Using A Three Or More Terminal Semiconductive Device As The Final Control Device Patents (Class 323/265)
  • Patent number: 10338632
    Abstract: An adaptive voltage converter adapted to compensate for the exponential sensitivities of sub-threshold and near-threshold circuits. The converter can change its power/performance characteristics between different energy modes. The converter may comprise two or more voltage converters/regulators. A multiplexing circuit selects between the outputs of the several converters/regulators depending on the state of a control signal generated by a control facility. The converter is specially adapted to change the output of each converter/regulator based on a number of variables, including, for example, process corner, temperature and input voltage.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: July 2, 2019
    Assignee: Ambiq Micro, Inc.
    Inventors: Scott Hanson, Yanning Lu
  • Patent number: 10310572
    Abstract: Thermal reduction and voltage adjustment techniques for computing systems and processing devices are presented herein. In a first example, a method of operating a voltage control system for a processing device includes operating the processing device in a computing assembly at a selected performance level, the processing device supplied with at least one input voltage at a first voltage level. The method includes monitoring thermal information associated with the computing assembly, and when the thermal information indicates a temperature associated with the computing assembly exceeds a threshold temperature, adjusting the at least one input voltage level supplied to the processing device to a second voltage level lower than the first voltage level and continuing to operate the processing device at the selected performance level.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: June 4, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: William Paul Hovis, Garrett Douglas Blankenburg, Peter Anthony Atkinson, Robert James Ray, Andres Felipe Hernandez Mojica, Samy Boshra-Riad, Erng-Sing Wee, Brian Keith Langendorf
  • Patent number: 10305377
    Abstract: Representative implementations of devices and techniques may minimize switching losses and voltage ripple in a switched capacitor de-de converter. A digital controller is used to control switching, based on an existing load. In some examples, the digital controller may insert a dead-time phase in a switching period, which may reduce voltage ripple for a low output load current. In other examples, the digital controller may adjust the conductance of a plurality of sub-switches, where the plurality of sub-switches may include one or more sub-switches that have a higher on-resistance than other sub-switches. For example, a sub-switch may have an on-resistance that is a multiple of the on-resistance of other sub-switches.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 28, 2019
    Assignee: Infineon Technologies AG
    Inventors: Kyrylo Cherniak, Werner Hoellinger, Gerhard Maderbacher, Stefano Marsili, Volha Subotskaya
  • Patent number: 10277132
    Abstract: System and method for regulating a power converter. The system includes a first signal generator configured to receive a first sensed signal and generate an output signal associated with demagnetization. The first sensed signal is related to a first winding coupled to a secondary winding for a power converter, and the secondary winding is associated with at least an output current for the power converter. Additionally, the system includes a ramping signal generator configured to receive the output signal and generate a ramping signal, and a first comparator configured to receive the ramping signal and a first threshold signal and generate a first comparison signal based on at least information associated with the ramping signal and the first threshold signal. Moreover, the system includes a second comparator configured to receive a second sensed signal and a second threshold signal and generate a second comparison signal.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: April 30, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Yaming Cao, Xiaomin Huang, Xiuhong Zhang, Lieyi Fang
  • Patent number: 10209724
    Abstract: A voltage regulator includes an operational amplifier that compares a feedback voltage that is proportional to an output voltage and a predetermined reference voltage that corresponds to a desired output voltage. The operational amplifier controls the conduction state of an output transistor according to the comparison. A detecting circuit monitors the operating state of the operational amplifier, and in the case that the operational amplifier is not operating, outputs a signal which causes the output transistor to be placed in a non-conductive state.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: February 19, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventor: Masayuki Usuda
  • Patent number: 10205393
    Abstract: A comparator circuit includes a first comparator, a second comparator, and a logic portion. The logic portion adjust a variable reference voltage input to the second comparator to become close to a reference voltage input to the first comparator, during a period from a time point when reverse current of current flowing in a coil disposed in a switching power supply device is detected in a state where a first comparison signal is output as a comparison signal while the first comparator and the second comparator are operated, until a first predetermined period of time elapses in a state where switching operation of the switching power supply device is stopped (excluding a period from a time point when the reverse current is detected until a second predetermined period of time shorter than the first predetermined period of time elapses).
