With A Specific Feedback Amplifier (e.g., Integrator, Summer) Patents (Class 323/280)
  • Patent number: 10429867
    Abstract: The disclosure provides an LDO voltage regulator circuit and a related method. The circuit includes an error amplifier having a localized common-mode feedback circuit, receiving a reference voltage, a feedback voltage, and an input voltage, and generating an amplified error voltage; a pass element having a power transistor, receiving the amplified error voltage, and generating an output voltage; a feedback circuit receiving the output voltage and having a voltage divider which scales down the output voltage; a first compensation element having a first terminal which connects to an output of the input differential transistor pair and a second terminal which receives the output voltage; and a second compensation element having a third terminal which receives the output voltage and connects to the second terminal and a fourth terminal which connects to an input of a first transistor pair of the localized common-mode feedback circuit.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 1, 2019
    Assignee: Winbond Electronics Corp.
    Inventor: Jungung Kim
  • Patent number: 10423176
    Abstract: A low-dropout regulator comprises a first switching transistor, a comparator, and a Miller capacitor. The first terminal of the first switching transistor is connected to a load, and the second terminal of the first switching transistor is connected to a power supply voltage. The first input terminal of the comparator is connected to a reference voltage, the second input terminal of the comparator is connected to the first terminal of the first switching transistor, and the output terminal of the comparator is connected to the control terminal of the first switching transistor. The first terminal of the Miller capacitor is connected to the control terminal of the first switching transistor, and the second terminal of the Miller capacitor is connected to the first terminal of the first switching transistor and the load.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: September 24, 2019
    Assignee: Yangtze Memory Technologies Co., Ltd.
    Inventors: Feng Pan, Zhenyu Lu, Steve Weiyi Yang, Simon Shi-Ning Yang
  • Patent number: 10396717
    Abstract: Disclosed is a power control method for a radio frequency power amplifier, comprising the following steps: S1. reading a power source voltage signal and a power control signal and generating an amplified signal having a linear relationship with the power control signal; S2. according to the amplified signal and saturation information, generating one or more controlled currents, merging each controlled current, and converting the merged total current into voltage; S3. Conducting linear voltage regulation on the converted voltage and generating a base control voltage of the radio frequency power amplifier. The present invention dynamically monitors the saturation information of a pass element to change the base voltage of the radio frequency power amplifier, thus improving additional power efficiency of the radio frequency power amplifier at multiple power level and over a large power source voltage range, and improving the properties of the radio frequency switch thereof.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: August 27, 2019
    Assignee: BEIJING VANCHIP TECHNOLOGIES CO., LTD.
    Inventor: Xida Liu
  • Patent number: 10396667
    Abstract: There is provided a DC-DC converter which is safe and secure, but yet with low power consumption. The DC-DC converter is configured such that an overcurrent protection circuit is operated intermittently only for a predetermined period of time based on a signal output from an output control circuit to turn on a switching element.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: August 27, 2019
    Assignee: ABLIC INC.
    Inventors: Akihiro Kawano, Katsuya Goto
  • Patent number: 10317921
    Abstract: A power supply is disclosed. The power supply includes a first switch and a second switch. The gate of the first switch is coupled to the gate of the second switch. The power supply further includes a cutoff switch coupled between the first switch and an input voltage port. A comparator is included for comparing a voltage at a feedback port with a fixed reference voltage. The comparator opens the cutoff switch when the voltage at the feedback port is lower than the fixed reference voltage.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: June 11, 2019
    Assignee: NXP USA, Inc.
