With Reference Voltage Circuitry Patents (Class 323/281)
  • Patent number: 11921534
    Abstract: Various aspects relate to a startup circuit for a bandgap reference circuit, wherein a target voltage value is associated with the bandgap reference circuit, the target voltage value being indicative of a startup condition of the bandgap reference circuit that triggers a stable on-state of the bandgap reference circuit, wherein the startup circuit is configured to: provide a startup voltage at the bandgap reference circuit to trigger a start of an operation of the bandgap reference circuit; receive a feedback voltage, wherein the feedback voltage is representative of a startup condition of the bandgap reference circuit; and either increase the startup voltage at the bandgap reference circuit in the case that a voltage value of the feedback voltage is less than the target voltage value, or stop providing the startup voltage at the bandgap reference circuit in the case that the voltage value of the feedback voltage is equal to or greater than the target voltage value.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: March 5, 2024
    Assignee: FERROELECTRIC MEMORY GMBH
    Inventor: Rashid Iqbal
  • Patent number: 11841722
    Abstract: A controlling circuit for a low-power low dropout regulator includes the low-power low dropout regulator, a current load detector and a bias current circuit. The low-power low dropout regulator has a first transmitting terminal and a second transmitting terminal. The first transmitting terminal is configured to transmit a first voltage, the second transmitting terminal is configured to transmit a second voltage, and the low-power low dropout regulator adjusts a voltage difference between the first voltage and the second voltage. The current load detector detects the first voltage and the second voltage, and compares the reference voltage with the second voltage to generate a detected signal. The bias current circuit generates a bias voltage and a reference current, and the low-power low dropout regulator dynamically adjust a bias current of the low-power low dropout regulator, so that the bias current is positively correlated with the reference current.
    Type: Grant
    Filed: May 4, 2022
    Date of Patent: December 12, 2023
    Assignee: INTEGRATED SILICON SOLUTION INC.
    Inventor: Shuenrun Seara Jian
  • Patent number: 11755045
    Abstract: An internal voltage generation circuit includes a shifting source voltage generation circuit configured to generate a shifting source voltage having a voltage level that falls as a voltage level of a power supply voltage rises during a period when the power supply voltage is lower than a preset voltage level. The internal voltage generation circuit also includes an internal voltage regulator configured to generate a driving signal through a level shifting operation that is performed according to the shifting source voltage received when driving an internal voltage and configured to drive the internal voltage based on the driving signal.
    Type: Grant
    Filed: August 5, 2022
    Date of Patent: September 12, 2023
    Assignee: SK hynix Inc.
    Inventors: Jin Hoon Hyun, Chang Hyun Lee
  • Patent number: 11610636
    Abstract: Provided herein is a memory device and a method of operating the memory device. The memory device includes: a reference voltage generation circuit configured to generate a standby mode reference voltage in a standby mode, and generate and output an active mode reference voltage in an active mode; and an internal voltage generation circuit configured to receive the standby mode reference voltage or the active mode reference voltage from the reference voltage generation circuit, and generate an internal voltage. When an error is detected from the internal voltage generated in the standby mode, the reference voltage generation circuit may generate and output the active mode reference voltage.
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: March 21, 2023
    Assignee: SK hynix Inc.
    Inventor: Myung Hwan Lee
  • Patent number: 11561563
    Abstract: A supply-glitch-tolerant voltage regulator includes a regulated voltage node and an output transistor having a source terminal, a gate terminal, and a drain terminal. The source terminal is coupled to the regulated voltage node. The supply-glitch-tolerant voltage regulator includes a first current generator coupled between a first node and a first power supply node. The supply-glitch-tolerant voltage regulator includes a second current generator coupled between the first node and a second power supply node. The supply-glitch-tolerant voltage regulator includes a feedback circuit coupled to the first current generator and the second current generator and is configured to adjust a voltage on the first node based on a reference voltage and a voltage level on the regulated voltage node. The supply-glitch-tolerant voltage regulator includes a diode coupled between the drain terminal and the first power supply node and a resistor coupled between the gate terminal and the first node.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: January 24, 2023
    Assignee: Skyworks Solutions, Inc.
    Inventors: Viktor Zsolczai, András V. Horváth, Péter Onódy
  • Patent number: 11501092
    Abstract: This application relates to computing circuitry, and in particular to analogue computing circuitry suitable for neuromorphic computing. An analogue computation unit for processing data is supplied with a first voltage from a voltage regulator which is operable in a sequence of phases to cyclically regulate the first voltage. A controller is configured to control operation of the voltage regulator and/or the analogue computation unit, such that the analogue computation unit processes data during a plurality of compute periods that avoid times at which the voltage regulator undergoes a phase transition which is one of a predefined set of phase transitions between defined phases in said sequence of phases. This avoids performing computation operations during a phase transition of the voltage regulator that could result in a transient or disturbance in the first voltage, which could adversely affect the computing.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: November 15, 2022
    Assignee: Cirrus Logic, Inc.