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: February 12, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Genki Tsuruyama, Tetsuo Tateishi
  • Patent number: 10205395
    Abstract: System and method for regulating an output current of a power conversion system. An example system controller for regulating an output current of a power conversion system includes a driving component, a demagnetization detector, a current-regulation component, and a signal processing component. The driving component is configured to output a drive signal to a switch in order to affect a primary current flowing through a primary winding of the power conversion system. The demagnetization detector is configured to receive a feedback signal associated with an output voltage of the power conversion system and generate a detection signal based on at least information associated with the feedback signal. The current-regulation component is configured to receive the drive signal, the detection signal and a current-sensing signal and output a current-regulation signal based on at least information associated with the drive signal, the detection signal, and the current sensing signal.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: February 12, 2019
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Lieyi Fang
  • Patent number: 10103630
    Abstract: A power supply is disclosed. The power supply an output diode, a main switch coupled to the input filter and an output inductor coupled to the output diode and the main switch. The power supply also includes a bypass switch coupled to the main switch and configured to bypass the output inductor. A switch driver is included and the switch driver is configured to turn on the bypass switch and upon detecting the output diode in a blocking mode, turn on the main switch and turn off the bypass switch.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: October 16, 2018
    Assignee: NXP B.V.
    Inventors: Lucas Pieter Lodewijk van Dijk, Martin Wagner, Gert van der Horn
  • Patent number: 10050520
    Abstract: The present disclosure illustrates a charge pump circuit. The charge pump circuit includes an input voltage module and a switching transistor module. The input voltage module is configured for providing an input voltage. The switching transistor module is configured for receiving a supply voltage and the input voltage. There is a voltage difference between the supply voltage and the input voltage. During a first charging period, the switching transistor module charges a first capacitor, and a voltage across the first capacitor is the voltage difference. During a second charging period, the switching transistor module charges a second capacitor, and a voltage across the second capacitor is a sum of the supply voltage and the voltage difference. A frequency which the switching transistor module charges the second capacitor is higher than a frequency which the second capacitor provides voltage to a bridge circuit.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: August 14, 2018
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Ming-Jung Tsai
  • Patent number: 10008939
    Abstract: System and method for protecting a power conversion system. An example system controller includes a protection component and a driving component. The protection component is configured to receive a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system, process information associated with the demagnetization signal and a detected voltage generated based on at least information associated with the feedback signal, and generate a protection signal based on at least information associated with the detected voltage and the demagnetization signal. The driving component is configured to receive the protection signal and output a driving signal to a switch configured to affect a primary current flowing through a primary winding of the power conversion system. The detected voltage is related to an output voltage of the power conversion system. The demagnetization signal is related to a demagnetization period of the power conversion system.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: June 26, 2018
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Yuan Lin, Xiuhong Zhang, Lieyi Fang
  • Patent number: 9893631
    Abstract: A power transfer system includes DC-DC power conversion circuitry that has a first switch and a second switch on either side of a transformer connected via a common ground with a first capacitor and a second capacitor cross-connected across the transformer. A direction of power transfer is determined, and primary and secondary sides of the DC-DC power conversion circuitry are aligned based on the direction of power transfer. An amount of on-time for the first switch or the second switch is determined based on a quantity of power transfer through the DC-DC power conversion circuitry. The primary and secondary switches are controlled using switching.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: February 13, 2018
    Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
    Inventor: Masanori Ishigaki
  • Patent number: 9886046
    Abstract: A voltage regulator includes an operational amplifier that compares a feedback voltage that is proportional to an output voltage and a predetermined reference voltage that corresponds to a desired output voltage. The operational amplifier controls the conduction state of an output transistor according to the comparison. A detecting circuit monitors the operating state of the operational amplifier, and in the case that the operational amplifier is not operating, outputs a signal which causes the output transistor to be placed in a non-conductive state.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: February 6, 2018
    Assignee: Toshiba Memory Corporation
    Inventor: Masayuki Usuda
  • Patent number: 9862216