    Inventor: Xianghua Shen
  • Patent number: 10310530
    Abstract: A circuit comprises: a pass transistor; a first transistor comprising a gate coupled to the gate of the pass transistor, a source coupled to the source of the pass transistor, and a drain; a second transistor comprising a gate coupled to the gate of the pass transistor, a source coupled to the source of the pass transistor, and a drain; a first current mirror coupled to the drain of the first transistor; a second current mirror coupled to the drain of the second transistor, and coupled to the first current mirror; a feedback voltage circuit coupled to the drain of the pass transistor; an error amplifier comprising a first input port coupled to the feedback voltage circuit, and an output port coupled to the gate of the pass transistor; and a capacitor coupled to the second current mirror and to the first input port of the error amplifier.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: June 4, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Feng Lu, Qingjie Ma
  • Patent number: 10296029
    Abstract: Devices and methods to design voltage regulators requiring lower power consumption, wide output current and input voltage range, low dropout, and small footprint. The disclosed methods and devices provide solutions to stabilize such regulators in the presence of widely varying loads by tracking a pole of the transfer function, the pole of the transfer function corresponding to a combination of the load capacitance and the load resistance.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: May 21, 2019
    Assignee: pSemi Corporation
    Inventor: Gary Chunshein Wu
  • Patent number: 10281943
    Abstract: A low dropout voltage regulator incorporates an N-channel MOS pass transistor, a main error amplifier, a first buffer circuit, an auxiliary error amplifier, a second buffer circuit, and a decision circuit. The auxiliary error amplifier consumes less bias current. In one embodiment, the decision circuit compares the portion of the output voltage with a bias voltage to control the gate of the N-channel MOS pass transistor, wherein the value of the bias voltage is less than the value of the reference voltage.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: May 7, 2019
    Assignee: ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC.
    Inventor: I-Hsiu Ho
  • Patent number: 10270338
    Abstract: In some examples, a shunt regulator includes a plurality of selection pins configured to receive a digital signal. The shunt regulator also includes an internal reference voltage selection circuit coupled to the plurality of selection pins, the internal reference voltage selection circuit configured to select a first internal reference voltage of the shunt regulator based on the digital signal. The shunt regulator further includes a soft ramp control circuit coupled to the internal reference voltage selection circuit and to a soft ramp control pin that is configured to carry a second internal reference voltage, the soft ramp control circuit configured to compare the first and the second internal reference voltages to generate a soft ramp control output signal.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: April 23, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Kumar G. Santhosh, Xiadong Cai, Aditya Ambardar, Rahul Mishra
  • Patent number: 10254778
    Abstract: Compensation circuits, compensated voltage regulators, and methods are provided for stabilizing voltage regulators, or other circuits that use operational amplifiers, over a wide range of output current. The described techniques provide a zero whose frequency varies linearly with an output current, and which can be used to track and compensate for a pole whose frequency similarly varies with the output current. The variable-frequency zero is created using a compensation capacitor placed in series with a variable resistance, wherein the resistance is configured to vary linearly with the output current. A pole-tracking zero generated in this way may be used to overcome difficulties encountered when the gain of a system includes a pole whose frequency varies with output current, and serves to improve the phase margin of amplifier circuitry, including that used within voltage regulators, and/or serves to ensure stability over a wide range of output current.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: April 9, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Adriano Sambucco, Emiliano Alejandro Puia
  • Patent number: 10234881
    Abstract: A voltage regulator has a slow loop for providing a regulated DC current and a fast loop for providing a transient current. Feedback information is used to monitor the output voltage and control the current used to generate the output voltage. The voltage regulator does not need a capacitor to create transient current.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: March 19, 2019
    Assignee: NXP B.V.
    Inventors: Shishir Goyal, Arvind Sherigar
  • Patent number: 10236772
    Abstract: An electronic device includes a first circuit having a first ground that receives first and second control signals. A third control signal is produced by a second circuit. The second circuit uses a second ground, and the first ground floats with respect to the second ground. The first circuit determines a value corresponding to a value of a third control signal using a difference between a value of the first control signal and a value of the second control signal, the value of a third control signal being a value relative to the second ground. The first circuit controls a value of an output signal of the first circuit according to the value corresponding to the value of a third control signal.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: March 19, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Seunguk Yang, Wonseok Lim
  • Patent number: 10228756
    Abstract: A voltage regulator may be provided that includes a first circuit to receive at least one feedback signal from a buck converter and to provide at least one driving signal to the buck converter to provide an output voltage based on the at least one feedback signal, and a second circuit to control a super-capacitor to provide the output voltage when the first circuit is not using the buck converter to provide the output voltage.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: March 12, 2019
    Assignee: INTEL CORPORATION
    Inventors: Vikas S. Shilimkar, Don J. Nguyen, Nagasubramanian N. Gurumoorthy
  • Patent number: 10229027
    Abstract: A voltage regulator power reporting offset system includes a monitored power reporting subsystem that determines a monitored power level, offsets the monitored power level using voltage regulator operation offset information to provide a first offset monitored power level, and reports the first offset monitored power level to voltage regulator operation components. A processor power reporting component receives the report of the first offset monitored power level from the monitored power reporting subsystem. A processor power reporting offset subsystem receives the report of the first offset monitored power level from the processor power reporting component, offsets the first offset monitored power level using the processor operation offset information to provide a second offset monitored power level that is different than the first offset monitored power level, and reports the second offset monitored power level to a processing system.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: March 12, 2019
    Assignee: Dell Products L.P.
