Inventors: Jeong-Don Ihm, Siddharth Katare
  • Patent number: 9898020
    Abstract: Particular embodiments include logic that can reduce an voltage output of a regulator to multiple subsystems in response to detecting high power conditions in an electronic device. When the power being monitored goes up, the logic detects the increase in power. Then, the logic can compare the power to a plurality of thresholds. The plurality of thresholds may be set below an absolute limit threshold in which the electronic device may not operate properly if the absolute limit is met. When a first threshold is met, the output voltage of the regulator may be decreased until a minimum voltage level is reached. When a second threshold is met, the output voltage may be increased until a maximum voltage level is reached. The minimum and maximum voltage levels may be based on voltage levels requested from a set of subsystems and also priority levels associated with those subsystems.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: February 20, 2018
    Assignee: QUALCOMM Incorporated
    Inventor: Juha Oikarinen
  • Patent number: 9899912
    Abstract: A charge pump driven Linear Voltage Regulator (LVR) system with a cascoded n-type output pass device includes an error amplifier; a voltage feedback network; a dynamically controlled charge pump block that is ON only when required and OFF otherwise; a gate drive system configured to ensure that the charge pump drives only gate of a cascode transistor and no DC or static current load such that a voltage is preserved for a duration; and a filter at the charge pump output to reduce an impact of the switching noise of the charge pump on the regulator output, wherein the filter is outside a main servo loop of the regulator, wherein an n-type pass element and/or cascode element in the cascoded n-type output pass device comprises at least one of a Metal Oxide Semiconductor (MOS) Field Effect Transistor (FET), a bipolar junction transistor, an LDMOS, or a FinFET device.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: February 20, 2018
    Assignee: Vidatronic, Inc.
    Inventor: Anand Veeravalli Raghupathy
  • Patent number: 9886049
    Abstract: A low drop-out voltage regulator includes an error amplifier having a non-inverting input, an inverting input and an output. One of the non-inverting and inverting inputs is connected to a reference voltage. An output circuit is connected by way of the output of the error amplifier to an external load. The output circuit generates an output current and an output voltage for the external load. A current tracking circuit is coupled to the output circuit and receives the output current and generates a tracking current that tracks the output current. A load tracking-compensation circuit is coupled to the current tracking circuit and the output circuit, and generates a control voltage based on the tracking current and provides the control voltage to the output circuit.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: February 6, 2018
    Assignee: NXP USA, INC.
    Inventors: Jiam Qing, Ming Liang Wan, Shuiwen Huang
  • Patent number: 9874589
    Abstract: An inrush current recording module is installed in a power supply unit. The power supply unit has a front-stage power circuit and a back-stage power circuit. The front-stage power circuit includes a first ground terminal, and the back-stage power circuit includes a second ground terminal. The inrush current recording module includes a series circuit and a detection recording unit. The series circuit is formed by a capacitor and a resistor, and includes two ends thereof respectively connected to the first ground terminal and the second ground terminal. The detection recording unit detects the resistor to generate a voltage signal, compares the voltage signal with a voltage determination level, starts timing an inspection period when the voltage signal is greater than the voltage determination level, and records whether a current inrush current is harmful or harmless according to whether a power output signal is obtained within the inspection period.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: January 23, 2018
    Assignee: ZIPPY TECHNOLOGY CORP.
    Inventors: Tsun-Te Shih, Yu-Yuan Chang, Kuang-Lung Shih, Wen-Lung Li, Heng-Chia Chang
  • Patent number: 9857815
    Abstract: A regulator includes a first operational amplifier configured to receive a reference voltage and a feedback voltage and to output a node voltage based on a difference of the feedback voltage and the reference voltage; a first switch unit configured to receive the node voltage and to supply a recover current based on the node voltage; an output unit configured to output an output voltage and the feedback voltage according to a supply of the recover current; a comparison unit configured to receive the reference voltage and a feedback voltage and to sense a voltage drop of the output voltage; and a second switch unit configured to discharge the first switch unit according to the difference of the reference voltage and the feedback voltage.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: January 2, 2018
    Assignee: SK Hynix Inc.