    Abstract: A power supply apparatus includes a power source unit supplying power to an electric load through a power supply line, a capacitor connected to the power supply line, a charge circuit charging the capacitor while restricting a current value of the power supplied from the power source unit, a detection unit detecting a voltage value of the capacitor, a controller which switches, after the charge of the capacitor is completed, a current value of the charge circuit to a first current value smaller than a current value supplied before the charge of the capacitor is completed, a first determination unit determining whether a first condition is satisfied based on the voltage value detected by the detection unit after the charge of the capacitor is completed, and a second determination unit determining whether an error process is to be performed based on a determination result of the first determination unit.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: January 9, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisao Okita, Yasufumi Ogasawara, Takashi Sakai, Toru Oshika, Shinya Ishikawa
  • Patent number: 9864426
    Abstract: A voltage regulator and/or associated circuitry provides an indication of average current consumed or drawn by a load, level and magnitude of transient events, and regulation efficiency. A dynamic voltage and frequency scaling governor makes use of the indication of average current consumed or drawn by the load, level and magnitude of transient events, and regulation efficiency to help optimize operation of the load, with respect to power and/or performance.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: January 9, 2018
    Assignee: Endura Technologies LLC
    Inventors: Taner Dosluoglu, Anatoly Gelman
  • Patent number: 9804617
    Abstract: A power control integrated circuit (IC) chip can include a direct current (DC)-DC converter that outputs a switching voltage in response to a switching output enable signal. The power control IC chip can also include an inductor detect circuit that detects whether an inductor is conductively coupled to the DC-DC converter and a powered circuit component in response to an inductor detect signal. The power control IC chip can further include control logic that (i) controls the inductor detect signal based on an enable DC-DC signal and (ii) controls the switching output enable signal provided to the DC-DC converter and a linear output disable signal provided to a linear regulator based on a signal from the inductor detect circuit indicating whether the inductor is conductively coupled to the DC-DC converter and the powered circuit component.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: October 31, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sachin Sudhir Turkewadikar, Nitin Agarwal, Madhan Radhakrishnan
  • Patent number: 9806628
    Abstract: An apparatus and method for controlling the delivery of power from a DC source to an AC grid includes an inverter configured to deliver power from the unipolar input source to the AC grid and an inverter controller. The inverter includes an input converter, an active filter, and an output converter. The inverter controller includes an input converter controller, an active filter controller and an output converter controller. The input converter controller is configured to control a current delivered by the input converter to a galvanically isolated unipolar bus of the inverter. The output converter is configured to control the output converter to deliver power to the AC grid. Additionally, the active filter controller is configured to control the active filter to supply substantially all the power that is deliver by the output controller to the AC grid at a grid frequency.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: October 31, 2017
    Assignee: SunPower Corporation
    Inventors: Patrick L. Chapman, Brian T. Kuhn, Robert S. Balog, Jonathan W. Kimball, Philip T. Krein, Alexander Gray, Trishan Esram
  • Patent number: 9755516
    Abstract: In a switched mode inductive DCDC converter having a first mode that conducts a first current path through an inductor and through a first switch, and a second mode that conducts a second current path through the inductor and through a second switch, a detecting component detects a parameter. The detecting component outputs a biasing signal extend the turn OFF time of one of the switches in order to decrease a voltage build up on the other switch.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: September 5, 2017
    Assignee: Texas Instruments Deutschland GmbH
    Inventors: Hans Schmeller, Erich Bayer
  • Patent number: 9645592
    Abstract: A voltage regulator includes an operational amplifier that compares a feedback voltage that is proportional to an output voltage and a predetermined reference voltage that corresponds to a desired output voltage. The operational amplifier controls the conduction state of an output transistor according to the comparison. A detecting circuit monitors the operating state of the operational amplifier, and in the case that the operational amplifier is not operating, outputs a signal which causes the output transistor to be placed in a non-conductive state.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: May 9, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masayuki Usuda
  • Patent number: 9592892
    Abstract: An active heave compensation system comprises a motor generator to interact with a load so as to drive the load in a first part of a heave motion cycle and to regenerate at least part of energy with which the load has been driven in a second part of the heave motion cycle, and an electrical storage element for storing the regenerated energy. The active heave compensation system further comprises a power supply electrically connected to the motor generator and the electrical storage element for providing electrical power to at least the motor generator, and a control unit configured to control the power supply substantially in synchronism with the heave motion.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: March 14, 2017
    Assignee: ITREC B.V.