    Inventors: Shiguo Luo, Ralph Johnson
  • Patent number: 10203710
    Abstract: A voltage regulator which provides an output current at an output voltage at an output node of the voltage regulator, based on an input voltage at an input node of the voltage regulator is described. The voltage regulator has an output amplification stage for deriving the output current at the output node from the input voltage at the input node in dependence of a drive voltage. Furthermore, the voltage regulator has a differential amplification stage to determine the drive voltage in dependence of the output voltage and in dependence of a reference voltage. In addition, the voltage regulator has an adaption unit to determine a capacitance indication of a capacitor value of an output capacitor coupled to the output node of the voltage regulator. The adaption unit also adapts the differential amplification stage in dependence of the capacitance indication.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: February 12, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Ambreesh Bhattad, Frank Kronmueller, Hande Kurnaz
  • Patent number: 10181849
    Abstract: A control circuit provides a signal to a control terminal of the transistor to control the conductivity of the transistor. The control circuit includes a voltage-to-current converter that provides an indication of the control terminal-to-current terminal voltage of a transistor. The control circuit includes control circuitry that uses the indication from the voltage-to-current converter in controlling the current applied to the control terminal.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: January 15, 2019
    Assignee: NXP B.V.
    Inventors: Tarik Naass, Matthias Rose, Henricus Cornelis Johannes Buthker, Arnoud Pieter Van Der Wel
  • Patent number: 10175707
    Abstract: In an example, an apparatus includes: a pass device coupled between a supply voltage node and a load circuit and to provide a regulated voltage to the load circuit in response to a control signal received at a control terminal of the pass device; a first amplifier to compare a reference voltage to the regulated voltage and to output a comparison signal at a comparison node in response to the comparison; a second amplifier having an input device having a control terminal coupled to the comparison node to receive the comparison signal and to output the control signal to the pass device based at least in part in response to the comparison signal; and a feedback circuit to provide a feedback signal to the first amplifier based at least in part on a load current of the load circuit.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: January 8, 2019
    Assignee: Silicon Laboratories Inc.
    Inventors: Li Wei, Steffen Skaug
  • Patent number: 10175706
    Abstract: Disclosed is a low dropout (LDO) voltage regulator that includes a differential amplifier configured to amplify a differential between a reference voltage and a regulated output voltage, a pass transistor coupled to the differential amplifier and driven by an output of the differential amplifier, a compensation capacitor coupled to an output node of the differential amplifier, and an auxiliary amplifier, wherein an output node of the auxiliary amplifier is coupled to the compensation capacitor, and wherein an input node of the auxiliary amplifier is coupled to the pass transistor.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: January 8, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Soheil Golara, Babak Vakili-Amini
  • Patent number: 10133288
    Abstract: An output circuit at the output of an LDO regulator has two FETs (Field-Effect Transistors), a current source and a capacitor. The first FET is connected to the LDO output and a second voltage supply. The second FET is connected in series with the current source between the LDO output and the second voltage supply. The second FET is connected to the first FET in such a matter that a bias voltage is supplied to the first FET so that in static conditions the first FET draws predetermined amounts of current from the LDO output and to divert the predetermined amounts of current to the LDO output or to draw additional amounts of current from the LDO output to compensate for transient currents on the LDO output and to reduce variations in the output voltage of the LDO regulator.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: November 20, 2018
    Assignee: Synopsys, Inc.
