With Reference Voltage Circuitry Patents (Class 323/281)
  • Patent number: 10545523
    Abstract: A load circuit of a low-dropout (LDO) regulator is disclosed herein according to certain aspects. The load circuit includes a field effect transistor having a source coupled to a supply rail, a gate, and a drain coupled to a gate of a pass transistor of the LDO regulator. The load circuit also includes an adjustable voltage source coupled between the drain and the gate of the field effect transistor, and a voltage control circuit configured to detect a change in a current load through the pass transistor, and to adjust a voltage of the adjustable voltage source based on the detected change in the current load.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: January 28, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Zhengzheng Wu, Chao Song
  • Patent number: 10536076
    Abstract: A charge pump control circuit is provided in embodiments of the present disclosure, and the charge pump control circuit includes: a charge pump, having a clock interface; a feedback circuit, configured to sample an output voltage of the charge pump to obtain a sampling voltage; a reference voltage generating circuit, having an output terminal outputting a reference voltage; and a comparator, configured to compare the sampling voltage with the reference voltage; wherein the charge pump control circuit further includes: a logic combination circuit, wherein an input terminal of the logic combination circuit is coupled with an output terminal of the comparator, and the logic combination circuit is configured to generate a clock pulse signal according to a comparison result outputted by the comparator, and the clock pulse signal is transmitted to the clock interface of the charge pump.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: January 14, 2020
    Assignee: Shanghai Huahong Grace Semiconductor Manufacturing Corporation
    Inventors: Wenyi Zhu, Jun Xiao
  • Patent number: 10444031
    Abstract: Provided is a sensor device wherein malfunction due to a negative surge is suppressed. This sensor device is provided with: a sensor element wherein electrical characteristics change corresponding to physical quantities; a signal processing circuit that processes output signals of the sensor element; a first transistor element that supplies currents to the sensor element and the signal processing circuit; a control circuit that controls a base current of the first transistor element; a power supply terminal; and a ground terminal. The sensor device is characterized in that the control circuit is provided with a limiting section that limits a current flowing from the ground terminal toward a base terminal of the first transistor element.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: October 15, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshimitsu Yanagawa, Masahiro Matsumoto, Satoshi Asano, Hiroshi Nakano, Akira Kotabe
  • Patent number: 10419041
    Abstract: Systems, devices and methods are disclosed using a transmitter architecture to keep the transmitter in a deep sleep mode before activation/enabling. The transmitter tag comprises a power-good-detector, a first regulator and a second regulator. The power-good-detector includes a power-good-latch, a ring oscillator and a ripple counter. Upon disconnecting a GPIO pin from the ground, the power-good-latch sends a Bias_EN signal to the regulator. Upon receipt of the Bias_EN signal, the first regulator transmits a wakeup signal to the ring oscillator, which then starts sending the clock signals to the ripple counter. When the counted clock signals reach a threshold value, the ripple counter sends the power-good-digital signal to the flip flops. When the tag is in the reset mode, the power-good-digital signal is also low. When the power-good-digital signal goes from low to high, the tag is out of the reset mode.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: September 17, 2019
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Harish S. Muthali, Kourosh Pahlavan, Ari Vauhkonen
  • Patent number: 10345846
    Abstract: A reference voltage generation circuit (or bandgap circuit) having a flipped-gate transistor is disclosed. A bandgap circuit according to the disclosure includes first, second, third and fourth transistors. The first transistor is a flipped-gate transistor having a gate terminal of an opposite polarity (e.g., an n-channel metal oxide semiconductor, or NMOS, transistor having a gate terminal with a p-type polysilicon implant). The second third and fourth transistors have a corresponding type polysilicon implants (e.g., NMOS transistors having respective gate terminals with an n-type polysilicon implant). The circuit is configured to generate a reference voltage equal to a sum of gate-source voltages of the first and third transistors, minus respective gate-source voltages of the second and fourth transistors.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: July 9, 2019
    Assignee: Apple Inc.
    Inventors: Ryan D. Bartling, Jafar Savoj, Daniel J. Fritchman
  • Patent number: 10284084
    Abstract: A power control circuit provides a supply voltage, and includes a voltage regulating circuit and a signal selecting circuit. The voltage regulating circuit is coupled to a power supply voltage and the output end of the power control circuit, and receives a first control signal for outputting the supply voltage. The signal selecting circuit has a first input end, a second input end and a third input end. The first input end of the signal selecting circuit receives a first input signal, the second input end of the signal selecting circuit receives a second input signal, and the third input end of the signal selecting circuit receives a second control signal. The first input signal is related to the power supply voltage. One of the first input signal and the second input signal is chosen and outputted as the first control signal according to the second control signal.