    Inventors: Joop Roodenburg, Cornelis Johannes Ekelaar
  • Patent number: 9575499
    Abstract: The invention is directed to a low-dropout voltage regulator (LDO), including a power transistor, a driving stage circuit, a feedback circuit, a bias power source and an auxiliary reference current generation circuit. The power transistor is controlled by a driving signal to convert an input voltage into an output voltage. The feedback circuit generates a feedback voltage according to the output voltage. The driving stage circuit generates the driving signal according to the feedback voltage and the reference voltage. The bias power source provides a bias current. The auxiliary reference current generation circuit is configured to sample an output current, adjust the sampled output current to generate an adjustment current by means of mapping and superpose the adjustment current onto the bias current to generate a reference current to control drive capability of the driving stage circuit.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: February 21, 2017
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Zhong-Wei Liu, Shian-Sung Shiu, Ying-Ying Yang
  • Patent number: 9531261
    Abstract: A power-supply control device that includes a transistor that is interposed between a power source and a load; a control circuit to which a voltage from the power source is applied, the voltage being applied across a high-voltage side input terminal and a low-voltage side input terminal of the control circuit, and that is configured to turn the transistor on or off based on an operating signal for the load that is applied from an external device, and controlling supply of power to the load; a voltage detector that is configured to detect a value of the voltage applied to the control circuit by the power source, and is configured to determine whether or not the applied voltage value detected is lower than a predetermined voltage value; and a negative voltage output circuit.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: December 27, 2016
    Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yuuki Sugisawa, Katsuya Ikuta, Masahiko Furuichi
  • Patent number: 9502976
    Abstract: According to an embodiment, a power supply circuit is provided. The power supply circuit includes a switching transistor which is controlled to be ON/OFF by a PWM signal, and a mode switching control circuit configured to switch a control mode between peak current mode control and valley current mode control depending on the length of an ON time of the PWM signal which drives the switching transistor.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: November 22, 2016
    Assignee: Kabushi Kaisha Toshiba
    Inventors: Chen Kong Teh, Manabu Yamada
  • Patent number: 9473035
    Abstract: A power conversion device includes a full-bridge switch circuit, a converter circuit, and a control circuit. The full-bridge switch circuit is operable to convert a direct current input voltage to a converted voltage. The converter circuit converts the converted voltage into a direct current output voltage. The converter circuit includes a resonant inductor, a transformer, a first converter switch, a second converter switch, an output inductor, and an output capacitor. The direct current output voltage is provided across the output capacitor. The control circuit controls the full-bridge switch circuit, the first converter switch and the second converter switch based on the direct current output voltage and a reference voltage.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: October 18, 2016
    Assignees: Lite-On Electronics (Guangzhou) Limited, Lite-On Technology Corp.
    Inventors: Peng Qu, Jianhua Zhou, Zhihong Ye
  • Patent number: 9423817
    Abstract: A power source circuit for idling-stop vehicles is provided whereby at normal times other than a restarting of an engine after being idling-stopped, a first voltage detected by a current detection circuit when a bypass switch is turned off is acquired, and a second voltage detected by the current detection circuit when the bypass switch is turned on is also acquired, and an electric current flowing from a battery to a load via the bypass switch is obtained on the basis of a difference between the first voltage and the second voltage.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: August 23, 2016
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventor: Norihisa Sakakibara
  • Patent number: 9391453
    Abstract: An apparatus such as heterogeneous device includes at least a first die and a second die. The apparatus further includes a first inductive element, a second inductive element, and switch control circuitry. The switch control circuitry is disposed in the first die. The switch control circuitry controls current through the first inductive element to produce a first voltage. The first voltage powers the first die. The second inductive element is coupled to the first inductive element. The second inductive element produces a second voltage to power the second die. The first die and second die can be fabricated in accordance with different technologies and in which the first die and second die withstand different maximum voltages. A magnitude of the first voltage can be greater than a magnitude of the second voltage.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: July 12, 2016
    Assignee: Intel Corporation
    Inventors: Guido Droege, Andre Schaefer, Uwe Zillmann
  • Patent number: 9385612