    Inventors: Wen Fang, Chinh Vo
  • Patent number: 10135336
    Abstract: A power supply system includes a power source; a load device configured to receive power from the power source; and a power interface device coupled to the power source and the load device and configured to change a first voltage provided by the power source to a second voltage for operating the load device. The power interface device include a main switching converter configured to operate at a first switching frequency and source low frequency current to the load device and an auxiliary switching converter coupled in parallel with the main switching converter and configured to operate at a second and different switching frequency and source fast transient high frequency current to the load device.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: November 20, 2018
    Assignee: Linear Technology Corporation
    Inventor: Jian Li
  • Patent number: 10101758
    Abstract: The present invention relates to a linear regulator with real-time frequency compensation function, which belongs to the technical field of analog integrated circuits. The part of frequency compensation of the present invention includes the dual-frequency compensation networks and compensation transfer switcher, and the pulse delay circuit. The dual-frequency compensation networks and compensation transfer switcher provide the corresponding frequency compensation for linear regulator under two different capacitive loads. The pulse delay circuit generates a set of signals which have a delay related to the switch-pulse signals to control the access of the compensation transfer switcher and capacitive load.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: October 16, 2018
    Assignee: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
    Inventors: Ping Luo, Shuangjie Qiu, Kangle Wang, Zelang Liu, Long Huang
  • Patent number: 10061335
    Abstract: Provided is a voltage regulator having satisfactory transient response characteristics. The voltage regulator includes: a first amplifier for detecting that undershoot occurs in an output voltage; a second amplifier for detecting that overshoot occurs in the output voltage; a first constant current circuit for increasing a bias current of an error amplifier circuit by a first amount for a first time period in response to a signal determined based on one of an output signal of the first amplifier and an output signal of the second amplifier; a second constant current circuit for increasing the bias current of the error amplifier circuit by a second amount larger than the first amount for a second time period shorter than the first time period in response to a signal determined based on the output signal of the first amplifier; and a first switch circuit for pulling up a gate of an output transistor in response to a signal determined based on the output signal of the second amplifier.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: August 28, 2018
    Assignee: ABLIC INC.
    Inventors: Tadashi Kurozo, Tomoyuki Yokoyama
  • Patent number: 10054970
    Abstract: A voltage regulator which provides an output current at an output voltage at an output node, based on an input voltage at an input node is described. The voltage regulator has an output amplification stage comprising a pass transistor for deriving the output current at the output node from the input voltage at the input node; and comprising a driver stage to set a gate voltage at a gate of the pass transistor based on a drive voltage. A gain of the output amplification stage is adjustable. Furthermore, the voltage regulator comprises a differential amplification unit to determine the drive voltage in dependence of the output voltage and in dependence of a reference voltage. In addition, the voltage regulator comprises a gain control circuit to adjust the gain of the output amplification stage in dependence of the output current.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: August 21, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Ambreesh Bhattad, Frank Kronmueller
  • Patent number: 10054969
    Abstract: A reference circuit may include a bandgap reference stage, a filter stage, and a buffer stage. The reference stage may be configured to generate a reference voltage or current. The filter stage may be coupled to the reference stage and may be configured to receive the reference voltage or current, filter noise from the reference voltage or current, receive a buffer output voltage or current, and filter noise from the buffer output voltage or current. The buffer stage may be coupled to the filter stage and may be configured to isolate the reference stage and the filter stage from a loading effect of a load circuit and generate a reference signal based on the reference voltage or current to drive the load circuit.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: August 21, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anand Subramanian, Anand Kannan, Sunil Rafeeque, Venakatesh Guduri
  • Patent number: 10033301
    Abstract: A power interface device includes a main switching converter and an auxiliary switching converter. The main switching converter is coupled to an input terminal and an output terminal and configured to operate at a first switching frequency to source a low frequency current from the input terminal to the output terminal. The auxiliary switching converter is coupled to the input terminal and the output terminal in parallel with the main switching converter and configured to operate at a second and higher switching frequency than the first switching frequency to source a fast transient high frequency current from the input terminal to the output terminal.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: July 24, 2018
    Assignee: Linear Technology LLC
    Inventors: Jindong (Henry) Zhang, Jian Li
  • Patent number: 10031541