    Type: Grant
    Filed: December 17, 2017
    Date of Patent: May 7, 2019
    Assignee: RichWave Technology Corp.
    Inventors: Chih-Sheng Chen, Sheng-Tsung Wang
  • Patent number: 10191502
    Abstract: A power supply device for outputting a DC voltage includes: a pair of positive and negative output terminals, a load to which the DC voltage is applied being connected thereto; a detection unit configured to detect a voltage value of the DC voltage output from the output terminals; a setting unit configured to select an instruction value for the DC voltage output from the output terminals from among a plurality of preset instruction values, and set the selected instruction value; and a correction unit configured to increase one of the voltage value detected by the detection unit and the instruction value set by the setting unit, according to an amount by which a current value of a current that flows through the load increases.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: January 29, 2019
    Assignee: Hosiden Corporation
    Inventor: Takashi Muto
  • Patent number: 10177660
    Abstract: In certain aspects, a regulator includes a variable-impedance switch coupled between a supply rail and a circuit block, wherein the variable-impedance switch has an adjustable impedance. The regulator also includes a voltage level comparator configured to compare a block voltage at the circuit block with a reference voltage, and to output a first signal indicating whether the block voltage is higher or lower than the reference voltage based on the comparison. The regulator also includes a slope detector configured to determine whether the block voltage is rising or falling, and to output a second signal indicating whether the block voltage is rising or falling based on the determination. The regulator further includes a controller configured to receive the first signal and the second signal, and to control the impedance of the variable-impedance switch based on the first signal and the second signal.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: January 8, 2019
    Assignee: QUALCOMM Incorporated
    Inventor: Terrence Brian Remple
  • Patent number: 10126773
    Abstract: According one embodiment, a circuit is described comprising a first reference voltage generating circuit comprising an output to provide a first reference voltage and a second reference voltage generating circuit comprising an input receiving a value representative of the first reference voltage, the second reference voltage generating circuit being configured to generate a second reference voltage based on the received value.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: November 13, 2018
    Assignee: Infineon Technologies AG
    Inventors: Maximilian Hofer, Albert Missoni
  • Patent number: 10069409
    Abstract: A distributed voltage regulator includes multiple micro-regulators disposed in a corresponding set of circuit sectors of an integrated circuit. Each micro-regulator provides current to the corresponding circuit sector at a current injection point. The regulator also includes a control module configured to receive feedback signals corresponding to a one or more sense points within each circuit sector and provide a control signal to each micro-regulator. The control module limits load-sharing imbalance within the plurality of micro-regulators. A voltage regulator with multiple sense points includes a micro-regulator that provides current at a current injection point, and a control module that receives feedback signals corresponding to a plurality of sense points and provides a control signal to the micro-regulator. The micro-regulator may comprise a charge pump that provides a local reference voltage that enables the micro-regulator to suppress local voltage drooping during feedback transitions (e.g.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: September 4, 2018
    Assignee: International Business Machines Corporation
    Inventors: John F. Bulzacchelli, Michael A. Sperling, Zeynep Toprak Deniz
  • Patent number: 10025374
    Abstract: An electronic apparatus according to an embodiment of the present disclosure may include an input/output interface, the mode of which can be changed to a data communication mode or a charging mode. An electronic apparatus according to an embodiment of the present disclosure may include: a connector to which an external electronic apparatus having an interface that can be connected to an input/output interface is connected; a power supply unit for supplying power to the external electronic apparatus through a power supply line connected to the connector; a host controller for controlling data transmission from and to the external electronic apparatus; and a mode controlling unit for measuring electric current flowing through the power supply line, changing an operation mode on the basis of a result obtained by comparing the electric current value with a reference value, and controlling operations of the power supply unit and the host controller according to the operation mode.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: July 17, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chahoon Park, Sangju Kim, Kangseok Cho, Jaedeok Cha, Kikwon Bin, Sungyun Jin
  • Patent number: 10019026
    Abstract: A circuit for generating a bandgap voltage includes a circuit module for generation of a base-emitter voltage difference, the circuit module including a pair of PNP bipolar substrate transistors which identify a first current path and a second current path. A first current mirror of an n type is connected between the first and second branches and is further connected via a resistance for adjustment of the bandgap voltage to the second bipolar transistor. A second current mirror of a p type is connected between the first and second branches, and connected so that the current mirrors repeat current of each other. In operation to generate the bandgap voltage, current flows from the supply voltage to ground only through said the first and second bipolar substrate transistors.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: July 10, 2018
    Assignee: STMicroelectronics S.r.l.