    Abstract: System and method for regulating a power converter. The system includes a first signal generator configured to receive a first sensed signal and generate an output signal associated with demagnetization. The first sensed signal is related to a first winding coupled to a secondary winding for a power converter, and the secondary winding is associated with at least an output current for the power converter. Additionally, the system includes a ramping signal generator configured to receive the output signal and generate a ramping signal, and a first comparator configured to receive the ramping signal and a first threshold signal and generate a first comparison signal based on at least information associated with the ramping signal and the first threshold signal. Moreover, the system includes a second comparator configured to receive a second sensed signal and a second threshold signal and generate a second comparison signal.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: July 5, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Yaming Cao, Xiaomin Huang, Xiuhong Zhang, Lieyi Fang
  • Patent number: 9350252
    Abstract: System and method for protecting a power conversion system. An example system controller includes a protection component and a driving component. The protection component is configured to receive a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system, process information associated with the demagnetization signal and a detected voltage generated based on at least information associated with the feedback signal, and generate a protection signal based on at least information associated with the detected voltage and the demagnetization signal. The driving component is configured to receive the protection signal and output a driving signal to a switch configured to affect a primary current flowing through a primary winding of the power conversion system. The detected voltage is related to an output voltage of the power conversion system. The demagnetization signal is related to a demagnetization period of the power conversion system.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: May 24, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Yuan Lin, Xiuhong Zhang, Lieyi Fang
  • Patent number: 9225239
    Abstract: A multiple output charge pump that includes a first flying capacitor, a second flying capacitor, a first output node, a second output node, and a switching network. The first output node is configured to provide a first voltage, and the second output node is distinct from the first output node and is configured to provide a second voltage, different than the first voltage. The switching network is configured to provide a first mode of operation in which the first and second flying capacitors are connected in one of in series with one another between an input voltage and ground or in parallel with one another between the input voltage and ground, a second mode of operation in which the first and second flying capacitors are connected in parallel with one another between ground and the second output node, and a third mode of operation.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: December 29, 2015
    Assignee: ADVANCED ANALOGIC TECHNOLOGIES, INCORPORATED
    Inventor: Richard K. Williams
  • Patent number: 9225234
    Abstract: A circuit for a charge-pump low-dropout (LDO) regulator may include a comparator circuit configured to control a pass transistor based on an error signal. A pre-charge path may be provided between a supply voltage and an output node of the regulator. The pre-charge path may be configured to allow charging of an output capacitor to a pre-charge voltage during a pre-charge operation mode. The output capacitor may be coupled between the output node of the regulator and ground potential. The pass transistor may be configured to allow charging of the output capacitor during an LDO mode of operation. A charge-pump circuit may be configured to provide a current for charging the output capacitor during the LDO mode of operation.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 29, 2015
    Assignee: Broadcom Corporation
    Inventors: I-Ning Ku, Hui Zheng, Xicheng Jiang
  • Publication number: 20150145487
    Abstract: According to an embodiment, generating an adjustable bandgap reference voltage includes generating a current proportional to absolute temperature (PTAT). Generating the PTAT current includes equalizing voltages across the terminals of a core that is designed to be traversed by the PTAT current. Generating the adjustable bandgap reference also includes generating a current inversely proportional to absolute temperature (CTAT), summing the PTAT and the CTAT currents and generating the bandgap reference voltage based on the sum of the currents. Equalizing includes connecting-across the terminals of the core a first fed-back amplifier with at least one first stage arranged as a folded setup and including first PMOS transistors arranged according to a common-gate setup. Equalizing also includes biasing the first stage based on the CTAT current. The summation of the PTAT and CTAT currents is performed in the feedback stage of the first amplifier.
    Type: Application
    Filed: February 2, 2015
    Publication date: May 28, 2015
    Inventors: Jimmy Fort, Thierry Soude
  • Patent number: 9008251
    Abstract: The present invention discloses an adaptive phase-shifted synchronization clock generation circuit and a method for generating phase-shifted synchronization clock. The adaptive phase-shifted synchronization clock generation circuit includes: a current source generating a current which flows through a node to generate a node voltage on the node; a reverse-proportional voltage generator coupled to the node for generating a voltage which is reverse-proportional to the node voltage; a ramp generator receiving a synchronization input signal and generating a ramp signal; a comparator comparing the reverse-proportional voltage to the ramp signal; and a pulse generator for generating a clock signal according to an output from the comparator.