    Inventor: Herve' Caracciolo
  • Patent number: 9847729
    Abstract: A method of operating a switched mode power supply comprising a switched mode converter and a control arrangement. The switched mode converter converts an input voltage to an output voltage and includes a primary winding, controllable switch based circuitry connecting the input voltage over the primary winding, a secondary winding coupled to the primary winding, and an LC filter including an inductive element and a capacitive element, wherein the output voltage is obtained as the voltage over the capacitive element and a duty cycle of the switched mode converter can be controlled by controlling the switch based circuitry. The switched mode converter is controlled depending on measurements of the input and output voltages in a hybrid regulated ratio control scheme. The power of the switched mode power supply is shut off or a current thereof is limited, when a current of the switched mode power supply reaches a maximum current.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: December 19, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Magnus Karlsson, Jonas Malmberg, Oscar Persson, Fredrik Wahledow
  • Patent number: 9829900
    Abstract: The voltage regulator includes an overheat protection circuit. The overheat protection circuit includes: a temperature sensing circuit; a voltage difference sensing circuit configured to output a current depending on a voltage difference between a power source voltage to be supplied to a power supply terminal and the output voltage; an output current monitoring circuit; a second reference voltage circuit configured to generate a second reference voltage; a comparator circuit configured to compare an output voltage of the temperature sensing circuit and the second reference voltage to each other; and an overheat protection transistor is configured to turn off the output transistor when the result of the comparison indicates an overheated state. The second reference voltage of the second reference voltage circuit is controlled based on an output current of the voltage difference sensing circuit and on an output current of the output current monitoring circuit.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: November 28, 2017
    Assignee: SII SEMICONDUCTOR CORPORATION
    Inventor: Teruo Suzuki
  • Patent number: 9787180
    Abstract: Methods, devices, systems, and integrated circuits are disclosed for switching on an electrical connection to one or more loads. In one example, a switch device includes a voltage source, a power switch circuit block connected to the voltage source, and a current limitation circuit block connected to the voltage source and the power switch circuit block. The switch device further includes a voltage outlet connected to the power switch circuit block. The switch device further includes a current limit feedback circuit connected to the power switch circuit block and the current limitation circuit block. The current limit feedback circuit is configured to enable the switch device to provide a regulated connection between the power switch circuit block and the voltage outlet, wherein the regulated connection defines a current limitation mode, such that the regulated connection reduces the current in the power switch circuit block if the switch device is in the current limitation mode.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: October 10, 2017
    Assignee: Infineon Technologies AG
    Inventors: Robert Illing, Christian Djelassi
  • Patent number: 9755428
    Abstract: An apparatus comprising a steady state sensing circuit, a switching circuit, and a detection circuit. The steady state sensing circuit is connected to a first, a second and a third node. The first node is connected to a first device, the second node is connected to a second device, and the steady state sensing circuit causes a scaled current to flow at the third node. The scaled current is proportional to a voltage difference between the first and second node. The switching circuit limits an amount of current that flows between the first and second device. The detection circuit is connected to the third node and the switching circuit. The detection circuit monitors the scaled current at the third node and controls the switching circuit to limit the amount of the current that flows between the first and second device when the scaled current is greater than a desired level.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: September 5, 2017
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Joseph Brandon Witcher, Michael V. Bredemann
  • Patent number: 9753476
    Abstract: A voltage regulator circuit is provided in which voltage overshoots are quickly dissipated using a discharge path which is connected to an output of the voltage regulator. Circuitry for controlling the discharge path is provided using internal currents of an error amplifier to provide a space-efficient and power-efficient design with a fast response. Moreover, hysteresis can be provided to avoid toggling between discharge and no discharge, and to avoid undershoot when discharging the output. A digital or analog signal is set which turns the discharge transistor on or off. A current pulldown may be arranged in the discharge path.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: September 5, 2017
    Assignee: SanDisk Technologies LLC
    Inventors: Hemant Shukla, Saurabh Kumar Singh
  • Patent number: 9742398
    Abstract: Current sensing through a power semiconductor device with reduced sensitivity to temperature and process variations. An example arrangement includes a power switch coupled between a voltage input and an output voltage terminal supplying current to a load; a first isolation switch coupled between the voltage input and a first node; a comparator amplifier having a pair of differential inputs coupled to the first node and a second node outputting a voltage in response to the difference at the differential inputs; and a first current source coupled between a positive supply voltage and the first node to output a first current responsive to the voltage output from the comparator amplifier; wherein the first current is proportional to the current through the power switch and a ratio of the on resistance of the power switch and the on resistance of the first isolation switch. Methods and additional arrangements are also disclosed.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: August 22, 2017
    Assignee: Texas Instruments Incorporated
    Inventors: Ramesh Chandrasekaran, Cetin Kaya
  • Patent number: 9710000
    Abstract: A bias circuit supplies a bias voltage VBIAS to a microphone. A variable gain amplifier amplifies a reference voltage VREF. A low-pass filter removes a high-frequency component from the output of the variable gain amplifier. A voltage follower amplifier receives the output voltage of the low-pass filter, and supplies the output voltage to the microphone.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: July 18, 2017
    Assignee: ROHM CO., LTD.