    Inventors: Calogero Marco Ippolito, Mario Chiricosta
  • Patent number: 9966847
    Abstract: A circuit includes an input for receiving power from an external power supply, a voltage regulator coupled to the power input and providing regulated voltage to an external circuit and to the power supply control circuit itself, and a first switch coupled between ground and an Enable input of the voltage regulator. A control input of the first switch is coupled to the regulated voltage, such that when the voltage regulator provides regulated voltage, the first switch is closed, coupling the Enable input to ground, keeping the voltage regulator active. A first switching circuit provides manual activation and deactivation of the voltage regulator; a second switching circuit provides automatic activation of the voltage regulator whenever the power input becomes powered. An intervening circuit prevents the second switching circuit from activating the voltage regulator when the first switching circuit has deactivated it, despite the continued presence of the external power supply.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: May 8, 2018
    Assignee: Bose Corporation
    Inventors: Paul G. Yamkovoy, Matthew Neil Ruwe
  • Patent number: 9958890
    Abstract: A regulator circuit includes a voltage regulator having a stability control input and an output for providing a regulated output voltage, an amplifier circuit having an input for receiving an error voltage of the voltage regulator, and an output, and a control circuit having an input coupled to the output of the amplifier and an output coupled to the stability control input of the voltage regulator, such that the regulator stability is maximized while the error voltage is minimized. The voltage regulator includes an LDO voltage regulator, the amplifier circuit includes an operational amplifier circuit, and the control circuit includes a load-sensing or load-replicating circuit.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: May 1, 2018
    Assignee: AEROFLEX COLORADO SPRINGS INC.
    Inventor: Alfio Zanchi
  • Patent number: 9946277
    Abstract: A start-up circuit for a bandgap reference voltage generator circuit, including a first native transistor with a drain connected to a supply voltage of the bandgap reference voltage generator circuit and a source connected to a gate of the first native transistor; a low voltage transistor with a source connected to ground, a drain connected to the source of the first native transistor, and a gate connected to a resistor; a second native transistor with a source connected to the resistor, a gate connected to the source of the first native transistor; a high voltage transistor with a drain connected to a drain of the second native transistor and a source connected to the supply voltage; and a transistor with a gate connected to the gate of the first high voltage transistor and a drain which provides a start-up current for the bandgap reference voltage generator circuit.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: April 17, 2018
    Assignee: AVNERA CORPORATION
    Inventor: Christopher D. Nilson
  • Patent number: 9874889
    Abstract: Aspects of the disclosure provide a regulator circuit including an output circuit, an error detection circuit and an intermediate circuit. The output circuit is configured to receive a first supply voltage, output and regulate a second supply voltage based on a control signal. The error detection circuit is responsive to the first supply voltage, and is configured to compare the second supply voltage with a reference voltage, and generate an error signal with a voltage level that is indicative of a difference between the second supply voltage and the reference voltage. The intermediate circuit is configured to generate a first electrical current based on the error signal and a second electrical current based on the second supply voltage, combine the first electrical current and the second electrical current to generate a third electrical current, and generate the control signal at least partially based on the third electrical current.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: January 23, 2018
    Assignee: Marvell International Ltd.