    Type: Grant
    Filed: November 2, 2013
    Date of Patent: April 14, 2015
    Assignee: Richtek Technology Corporation
    Inventors: Isaac Chen, An-Tung Chen
  • Publication number: 20150100174
    Abstract: A passive component with temperature compensation and an electronic device using the same are provided. The electronic device includes a central processor unit (CPU), a filter and a power conversion circuit. The filter includes the passive component and a variable resistor. The passive component includes an inductor and a negative temperature coefficient (NTC) resistor. The NTC resistor is contacted with a surface of the inductor, and the NTC resistor and the inductor are disposed in a package. The power conversion circuit provides a current information to the CPU according to a partial voltage difference of the filter. The power conversion circuit controls an output voltage through the filter according to a first control signal of the CPU, so as to provide the output voltage. The electronic device further includes an embedded controller. The embedded controller controls the variable resistor according to a second control signal of the CPU.
    Type: Application
    Filed: August 29, 2014
    Publication date: April 9, 2015
    Inventors: Po-Yu Li, Kuan-Chi Juan, Meng-Chieh Tsai
  • Patent number: 9000742
    Abstract: A signal generating circuit includes: a first signal amplifying circuit arranged to generate a first amplified signal according to a first supply current, a reference signal, and an output signal of the signal generating circuit; a soft-start circuit arranged to generate a control signal according to a soft-start signal; a current controlled circuit arranged to generate the first supply current according to the soft-start signal; and a pass transistor arranged to generate an output signal according to an error amplified signal and the control signal. The error amplified signal is derived from the first amplified signal.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: April 7, 2015
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Xi Chen, Chien-Wei Kuan
  • Publication number: 20150091537
    Abstract: Reference signal generators using thermistors are disclosed. An apparatus includes a first device having a first temperature coefficient and a thermistor having a second temperature coefficient having a sign opposite to that of the first temperature coefficient. A circuit maintains equivalence of a first signal and a second signal and offsets a first temperature variation of the first device using a second temperature variation of the thermistor to generate the second signal having a low temperature coefficient. The first device may be a bipolar transistor configured to generate a base-emitter voltage and coupled in series with the thermistor. The first signal may be a first voltage on a first node. The second signal may be a second voltage on a second node. The circuit may be configured to maintain effective equivalence of the first voltage and the second voltage. The apparatus may include a resistor coupled to the second node.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 2, 2015
    Applicant: Silicon Laboratories Inc.
    Inventors: Aaron J. Caffee, Brian G. Drost
  • Publication number: 20150077070
    Abstract: A voltage regulator that provides feedforward cancellation of power supply noise is disclosed. The voltage regulator includes a process tracking circuit that receives a supply voltage and generates a proportional voltage. A tracking capacitor is coupled to the process tracking circuit and generates an injection voltage based on the proportional voltage. An Ahuja compensated regulator generates a regulated voltage. The injection voltage is provided on a feedback path of the Ahuja compensated regulator.
    Type: Application
    Filed: July 30, 2014
    Publication date: March 19, 2015
    Inventors: Shuaeb Fazeel, Eeshan Miglani, Visvesvaraya Pentakota, Shagun Dusad
  • Publication number: 20150035507
    Abstract: A dual mode voltage regulator according to one embodiment includes a passive regulator circuit; a switching regulator circuit; and a controller circuit configured to monitor operational parameters of the dual mode voltage regulator and selectively couple either the passive regulator circuit or the switching regulator circuit between an input voltage port and an output load. The selective coupling is based on the monitoring of parameters including current through the output load, voltage at the input voltage port and voltage at the output load as well as the availability of a system clock signal.
    Type: Application
    Filed: December 22, 2011
    Publication date: February 5, 2015
    Inventors: Nicholas P. Cowley, Andrew D. Talbot, Isaac Ali, Keith Pinson, Colin L. Perry, Matthew T. Aitken, Chi Man Kan, Mark S. Mudd, Stephen J. Spinks, Alan J. Martin, William L. Barber
  • Publication number: 20150002110
    Abstract: A method and apparatus are provided. The apparatus comprises a plurality of devices forming a positive feedback loop for driving a regulated output voltage towards a reference voltage. Device ratios of at least two of the plurality of devices are set such that the positive feedback loop is stable.
    Type: Application
    Filed: June 27, 2013
    Publication date: January 1, 2015
    Inventors: Saurabh Kumar Singh, Nitin Bansal, Kallol Chatterjee
  • Publication number: 20150002111
    Abstract: The invention relates to a circuit arrangement for reducing power loss in the case of an active electrical current output of a field device for determining and/or influencing a process variable, wherein the process variable is represented via a selectable electrical current value, comprising an external voltage supply, a voltage regulator and a control loop associated with the voltage regulator, wherein the control loop is so embodied that the voltage regulator, as a function of the presently set electrical current value, so controls the voltage to an external load connected in parallel with the electrical current output that the external load receives essentially only the respectively required voltage.