    Inventor: John Paul Lesso
  • Patent number: 11476756
    Abstract: A circuit device includes a pulse signal output circuit and a driving circuit. The pulse signal output circuit, when a detection voltage has decreased below a reference voltage, changes a pulse signal to an active level at which a switching element is turned on. The pulse signal output circuit, after the detection voltage has decreased below the reference voltage, performs monitoring as to whether or not the detection voltage has exceeded the reference voltage, and upon detecting that the detection voltage has exceeded the reference voltage, changes the pulse signal to an inactive level at which the switching element is turned off. The driving circuit outputs a driving signal based on the pulse signal to the switching element.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: October 18, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Makoto Katase, Haruo Hayashi, Motoaki Nishimura, Yusuke Sano, Yoshifumi Sakamoto
  • Patent number: 11435768
    Abstract: A voltage regulator includes two input pairs of opposite type transistors, p-type and n-type, to provide a soft-start functionality for gradually increasing the voltage regulator's output voltage from zero, or a voltage below the thresholds of the n-type transistors, to an operational voltage. The voltage regulator operates in a soft-start mode during which a variable input voltage signal is ramped up to allow the output voltage to reach the operational voltage, and a normal-operation mode during which the operational voltage is maintained.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: September 6, 2022
    Assignee: STMicroelectronics (China) Investment Co. Ltd
    Inventors: Zhenghao Cui, Fei Wang, Ming Jiang
  • Patent number: 11320849
    Abstract: A voltage regulator circuit may generate a regulated voltage level using a voltage level of a feedback node. The regulated voltage level may be distributed, via a power distribution network, to package power supply node of a package, into which an integrated circuit has been mounted. Power switches included in the integrated circuit may couple the package power supply node to respective local power supply nodes in the integrated circuit. A particular power switch may selectively couple different ones of the local power supply nodes to the feedback node, allowing the voltage regulator circuit to compensate for reductions in the regulated voltage level due to the power distribution network, as well as adjust the regulated voltage level based on power consumptions of load circuits coupled to the local power supply nodes.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: May 3, 2022
    Assignee: Apple Inc.
    Inventors: Shawn Searles, Victor Zyuban, Mohamed Abu-Rahma
  • Patent number: 11302400
    Abstract: A semiconductor device includes a first transistor; a first resistor; a second resistor; a first circuit configured to apply a first voltage to the first transistor. The first voltage is based on a difference between a reference voltage and an output voltage divided by the first and second resistors. A first current through the first circuit in a first mode is less than a second current through the first circuit in a second mode. The semiconductor device includes a capacitor connected to the output terminal; and a second circuit connected to the capacitor that: (a) disconnects the first circuit from the capacitor and apply a second voltage to the capacitor in a first mode, and (b) electrically connects the first circuit to the capacitor in the second mode.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: April 12, 2022
    Assignee: KIOXIA CORPORATION
    Inventor: Takayuki Tsukamoto
  • Patent number: 11173584
    Abstract: A power tool is provided including a brushless DC (BLDC) motor, a rectifier that receives an alternative current from a power supply and outputs a rectified signal supplied to a DC power bus, and an inverter circuit having motor switches connected electrically between the DC power bus and the motor. A control module controls a switching operation of the power switches to regulate supply power from the power supply to the motor. The control module controls the switching operation so as to, within a half cycle of the AC power supply voltage waveform, increase current draw from the power supply from a first threshold at or after a first zero-crossing of the half cycle up to a second threshold, and reduce current draw from the power supply from the second threshold up to a third threshold at or prior to a second zero-crossing of the half cycle.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: November 16, 2021
    Assignee: Black & Decker Inc.
    Inventors: Alexander Manasseh, Scott J. Eshleman, Robert A. Usselman, John D. Cox
  • Patent number: 11114865
    Abstract: Desk top items with LEDs also include USB-unit(s) or USB-module(s) and, optionally, additional outlet-units, to supply charging power to other electric or digital devices such as a smart phone or digital data device. The USB-unit(s) or USB-module(s) are arranged to supply power only, and do not have an additional USB data transfer function.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: September 7, 2021
    Inventor: Tseng-Lu Chien
  • Patent number: 11048321
    Abstract: Digital low-dropout micro voltage regulator configured to accept an external voltage and produce a regulated voltage. All active devices of the voltage regulator are digital devices. All signals of the voltage regulator, except the first voltage and the regulated voltage, may be characterized as digital signals. Some active devices of the voltage regulator may be physically separated from other active devices of the voltage regulator by active devices of non-voltage regulator circuitry.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: June 29, 2021
    Assignee: NVIDIA CORPORATION
    Inventors: Siddharth Saxena, Tezaswi Raja, Fei Li, Wen Yueh
  • 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: 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: 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: 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