    Inventors: Xiaoxiao Zhao, Yifeng Huang, Wenrong Qian, Yongxu Wang
  • Patent number: 9871444
    Abstract: Disclosed examples include integrated circuits configurable according to sensed circuit conditions to provide configurable power converter topologies with externally connected circuitry to implement buck, boost, buck-boost, low dropout and/or hot-swap power converters. The ICs include one or more sets of series connected high and low side transistors connected with corresponding IC pads to allow connection to external circuitry to form a particular power converter configuration. The IC includes a control circuit and a configuration circuit to sense a circuit condition of the IC and to configure the control circuit to provide switching control signals to the transistors to implement one of a plurality of power converter topologies.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: January 16, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Chuan Ni, Timothy P. Pauletti
  • Patent number: 9835658
    Abstract: Adjustment of drive control based on a detection voltage of a transformer requires a loop time, and therefore high-speed processing of the adjustment is difficult. A semiconductor integrated circuit device includes a driving circuit that drives a power semiconductor device and a driving capability control circuit that controls a driving capability of the driving circuit. The driving circuit stops driving of the power semiconductor device based on an abnormal current detected from a sense current of the power semiconductor device. The driving capability control circuit controls the driving capability of the driving circuit based on a normal current detected from the sense current of the power semiconductor device.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: December 5, 2017
    Assignee: Renesas Electronics Corporation
    Inventor: Makoto Tsurumaru
  • Patent number: 9753472
    Abstract: Systems and methods relate to extending life of a low-dropout (LDO) voltage regulator. A differential amplifier of the LDO voltage regulator includes switches that can be selectively turned on or off. When the LDO voltage regulator is bypassed or turned off (or not active), a first switch is turned on to selectively couple gates of a first input transistor and a second input transistor of the differential amplifier, to maintain the gates at a same voltage. The first switch is turned off to decouple the gates when the LDO voltage regulator is active. Further, a second switch can be turned on or off to selectively couple or decouple, respectively, the gate of the second input transistor to an output voltage of the LDO voltage regulator, based on whether the LDO voltage regulator is active or not active, respectively.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: September 5, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Burt Lee Price, Dhaval Rajeshbhai Shah, Jonathan Liu
  • Patent number: 9727067
    Abstract: A regulator circuit includes: a regulator part configured to generate a constant internal power supply voltage based on an external power supply voltage; a connection port configured to receive power from the regulator part and to be connected to a connection cable having a predetermined cable resistance, the connection cable is configured to electrically connect the connection port to an external device; a current detecting part configured to detect a power supply current when the connection cable is connected to the connection port; and a voltage compensation part configured to compensate a voltage corresponding to a voltage drop due to the cable resistance according to a current value detected by the current detecting part.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: August 8, 2017
    Assignee: ROHM CO., LTD.
    Inventors: Akira Fujiwara, Takashi Kimura
  • Patent number: 9720428
    Abstract: Provided is a voltage regulator having excellent transient response characteristics. The voltage regulator includes: a first switch connected between a gate of an output transistor and a phase compensation capacitor; a voltage follower having an input terminal connected to an output terminal of a differential amplifier; a second switch connected between an output terminal of the voltage follower and the phase compensation capacitor; and a comparator configured to compare a reference voltage and a feedback voltage. The first switch and the second switch are controlled with an output signal of the comparator.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: August 1, 2017
    Assignee: SII Semiconductor Corporation
    Inventor: Teruo Suzuki
  • Patent number: 9674913
    Abstract: A lighting device of an automotive light comprising light sources supplied by a drive current and a control device comprising a control stage generating a control signal on the basis of the difference between the drive current and a predetermined reference current, and a driving stage, which adjust the drive current on the basis of the control signal. The driving stage comprises a voltage stabilizing device, which supplies, in a first operation condition, a stabilized voltage on an intermediate node thereof, a first transistor having a control terminal receiving the control signal; and a second transistor having a control terminal connected to the intermediate node to be set, in the first operation condition, to the predetermined stabilized voltage), a first terminal connected to the light source, and a second terminal connected to a second terminal of the first transistor.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: June 6, 2017
    Assignee: Automotive Lighting Italia S.p.A.