    Type: Application
    Filed: November 22, 2012
    Publication date: January 1, 2015
    Inventors: Matthias Brudermann, Antoine Simon, Nikolai Fink, Daniel Kollmer, Ole Koudal
  • Publication number: 20150001938
    Abstract: An electronic circuit includes a functional circuit in series with at least one first current source between two terminals of application of a power supply voltage. The first current source is controllable between an operating mode where it delivers a fixed current, independent from the power consumption of said functional circuit, and an operating mode where it delivers a variable current, depending on the power consumption of the functional circuit.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Inventor: Jimmy Fort
  • Publication number: 20140327416
    Abstract: A voltage regulator includes a power device formed by an NMOS transistor having a drain terminal coupled to an input voltage, a source terminal providing an output voltage and a gate terminal receiving a gate drive signal; and an integrated AC/DC control loop configured to access the output voltage and to generate the gate drive signal based on a value of the output voltage in relation to a first reference voltage and a second reference voltage. The AC control portion generates a gate drive control signal which is AC coupled to the gate terminal of the power device as an AC component of the gate drive signal. The DC control portion controls a DC voltage level of the gate drive signal. The AC control portion is powered by the input voltage while the DC control portion is powered by a high supply voltage greater than the input voltage.
    Type: Application
    Filed: May 5, 2014
    Publication date: November 6, 2014
    Applicant: Micrel, Inc.
    Inventors: Rudolf Gerardus van Ettinger, Paul Wilson
  • Publication number: 20140306671
    Abstract: A system can include a device under test (DUT) having a DUT voltage, a cable connected to the DUT, the cable having a cable inductance, and a power supply configured as a current source to provide a wide bandwidth voltage source to the DUT, wherein the DUT voltage is independent of the cable inductance.
    Type: Application
    Filed: April 12, 2013
    Publication date: October 16, 2014
    Applicant: Keithley Instruments, Inc.
    Inventors: Kevin Cawley, Wayne Goeke, Gregory Sobolewski
  • Patent number: 8841891
    Abstract: A multiple output DC-to-DC voltage converter using a new time-multiplexed-capacitor converter algorithm and related circuit topologies is herein disclosed. One embodiment of this invention includes a flying capacitor, a first output node, a second output node, and a switching network. The switching network configured to provide the following modes of circuit operation: 1) a first mode where the positive electrode of the flying capacitor is connected to an input voltage and the negative electrode of the flying capacitor is connected to ground; 2) a second mode where the negative electrode of the flying capacitor is connected to the input voltage and the positive electrode of the flying capacitor is connected to the first output node; and 3) a third mode where the positive electrode of the flying capacitor is connected to ground and the negative electrode of the flying capacitor is connected to the second output node.
    Type: Grant
    Filed: November 11, 2012
    Date of Patent: September 23, 2014
    Assignee: Advanced Analogic Technologies Incorporated
    Inventor: Richard K. Williams
  • Publication number: 20140266087
    Abstract: Among other things, techniques and systems are provided to pre-charge a node of a primary circuit, such as a voltage regulator or bandgap voltage reference, via a start-up circuit. The node is charged to a specified voltage during a pre-charge operation that occurs while the primary-circuit is powered-off. The pre-charge operation comprises discharging a voltage from the node during a first portion of the pre-charge operation and re-charging the node to the specified voltage during a second portion of the pre-charge operation. In some embodiments, the specified voltage is substantially equivalent to a switching voltage of a drive transistor of the primary circuit.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Applicant: Taiwan Semiconductor Manufacturing Company Limited
    Inventor: Chi-Hsiang Weng
  • Publication number: 20140266317
    Abstract: A voltage regulator for controlling an output device in accordance with embodiments includes an error amplifier; a controlled conductance output device; and a load predicting circuit; wherein an output of the error amplifier and an output of the load predicting circuit are summed to control the output device.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Inventor: D.C. Sessions
  • Publication number: 20140253072
    Abstract: A soft-start/soft-stop (SS) controller for a voltage regulator. The SS controller includes a power up/down detector configured to perform at least one selected from a group consisting of detecting a power on condition of the voltage regulator to determine a start-up time period and detecting a power off condition of the voltage regulator to determine a shut-down time period, and a ramped reference voltage signal generator configured to perform at least one selected from a group consisting of increasing a voltage level of a ramped reference voltage signal using a pre-determined ramp-up rate during the start-up time period and decreasing the voltage level of the ramped reference voltage signal using a pre-determined ramp-down rate during the shut-down time period, wherein the ramped reference voltage signal is supplied to the voltage regulator for controlling an output voltage level of the voltage regulator.