    Abstract: In one example, a circuit includes a pass module, a first sensing module, a second sensing module, a decision module, and a control module. The pass module is configured to modify, based on a control signal, a resistance of a channel that electrically connects an input voltage and a load. The first sensing module is configured to generate a first sensed current. The second sensing module is configured to generate a second sensed current. The decision module is configured to generate a first decision current, generate a second decision current, and generate a composite sensed current based on a summation of the first decision current, the second decision current, the first sensed current, and the second sensed current. The control module is configured to generate the control signal based on the composite sensed current.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: July 24, 2018
    Assignee: Infineon Technologies AG
    Inventor: Derek Bernardon
  • Patent number: 10031539
    Abstract: An output circuit (10) according to the present invention includes a first output terminal (VO) and a second output terminal (SGND); an output transistor (MP1) connected between a first fixed-potential node (VCC) and the first output terminal; an output load (15) connected between the first output terminal and the second output terminal; a control circuit (13) that controls the output transistor so that a monitor voltage (VS) based on a voltage between the first output terminal and the second output terminal matches an input voltage (VI); a constant voltage source (16) whose one end is connected to the second terminal and whose other end is connected to a second fixed-potential node (GND); and a circuit (R4) that forms a current path between the first output terminal and the second fixed-potential node. Accordingly, in the output circuit, stability of a negative feedback loop can be enhanced, and linearity of an output voltage with respect to an input voltage can be enhanced.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: July 24, 2018
    Assignee: AZBIL CORPORATION
    Inventors: Taichiro Kato, Tetsuya Kajita
  • Patent number: 10020738
    Abstract: A control circuit for an interleaved switching power supply having a plurality of parallel coupled power stage circuits, can include: a feedback circuit that receives an output voltage of the interleaved switching power supply, and generates an output voltage feedback signal; a ripple generator that receives a plurality of switching control signals, and generates an AC ripple signal having a frequency that is N times a switching frequency; an adder circuit that adds the output voltage feedback signal with the AC ripple signal, and generates a superposition signal; a comparison circuit that receives the superposition signal and a reference voltage, and generates a comparison signal; and a frequency divider circuit that divides the comparison signal into a plurality of turn on control signals configured to control turn on of a plurality of main power switches in the plurality of power stage circuits.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: July 10, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Yongbin Cai, Shengjun Chen
  • Patent number: 10019023
    Abstract: A low-dropout regulator with super transconductance structure relates to the field of power management technology. The super-transconductance structure refers to the circuit structure in which the voltage signal is converted into a current signal and amplified with a high magnification. The error amplifier EA in the present invention uses the super transconductance structure. The differential input pair of the error amplifier EA samples the difference between the feedback voltage VFB and the dynamic reference voltage VREF1. The difference is converted into a small signal current, which goes through a first-stage of current mirror to be amplified by K1, and through a second-stage of current mirror to be amplified by K2. The amplified signal is used to regulate the gate of the adjustment transistor MP. The error amplifier EA with the super transconductance structure is used to expand the bandwidth of the error amplifier EA.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: July 10, 2018
    Assignee: University of Electronic Science and Technology of China
    Inventors: Xin Ming, Di Gao, Jiahao Zhang, Xuan Zhang, Xiuling Wei, Yao Wang, Zhuo Wang, Bo Zhang
  • Patent number: 10013010
    Abstract: A voltage droop reduction circuit generally including a loop coupled to an output of a voltage regulator is provided. The loop includes a first current amplifier. The voltage droop reduction circuit may also include a first capacitor coupled between the output of the voltage regulator and an input of the first current amplifier.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: July 3, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Sungmin Ock, Xuhao Huang
  • Patent number: 10014790
    Abstract: A dual function solid state power converter operable from a three phase AC input current simultaneously provides; an AC or DC output current on an aircraft power cable to provide ground power to a parked aircraft, and a low voltage DC current on a battery charging power cable to charge batteries in nearby service vehicles. The power converter includes an AC to DC converter which converts the current on an internal DC bus, a DC to AC converter which converts the DC bus current to an AC current at a higher voltage and frequency, or a DC to DC converter which converts the DC bus current to a lower voltage DC, for supplying ground power to a parked aircraft, and a DC to DC converter for converting the DC bus current to a lower voltage battery charging current on the battery charging cable.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: July 3, 2018
    Assignee: Illinois Tool Works Inc.