    Inventors: Matteo Iellina, Andrea Englaro, Stefano Marchesin
  • Patent number: 9671800
    Abstract: A temperature corrected voltage bandgap circuit is provided. The circuit includes first and second diode connected transistors. A first switched compare circuit is coupled to the one transistor to inject or remove a first current into or from the transistor. The first current is selected to correct for curvature in the output voltage of the bandgap circuit at one of hotter or colder temperatures.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: June 6, 2017
    Assignee: OL Security Limited Liability Company
    Inventor: David Cave
  • Patent number: 9608569
    Abstract: A method and apparatus for linearizing a baseband filter are provided. The apparatus is configured to, via a first conducting module, receive a first current signal. The apparatus is further configured to, via a converting module, receive a second current signal, generate a voltage signal based on the second current signal, and apply the voltage signal to the first conducting module. An amount of the second current signal received by the converting module is based on an amount of the first current signal flowing through the first conducting module. The apparatus is also configured to, via a second conducting module, control an output current signal based on the voltage signal. The output current signal is controlled to be a linear replica of the first current signal for in-band frequencies.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: March 28, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Bhushan Shanti Asuri, Alok Prakash Joshi, Gireesh Rajendran
  • Patent number: 9577521
    Abstract: A circuit for controlling a switch in a power converter in which peak current is regulated to achieve a specified average current through a load. Control logic is operable to monitor a voltage across a sensing resistor such that when the voltage across the sensing resistor reaches or exceeds a threshold value, the control logic generates a signal that causes a switch to be turned OFF.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: February 21, 2017
    Assignee: Atmel Corporation
    Inventors: Charles Cai, Wai-Keung Peter Cheng
  • Patent number: 9545006
    Abstract: A system board includes at least one microprocessor coupled to the system board. A first circuit board region is populated with a first model voltage regulator circuit. The first model voltage regulator circuit is configured to provide electrical power to the at least one microprocessor. A second circuit board region is unpopulated and configured to receive a second model voltage regulator circuit.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: January 10, 2017
    Assignee: EMC IP Holding Company LLC
    Inventors: John Blondin, Ralph C. Frangioso, Joseph P. King, Jr., Stephen E. Strickland, David C. Bisbee
  • Patent number: 9509215
    Abstract: A circuit for generating an output current includes a control signal generating circuit that is configured to generate a control signal. The control signal is a function of a level of an analog input voltage signal, and a level of the output current is a function of a level of an analog input current signal and the level of the analog input voltage signal.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: November 29, 2016
    Assignee: Cree, Inc.
    Inventors: Michael Walters, Qingcong Hu
  • Patent number: 9454172
    Abstract: There is provided a voltage control circuit that is applicable to a LED device, a power supply or the like. The voltage control circuit includes: a voltage dividing unit dividing a supply voltage into a first voltage and a second voltage different from each other; a shunt regulator adjusting the first voltage according to the second voltage; and an output circuit unit outputting the voltage regulated by the shunt regulator.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: September 27, 2016
    Assignee: SOLUM CO., LTD.
    Inventors: Ki Hong Kim, Min Jin Kim, Byoung Woo Ryu, Heung Gyoon Choi
  • Patent number: 9411348
    Abstract: A low-dropout (LDO) regulator includes a voltage reference circuit to provide a reference voltage, a pass device including an input terminal coupled to a voltage input, an output terminal to provide an output voltage and a control terminal, and an error amplifier including a first amplifier input for receiving the reference voltage, a second amplifier input, an amplifier output coupled to the control terminal of the pass device. Additionally, the LDO regulator includes a feedback circuit including a feedback input coupled to the output terminal of the pass device and a feedback output coupled to the second amplifier input to provide a feedback signal. The LDO regulator further includes a control circuit including a non-volatile memory to store configuration data to control operation of the voltage reference circuit, the pass device, the error amplifier, and the feedback circuit to produce the output voltage.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: August 9, 2016
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Radu H. Iacob, Cornel D. Stanescu, Adrian M. Tache, Sabin A. Eftimie
  • Patent number: 9372489
    Abstract: Provided is a voltage regulator including a leakage current sink circuit capable of suppressing an influence of a leakage current of an output transistor at high temperature, and reducing power consumption of the voltage regulator at normal temperature. The voltage regulator includes: a reference voltage circuit configured to output a reference voltage; an output transistor configured to output an output voltage; a voltage divider circuit configured to divide the output voltage to output a feedback voltage; an error amplifier circuit configured to amplify a difference between the reference voltage and the feedback voltage, and output the amplified difference to control a gate of the output transistor; and a leakage current sink circuit connected to an output terminal and configured to be prevented from operating at normal temperature, and suppress an influence of a leakage current from the output transistor only at high temperature.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: June 21, 2016
    Assignee: SII SEMICONDUCTOR CORPORATION
    Inventors: Yuji Kobayashi, Teruo Suzuki
  • Patent number: 9323257
    Abstract: A voltage conversion circuit may include a first reference voltage generation block configured to be provided with an external voltage, and generate a first reference voltage; a second reference voltage generation block configured to be provided with the external voltage and generate a second reference voltage according to a standby trim code; a trim code generation block configured to generate the standby trim code according to levels of the first reference voltage and the second reference voltage; and an internal voltage generation block configured to select the first reference voltage or the second reference voltage as a determined reference voltage according to an operation mode of a semiconductor memory apparatus, and to generate an internal voltage from the external voltage.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: April 26, 2016
    Assignee: SK hynix Inc.