    Type: Application
    Filed: March 6, 2013
    Publication date: September 11, 2014
    Applicant: VIDATRONIC, INC.
    Inventors: Faisal Abdellatif Elseddeek Ali Hussien, Mohamed Mostafa Saber Aboudina, Moises E. Robinson
  • Patent number: 8823341
    Abstract: The systems and methods of auto-configurable switching/linear regulation disclosed herein enable a device to operate in both DC-to-DC switching regulation and linear regulation applications. The systems and methods disclosed herein differentiate between switching and linear mode. If the application is for a linear regulator, there will only be a capacitor on the output. If the application is for switching mode regulation, there will be an inductor and a capacitor on the output. Then based on the determination, the mode is selected and the hardware is converted into switching regulator operation or linear regulator operation.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: September 2, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Sudhir Polarouthu, Suresh Mallala, Ranjit Kumar Dash, Sundara Siva Rao Giduturi
  • Publication number: 20140197739
    Abstract: A protection circuit of a DC-DC converter is disclosed. An input terminal of the DC-DC converter receives an input voltage and an output terminal of the DC-DC converter provides an output voltage. The DC-DC converter includes an output stage between the input terminal and the output terminal The protection circuit includes a current sensor, a comparator, a determining circuit, and a protection control circuit. The current sensor provides a sensing signal. The comparator compares a default over-voltage with the sensing signal to provide an over-current control signal. The determining circuit provides a determining control signal. The protection control circuit determines whether to enable a short protection according to the over-current control signal and the determining control signal.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 17, 2014
    Applicant: UPI SEMICONDUCTOR CORP.
    Inventor: Wen-Fu Lu
  • Patent number: 8760131
    Abstract: A voltage regulator includes a power device formed by an NMOS transistor having a drain terminal coupled to an input voltage, a source terminal providing an output voltage and a gate terminal receiving a gate drive signal; and an integrated AC/DC control loop configured to access the output voltage and to generate the gate drive signal based on a value of the output voltage in relation to a first reference voltage and a second reference voltage. The AC control portion generates a gate drive control signal which is AC coupled to the gate terminal of the power device as an AC component of the gate drive signal. The DC control portion controls a DC voltage level of the gate drive signal. The AC control portion is powered by the input voltage while the DC control portion is powered by a high supply voltage greater than the input voltage.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: June 24, 2014
    Assignee: Micrel, Inc.
    Inventors: Rudolf Gerardus van Ettinger, Paul Wilson
  • Patent number: 8760130
    Abstract: The electronic apparatus includes a direct-current voltage generation part that generates a direct-current voltage from a commercial power supply; a switching part that switches between an on-state in which the direct-current voltage from the direct-current voltage generation part is output, and an off-state in which the output of the direct-current voltage is shut down, a control part that controls operation of the direct-current voltage generation part; and a power supply maintaining part connected to the direct-current voltage generation part, the power supply maintaining part instructing the switching part to be in the on-state or the off-state, and consequently, enables provision of a soft-switch electronic apparatus that after recovery of a power failure, automatically returns to a state before occurrence of the power failure.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: June 24, 2014
    Inventor: Hideaki Yamaguchi
  • Publication number: 20140167849
    Abstract: A differential amplification circuit includes a first current control unit configured to control driving current in response to a voltage level difference between first input voltage and second input voltage, a second current control unit configured to control the driving current in response to a voltage level difference between the second input voltage independent from temperature and a temperature voltage depending on the temperature, and a signal output unit configured to generate a detection signal in response to the driving current.
    Type: Application
    Filed: March 16, 2013
    Publication date: June 19, 2014
    Applicant: SK HYNIX INC.
    Inventors: Jae-Boum PARK, Cheol-Hoe KIM