    Inventor: David Wayne Leadingham
  • Patent number: 10001795
    Abstract: A linear regulator is presented. It comprises a first amplifier stage, one of the inputs being coupled with the output of the linear regulator. It has an intermediate amplifier stage. The input of the intermediate amplifier stage is coupled to the output of the first amplifier stage. It has a driver stage having a pass device driven by the output of the driver stage. The output of the pass device provides the output of the linear regulator. The regulator has a voltage-to-current feedback circuit coupled with the driver stage and the output of the first amplifier stage for regulating the output resistance of the first amplifier stage depending on load conditions of the linear regulator. The voltage-to-current feedback circuit has a transistor and a current limitation circuit to limit the regulation of the output resistance of the first amplifier stage to low load conditions of the linear regulator.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: June 19, 2018
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Mihail Jefremow, Dan Ciomaga, Qiao Yang, Stephan Drebinger, Fabio Rigoni
  • Patent number: 10001796
    Abstract: The present disclosure provides a low dropout linear voltage regulator, including: an amplifier, configured to have a first input end receiving a reference voltage, a second input end configured to receive a feedback voltage, and an output end connected to a first node; an output transistor, having a control end connected to the first node, a first end connected to a first power source potential, and a second end connected to a second node and configured to provide an output voltage; a feedback circuit, connected to the second node and configured to provide the feedback voltage according to the output voltage; and a compensation circuit, comprising at least one of a first compensation amplifier, a second compensation amplifier and a first variable current source. The compensation circuit detects and suppresses a voltage transient generated when a load switching from light to heavy occurs at the second node.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: June 19, 2018
    Assignee: EverDisplay Optronics (Shanghai) Limited
    Inventor: Che-Cheng Liu
  • Patent number: 9985479
    Abstract: An information collection circuit includes a control circuit, which collects information of a measurement subject from a detection circuit, and a rectification circuit, which rectifies electromotive force. A first switch, coupled between the rectification circuit and the control circuit, becomes conductive based on DC voltage generated by the rectification circuit. A second switch, coupled between the control circuit and a battery, becomes conductive based on a control signal provided from the control circuit. The second switch is non-conductive when the control circuit is inactive. The control circuit is activated by a first power voltage supplied via the first switch to control the second switch to become conductive, and is operated based on a second power voltage supplied from the battery via the conductive second switch.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: May 29, 2018
    Assignee: Shinko Electric Industries Co., LTD.
    Inventor: Tomoki Kobayashi
  • Patent number: 9954460
    Abstract: A voltage control device includes an output module and a control module. The output module provides an output current at an output terminal thereof based on a control voltage. The control module includes a comparing circuit, a capacitor, a charging circuit and a discharging circuit. The comparing circuit compares a to-be-compared voltage, which is associated at least with a to-be-controlled voltage at the output terminal of the output module, with a predetermined reference voltage to generate a comparison signal. The capacitor provides the control voltage. The charging circuit is operable to charge the capacitor based on the comparison signal. The discharging circuit is operable to discharge the capacitor based on the comparison signal.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: April 24, 2018
    Assignee: MACROBLOCK, Inc.