    Inventor: Sang Oh Lim
  • Patent number: 9323261
    Abstract: An internal voltage generating apparatus is provided. A regulating unit detects whether an internal voltage is lower than a threshold voltage, and outputs a compensation current provided by a first power pad to a second power line connected with a second power pad when the internal voltage is lower than the threshold voltage, so as to regulate the internal voltage provided by the internal voltage generating apparatus.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: April 26, 2016
    Assignee: Winbond Electronics Corp.
    Inventors: Chih-Feng Lin, Kuen-Huei Chang
  • Patent number: 9263099
    Abstract: A semiconductor memory device includes a standby voltage providing unit. The standby voltage providing unit is configured to receive an external voltage, primarily clamp and secondarily clamp a predetermined voltage, and provide the predetermined voltage as an internal voltage, during a standby mode.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: February 16, 2016
    Assignee: SK Hynix Inc.
    Inventor: Tae Heui Kwon
  • Patent number: 9188998
    Abstract: In a constant voltage circuit including: an error amplifier circuit amplifying a difference voltage between an output voltage and a reference voltage; and an output transistor controlling the output voltage based on an output of the error amplifier circuit, a voltage proportional to a leakage current detected by a monitoring transistor is generated by an oscillation circuit and a charge pump circuit and is supplied to a back gate of the output transistor.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: November 17, 2015
    Assignee: SOCIONEXT INC.
    Inventors: Yuma Yano, Akimitsu Tajima, Hideaki Kondo
  • Patent number: 9059699
    Abstract: Provided is a power supply switching circuit capable of suppressing a load fluctuation such as undershoot that occurs at an output terminal at the time of power supply switching. The power supply switching circuit includes: a battery connected to the output terminal; a replica current generation circuit for generating a replica current that is proportional to a current flowing from the battery to the output terminal; a voltage regulator connected to the output terminal, the voltage regulator including a reference voltage circuit, an error amplifier circuit, an output transistor, and a voltage divider circuit; and a current mirror circuit for causing the replica current to flow through the output transistor of the voltage regulator.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: June 16, 2015
    Assignee: Seiko Instruments Inc.
    Inventors: Tsutomu Tomioka, Atsushi Igarashi, Masakazu Sugiura
  • Patent number: 9041369
    Abstract: A voltage regulator compensation circuit provides power to a dynamic load and includes a power transistor configured to drive the dynamic load, a reference determining transistor configured to establish a voltage reference proportional to a regulated output voltage of the power transistor, and a control circuit coupled to a gate input of both the power transistor and the reference determining transistor. Also included is a comparison engine configured to compare the regulated output voltage and the voltage reference, and a current consuming transistor operatively coupled to an output of the power transistor and configured to provide a varying secondary load. The comparison engine is configured to control the current consuming transistor to increase current draw or decrease current draw from the power transistor based on the difference between the regulated output voltage and the voltage reference.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: May 26, 2015
    Assignee: SanDisk Technologies Inc.
    Inventors: Elkana Richter, Yossi Hassan, Tomer Elran
  • Publication number: 20150130435
    Abstract: A timing controlled converter and method for converting a time varying input signal to a regulated DC output voltage for application to a load circuit. A feedback loop is employed as a control means for switchably coupling the time varying input signal to the load circuit for controlled periods of time in a manner so as to provide an average load voltage equal to a reference voltage. The duration of the controlled periods of time is a function of: the difference between the time varying input signal and the output voltage; and the integral of the difference between the output voltage and the reference voltage.
    Type: Application
    Filed: January 19, 2015
    Publication date: May 14, 2015
    Applicant: ALFRED E MANN FOUNDATION FOR SCIENTIFIC RESEARCH
    Inventor: EDWARD K. F. LEE
  • Publication number: 20150123635
    Abstract: A voltage regulator apparatus and an associated method are provided, where the voltage regulator apparatus includes: a voltage regulator module for regulating an input voltage according to a bandgap reference voltage to generate an output voltage; and a plurality of sensing modules. Ina situation where the output voltage abruptly decreases, a sensing module reduces, based on a variation amount of the output voltage, a decrement of the output voltage. In a situation where the output voltage abruptly increases, another sensing module reduces, based on another variation amount of the output voltage, an increment of the output voltage. In addition, yet another sensing module senses variation of the output voltage, converts the variation of the output voltage into a current signal, and applies the current signal to a control terminal within the voltage regulator module to indirectly control the output voltage.