    Inventors: Kenta Yamada, Hirotsugu Ego
  • Patent number: 9698715
    Abstract: A method and a system for generating auxiliary power for an islanded wind turbine are described, wherein the wind turbine may comprise a generator configured to provide power to a main grid. The method comprises: detecting an island mode of operation wherein said wind turbine is electrically disconnected from said main grid; in response to said disconnection, adjusting the rotational speed of said wind turbine to a value within a range of low rotational speeds; converting said generator output to a value suitable for charging said auxiliary power distribution system; and, connecting the output of said converter to said auxiliary power distribution system.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: July 4, 2017
    Assignee: XEMC DARWIND B.V.
    Inventor: Florentius Johannes Bodewes
  • Patent number: 9680365
    Abstract: In a typical DC-DC converter, an error amplifier is used to sense and amplify the difference between the feedback voltage and the reference voltage. In the event of current overloading (limit condition), example embodiments of the disclosed systems and methods of over-load protection with voltage fold-back fold back the reference voltage proportional to the current limit. The regulator may continue to regulate in this fold-back voltage reference condition without shutting down the converter, saturating the inductor, or causing a catastrophic failure at the power FETs. The disclosed systems and methods of over-load protection with voltage fold-back resolve consecutive switching cycle current build up in high input voltage DC/DC convertor applications due to the latency of current limit circuitry.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: June 13, 2017
    Assignee: Texas INsturments Incorporated
    Inventors: Tom Truong, John Vogt
  • Patent number: 9645593
    Abstract: Provided is a voltage regulator in which an output current can be controlled stably and accurately to an overcurrent protection set value without the need of providing a phase compensation circuit including an element having a large area. The voltage regulator includes a constant voltage control circuit including: a first differential amplifier circuit for comparing a first reference voltage and a feedback voltage to each other; and an output transistor to be controlled by an output voltage of the first differential amplifier circuit, and an overcurrent protective circuit including: a resistor for measuring the output current; a second differential amplifier circuit for measuring a difference between voltages at both terminals of the resistor; a comparator for comparing an output voltage of the second differential amplifier circuit and a second reference voltage to each other; and a switch to be controlled by a detection signal of the comparator.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: May 9, 2017
    Assignee: SII SEMICONDUCTOR CORPORATION
    Inventor: Toshiyuki Tsuzaki
  • Patent number: 9606566
    Abstract: A trans-conductance regulation circuit, a trans-conductance error amplifier module and a power converter. The trans-conductance regulation circuit provides a bias current at least partially based on an output voltage of the power converter. The bias current is sent to bias a trans-conductance operational amplifier in the trans-conductance error amplifier module so that a trans-conductance of the trans-conductance operational amplifier is direct proportional to the output voltage of the power converter. The power converter regulates the output voltage based on a negative feedback loop comprising the trans-conductance error amplifier module. The trans-conductance error amplifier module may help to maintain a band width of the negative feedback loop substantially stable and immune to variations in the output voltage.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: March 28, 2017
    Assignee: CHENGDU MONOLITHIC POWER SYSTEMS CO., LTD.
    Inventor: Lei Li
  • Patent number: 9582017
    Abstract: The reversal of the flow of output current in a voltage regulator is prevented by equipping the voltage regulator of a regulation transistor controlled by an analog voltage control, having its current terminals connected between the control terminal of the fifth transistor power of the regulator and the power supply line or the common ground node of the regulator. The regulation transistor is configured to provide an electrical path of conduction between the control terminal and the power supply line or the ground node and is controlled by an analog voltage control that varies in a continuous manner between a first level, suitable to extinguish the regulation transistor, and a second level suitable for biasing it in an operating condition of deep conduction, as the difference between the supply voltage and the regulated output voltage approaching an offset voltage.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: February 28, 2017
    Assignee: STMICROELECTRONICS DESIGN AND APPLICATION S.R.O.
    Inventor: Sandor Petenyi
  • Patent number: 9507357
    Abstract: The present document relates to a current sensing and/or control circuit with reduced sensing errors. A current control circuit for controlling a load current into an electronic device is described. The current control circuit comprises an array of control transistors configured to adjust the load current provided at an output of the array of control transistors. The load current is drawn from a power supply at an input voltage. Furthermore, the power supply is coupled to an input of the array of control transistors. The circuit further comprises a reference transistor coupled to the power supply at an input of the reference transistor and a reference current source configured to draw a reference current at an output of the reference transistor.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: November 29, 2016
    Assignee: Dialog Semiconductor GmbH
    Inventors: Marcus Weis, Stephan Drebinger, Fabio Rigoni