    Inventors: Lon-Kou Chang, Che-Wei Chang, Ting-Ta Chiang, Shi-Jie Liao
  • Patent number: 9953582
    Abstract: A gray-scale voltage generating circuit includes a ladder resistor circuit and a constant current source. The ladder resistor circuit includes a plurality of resistors connected in series to one another, and is configured to output a plurality of gray-scale voltages with different voltage values from ends of the respective resistors. The constant current source is configured to be connected in series to the ladder resistor circuit.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: April 24, 2018
    Assignee: SONY CORPORATION
    Inventors: Kei Kimura, Junichi Yamashita
  • Patent number: 9940877
    Abstract: A gray-scale voltage generating circuit includes: a ladder resistor circuit including a plurality of resistors connected in series to one another, and configured to output a plurality of gray-scale voltages with different voltage values from ends of the respective resistors; and a constant current source configured to be connected in series to the ladder resistor circuit, in which the constant current source includes a current source transistor configured to be connected in series to the ladder resistor circuit, and a voltage setting section configured to select one voltage from the plurality of voltages and set the selected voltage as a voltage determining a current that is to flow through the current source transistor.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: April 10, 2018
    Assignee: SONY CORPORATION
    Inventors: Kei Kimura, Yusuke Onoyama, Junichi Yamashita
  • Patent number: 9933798
    Abstract: Provided is a voltage regulator configured to stably operate with low current consumption, and having good responsiveness. A delay circuit is provided between a transient response improvement circuit and a voltage amplifier circuit.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: April 3, 2018
    Assignee: SII SEMICONDUCTOR CORPORATION
    Inventor: Yoshihisa Isobe
  • Patent number: 9915963
    Abstract: Devices and methods to design voltage regulators requiring lower power consumption, wide output current and input voltage range, low dropout, and small footprint. The disclosed methods and devices provide solutions to stabilize such regulators in the presence of widely varying loads.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: March 13, 2018
    Assignee: pSemi Corporation
    Inventor: Gary Chunshien Wu
  • Patent number: 9891643
    Abstract: A method to adjust the load transient regulation of a low drop-out (LDO)/load switch linear voltage regulator (LVR) with an n-type pass element having an open loop transfer function, including determining during a load transient event if the gate of the pass—element goes lower than a scaled value of the output voltage or a constant voltage level, generating a control signal that controls a current sink block if the gate voltage of the pass element is lower than the output voltage, and enabling a current sink block that is controlled by the control signal and connecting the output of the current sink block to the output of the LVR.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: February 13, 2018
    Assignee: Vidatronic, Inc.
    Inventors: Mohamed Ahmed Mohamed El-Nozahi, Faisal Abdellatif Elseddeek Ali Hussien, Mohamed Mostafa Saber Aboudina, Sameh Ahmed Assem Mostafa Ibrahim, Moises Emanuel Robinson
  • Patent number: 9893618
    Abstract: In some examples, a voltage regulator comprises an amplifier stage and a pass element configured to receive an output of the amplifier stage and an output of a feedback circuit. The voltage regulator further comprises the feedback circuit configured to receive an output of the pass element, wherein the feedback circuit includes a differentiator stage coupled to a feedback output stage, and wherein the differentiator stage comprises a single capacitor configured to differentiate an output voltage of the pass element.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: February 13, 2018
    Assignee: Infineon Technologies AG
    Inventor: Fabio Ballarin
  • Patent number: 9874887
    Abstract: A voltage regulator circuit with variable feedback is disclosed. In one embodiment, a voltage regulator includes an amplifier having a first input configured to receive a reference voltage and a second input configured to receive a feedback signal. The voltage regulator further includes first and second transistors each having respective gate terminals coupled to an output of the amplifier. A resistor network coupled to the second input of the amplifier and further coupled to the first and second transistors. The resistor network is configured to produce the feedback signal based on currents through the first and second transistors, respectively.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: January 23, 2018
    Assignee: Silicon Laboratories Inc.
    Inventors: Shouli Yan, Alan Westwick
  • Patent number: 9843260
    Abstract: A supply modulator including a first switched-mode power supplier configured to transmit a modulated voltage to an output node in response to an envelope signal, the first switched mode power supplier including: a switching circuit configured to transmit a pulse signal in response to the amplitude of the envelope signal; and a low pass filter configured to generate the modulated voltage by filtering certain frequency band of the pulse signal, the low pass filter comprising a plurality of stages; and a second switched-mode power supplier configured to selectively transmit a compensation current to the output node in response to the current transmitted from the first switched-mode power supplier, wherein each of the plurality of stages of the low pass filter comprises at least one variable impedances.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: December 12, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji Seon Paek, Dongsu Kim, Younghwan Choo
  • Patent number: 9837831