    Type: Application
    Filed: March 11, 2014
    Publication date: May 7, 2015
    Inventors: San-Yueh Huang, Wei-Lun Chen, Xiao-Dong Fei
  • Patent number: 9018924
    Abstract: Aspects are directed to low dropout regulation. In accordance with one or more embodiments, an apparatus includes a charge pump that generates an output using a reference voltage, a low dropout (LDO) regulator circuit, current-limit and a voltage-limit circuit. The LDO circuit includes an amplifier powered by the charge pump and that provides an LDO voltage output. The voltage-limit circuit includes a transistor coupled between a voltage supply line and the LDO regulator circuit and a gate driven by the charge pump. The voltage-limit circuit limits voltage coupled between the voltage supply line and the LDO regulator circuit based upon the output of the charge pump, such as by coupling the voltage at the voltage supply line via source/drain connection of the transistor under low-voltage conditions, and providing a limited voltage to the LDO regulator circuit under high voltage conditions on the voltage supply line.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: April 28, 2015
    Assignee: NXP B.V.
    Inventor: Madan Mohan Reddy Vemula
  • Patent number: 9018576
    Abstract: Disclosed is a low drop-out voltage regulator circuit with a distributed output network coupled to a pixel array for use in image sensor circuitry. The regulator circuit comprises voltage regulating circuitry and a distributed output network, wherein the distributed output network comprises drive transistors disposed along and connected between a supply track and an output track. The spatial distribution of the drive transistors improves heat dissipation within the regulator circuit, and a combination of low current flow and regulated output voltage reduces IR drop across the output track. The improved heat dissipation increases device lifespan and performance, whereas the reduction in IR drop across the output track provides better pixel response, readout uniformity, and image quality.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: April 28, 2015
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Jingfeng Gong, Yann Desprez-le-Goarant
  • Publication number: 20150102791
    Abstract: The present disclosure describes a circuit for managing power and heat. The circuit includes a voltage regulator, and a calibration module comprising logic, at least partially comprising hardware logic. The calibration module is configured to identify a first voltage of the circuit when a current is not provided to the voltage regulator, and determine a second voltage of the circuit when a current is provided to the voltage regulator during a reset sequence. The calibration module is further configured to compare the first voltage to the second voltage.
    Type: Application
    Filed: December 19, 2014
    Publication date: April 16, 2015
    Applicant: INTEL CORPORATION
    Inventors: Nazar S. Haider, Hendra Rustam
  • Publication number: 20150097541
    Abstract: An apparatus and method for a linear voltage regulator with improved voltage regulation is disclosed. A linear voltage regulator device with improved voltage regulation that combines good resiliency to noisy ground reference, high Power Supply Rejection Ratio (PSRR), good current load regulation with changes in the current load and good feedback loop stability. The linear voltage regulator comprises of an amplifier, a current source, a pass gate, a current load, a first feedback loop, a second feedback loop, a second amplifier and second pass gate. A second feedback loop is formed to control the bias of the first feedback loop.
    Type: Application
    Filed: October 14, 2013
    Publication date: April 9, 2015
    Applicant: Dialog Semiconductor GmbH
    Inventor: Franck Banag
  • Publication number: 20150095668
    Abstract: An internal voltage generation circuit includes a bulk voltage generator and an internal voltage driver. The A bulk voltage generator is configured to output any one of a power supply voltage signal and a core voltage signal as a first bulk voltage signal and any one of a ground voltage signal and a low voltage signal as a second bulk voltage signal. An internal voltage driver receives the first and second bulk voltage signals to pull down an internal voltage signal when a level of the internal voltage signal is higher than a level of an upper limit reference voltage signal and to pull up the internal voltage signal when a level of the internal voltage signal is lower than a level of a lower limit reference voltage signal.
    Type: Application
    Filed: February 7, 2014
    Publication date: April 2, 2015
    Applicant: SK hynix Inc.
    Inventor: Young Kyoung CHOI
  • Publication number: 20150091542
    Abstract: There is provided a regulator circuit capable of increasing the capacity of the output transistor for supplying current, stably generating an internal power supply voltage and adapting to the reduction of a power supply voltage. The regulator circuit includes an output transistor which is supplied with an external power supply voltage and supplies dropped voltage to an internal circuit, a differential amplifier for outputting a gate potential applied to the gate of the output transistor, a reference voltage generating circuit for supplying a reference voltage to the differential amplifier, and a cut-off transistor for turning off the output transistor to stop supplying power to the internal circuit. The output transistor is comprised of a depression NMOS transistor whose threshold voltage is a negative voltage. The regulator circuit further includes substrate potential control means for controlling the substrate potential of the depression NMOS transistor.
    Type: Application
    Filed: December 8, 2014
    Publication date: April 2, 2015
    Inventor: Hiromi NOTANI
  • Publication number: 20150084895
    Abstract: The present invention discloses a load driving circuit, comprising a voltage differential generation circuit and a common mode voltage generation circuit; wherein the voltage differential generation circuit is configured to generate a driving voltage for driving a load; and the common mode voltage generation circuit is configured to: when the voltage differential generation circuit generates the driving voltage for driving the load, regulate the voltages output by a first output terminal and a second output terminal of the voltage differential generation circuit to the same voltage value. The present invention also provides a load driving method and application devices thereof. With the technical solutions according to the present invention, a central value of a voltage output by the first output terminal and a voltage output by the second output terminal of the voltage differential generation circuit is effectively regulated.
    Type: Application
    Filed: September 16, 2014
    Publication date: March 26, 2015
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Lei HUANG, Na MENG, ZhaoHong LI
  • Publication number: 20150084610
    Abstract: Embodiments of signal bias generators and regulators are described generally herein. Other embodiments may be described and claimed.
    Type: Application
    Filed: August 18, 2014
    Publication date: March 26, 2015
    Inventors: Tae Youn Kim, Robert Mark Englekirk
  • Publication number: 20150077077
    Abstract: A voltage generating apparatus according to an embodiment of the present invention includes a voltage regulator determining a pass voltage at a pass node by comparing an output voltage at an output node with a reference voltage, and generating the output voltage by transferring an external power supply voltage to the output node in response to the pass voltage at the pass node, and a voltage stabilizer controlling a first current flowing from the pass node and a second current flowing from the output node in response to the output voltage.
    Type: Application
    Filed: March 24, 2014
    Publication date: March 19, 2015
    Applicant: SK hynix Inc.
    Inventor: Hyun Tae LEE
  • Patent number: 8970190
    Abstract: A common (ground) of a low voltage regulator is connected to a virtual common (ground) of an integrated circuit device that is also connected to transistor sources but isolated from a true ground connected to the substrate of the integrated circuit device. The regulated output voltage from the low voltage regulator rises the same as the virtual ground voltage rises when back-biased sufficient to reduce leakage current to an acceptable level in a given process technology. Therefore, the output of the low voltage regulator will maintain a normal operating voltage for the logic during a power saving back-biased condition.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: March 3, 2015
    Assignee: Microchip Technology Incorporated
    Inventors: James Muha, Tim Wilson, D C Sessions, Yong Yuenyongsgool
  • Publication number: 20150042301
    Abstract: An embodiment of an arrangement includes a voltage regulator configured to provide an output voltage, said voltage regulator configured to receive one of a plurality of different regulator reference voltages and a controller configured to provide a selection signal, said selection signal being used to control which of said regulator reference voltages said voltage regulator receives.
    Type: Application
    Filed: August 9, 2013
    Publication date: February 12, 2015
    Applicant: STMicroelectronics International N.V.
    Inventor: Rajesh NARWAL
  • Patent number: 8922176
    Abstract: An apparatus is configured to provide a voltage rising at the output with a programmable slew rate. The apparatus comprises a ramp-up control circuit module for supplying an increasing output voltage that is output to a load circuit. The ramp-up control circuit comprises an amplifier that receives the output of a plurality of selectable mirrored current sources that build up voltage across a capacitor for programming a selected linear slew rate for the increasing output voltage. The apparatus further comprises a glitch filter circuit for stabilizing the increasing output voltage so as to minimize glitches, including current and voltage stress, in the output voltage.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: December 30, 2014
    Assignee: SanDisk Technologies Inc.
    Inventors: Alexander Tetelbaum, Tomer Shaul Elran