    Abstract: A feedback controlled coil driver with ASK modulation is disclosed. A class E coil driver drives an LC circuit to generate a magnetic signal via the inductor. A modulation capacitor is coupled to the LC circuit to modulate the coil driver signal. The voltage across the coil driver switch is sampled. The difference between the sampled voltage and a reference voltage is integrated and compared to a ramp voltage to obtain an optimal on time for the coil driver switch such that coil current is maximized.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: December 5, 2017
    Assignee: The Alfred E. Mann Foundation For Scientific Research
    Inventor: Edward K. F. Lee
  • Patent number: 9836070
    Abstract: The regulator with a low dropout voltage comprises an error amplifier comprising a differential pair of input transistors and a circuit with folded cascode structure connected to the output of the said differential pair, an output stage connected to the output node of the error amplifier, and a Miller compensation capacitor connected between the output stage and the cascode node on the output side (XP) of the cascode circuit; the error amplifier furthermore comprises at least one inverting amplifier module in a feedback loop between the said cascode node and the gate of the cascode transistor of the cascode circuit connected between the said cascode node and the said output node.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: December 5, 2017
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: Jimmy Fort, Thierry Soude
  • Patent number: 9817415
    Abstract: A low drop-out regulator circuit comprises a pass transistor providing an output voltage on an output terminal in response to a gate voltage on a gate of the pass transistor. A feedback circuit is coupled to the output terminal to generate a feedback voltage, and an error amplifier provides a drive signal in response to a reference voltage and the feedback voltage. A first gate driver circuit is operable over a first voltage range to provide the gate voltage to the pass transistor in response to the drive signal. A second gate driver circuit is operable over a second voltage range to provide the gate voltage to the pass transistor in response to the drive signal, where the second voltage range is lower than the first voltage range.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: November 14, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Vincenzo F. Peluso, Liangguo Shen, Hua Guan, Mengmeng Du, Ngai Yeung Ho
  • Patent number: 9806759
    Abstract: An apparatus comprises a radio frequency (RF) transceiver circuit; a phase modulator that comprises digital-to-time converter (DTC) circuitry configured to convert a digital value to a specified signal phase of a signal transmitted by the RF transceiver circuit; low drop out regulator (LDO) circuitry operatively coupled to the DTC circuitry, wherein a bias current of the LDO circuitry is adjustable; and logic circuitry operatively coupled to the LDO circuitry and DTC circuitry, wherein the logic circuitry is configured to set the adjustable bias current of the LDO circuitry according to a digital value input to the DTC circuitry.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: October 31, 2017
    Assignee: Intel IP Corporation
    Inventors: Sebastian Sievert, Ofir Degani, Eshel Gordon
  • Patent number: 9793707
    Abstract: Apparatus disclosed herein implement a fast transient precision current limiter such as may be included in an electronic voltage regulator. The current limiter includes two current sense element/current clamp control loops. A fast response time control loop first engages and clamps a current spike. A precision control loop then engages to more accurately clamp the output current to a programmed set point. The precision clamping loop includes an inner loop to linearize the precision current sense element. The inner loop forces the drain-to-source voltage (VDS) of the precision sense element to track the VDS of the regulator pass element. A more precise clamping operation results. Overall speed is not sacrificed as the fast response time clamping loop operates in parallel to protect circuitry while the precision clamping loop engages.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: October 17, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Hector Torres, Charles Parkhurst
  • Patent number: 9791875
    Abstract: A low dropout regulator (LDO) is disclosed. The LDO includes a transistor loop including a first transistor coupled to a second transistor. The first transistor and the second transistor coupled to a first resistor and a second resistor. The first resistor being coupled to ground and second resister coupled to the first resistor. The LDO further includes an output transistor coupled to the second transistor and a power supply line. The output transistor further coupled to a pair of input transistors coupled to the power supply line. One of the input transistors coupled to a third resistor, wherein the third resistor coupled to a fourth resistor and the fourth resistor coupled to ground. The LDO also includes a fifth resistor coupled to an output of the output transistor. The fifth resistor is coupled to the first transistor.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: October 17, 2017
    Assignee: NXP B.V.
    Inventor: Ge Wang
  • Patent number: 9780664
    Abstract: A power supply device, including: a switching structure for controlling a continuous current in an inductive load on the basis of at least one control signal of a power switch; and anomaly detection elements, generating at least one item of information about the detection of an anomaly of the open circuit type in the wiring from the load to the switching structure. The anomaly detection elements include: elements for measuring the current flowing in the inductive load; elements for comparing the measured current continuously with a threshold value; and elements for counting a time interval during which the measured current remains continuously below the threshold value, delivering the anomaly detection information if the counted time interval>a reference time interval, which is k times greater than a period of the control signal, where k>1, and if the duty cycle of the control signal>a threshold value.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: October 3, 2017
    Assignees: CONTINENTAL AUTOMOTIVE FRANCE, CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Angelo Pasqualetto, Marie-Nathalie Larue