To Derive A Voltage Reference (e.g., Band Gap Regulator) Patents (Class 323/313)
  • Patent number: 10707870
    Abstract: An object of the present invention is to reduce a chip area of the high-side driver circuit. A high-side driver circuit of the present invention is a high-side driver circuit in which a first potential is set as a power supply potential, which includes a constant voltage circuit configured to operate with a second potential as a reference potential, and generate, from the first potential, a third potential which is lower than the first potential and higher than the second potential, a logic circuit configured to operate with the third potential as a reference potential, a level shift circuit configured to shift the reference potential of the output signal of the logic circuit from the third potential to the second potential, and a driver circuit in which the second potential is set as a reference potential, and configured to drive a switching element by the output signal.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: July 7, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuya Hokazono, Dong Wang, Jun Fukudome
  • Patent number: 10706788
    Abstract: The present disclosure relates to a compensation method and a compensation apparatus for an OLED pixel and a display apparatus, which relates to the field of display technology. The compensation method for an OLED pixel includes: acquiring a threshold voltage of a driving transistor; acquiring a mobility of the driving transistor according to the threshold voltage of the driving transistor; and compensating the OLED pixel according to the mobility of the driving transistor.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: July 7, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yi Chen, Min He
  • Patent number: 10705553
    Abstract: A constant current circuit includes a first current mirror circuit connected to a first power supply and having a first input transistor and a first output transistor of a first conductivity type, a second current mirror circuit having a second output transistor of a second conductivity type provided between the first input transistor and a second power supply, and a second input transistor of the second conductivity type provided between the first output transistor and the second power supply, a resistor interposed between the second output transistor and the second power supply, and a capacitor having one end connected to the first power supply and the other end connected to a connecting point of the second output transistor and the resistor.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: July 7, 2020
    Assignee: Ablic Inc.
    Inventor: Kaoru Sakaguchi
  • Patent number: 10700644
    Abstract: Briefly, embodiments of claimed subject matter relate to determination of a high-impedance state or a low-impedance state of a resistive memory element over a wide range of temperature, such as temperatures approaching ?40.0° C. to temperatures approaching +125.0° C. Such determination may be brought about by implementing a circuit which, according to various embodiments described herein, emulates a reference impedance having a negative temperature coefficient.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: June 30, 2020
    Assignee: Arm Limited
    Inventor: El Mehdi Boujamaa
  • Patent number: 10684637
    Abstract: a reference voltage generating circuit that includes a bandgap reference voltage generating circuit main body (10) configured to generate a substantially constant reference voltage at room temperature, a high temperature correction circuit (30) configured to increase a reference voltage generated by the reference voltage generating circuit main body at a high temperature by supplying a high temperature correction current that increases as the temperature increases to the resistor, a low temperature correction circuit (40) configured to increase a reference voltage generated by the reference voltage generating circuit main body at a low temperature by supplying a low temperature correction current that increases as the temperature decreases to the resistor, and a bias circuit (20) configured to generate a bias voltage according to the temperature, so as to control the high temperature correction current and the low temperature correction current at the same time.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: June 16, 2020
    Assignee: NEW JAPAN RADIO CO., LTD.
    Inventor: Haruhiko Yoshida
  • Patent number: 10680517
    Abstract: A reconfigurable voltage regulator for use in a system having a multiple power domains includes a power detecting circuit and a charge pump. The power detecting circuit is coupled to a power supply and configured to partition a power range of the power supply into multiple voltages zones corresponding to the multiple power domains of the system and provide a pump enable signal associated with a specific power domain among the multiple power domains. The charge pump includes multiple pump stages arranged in a matrix, wherein each pump stage is activated or deactivated according to a corresponding bit of the pump enable signal.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: June 9, 2020
    Assignee: Yangtze Memory Technologies Co., Ltd.
    Inventor: Liang Qiao
  • Patent number: 10678284
    Abstract: Apparatuses and methods for providing a current independent of temperature are described. An example apparatus includes a current generator that includes two components that are configured to respond equally and opposite to changes in temperature. The responses of the two components may allow a current provided by the current generator to remain independent of temperature. One of the two components in the current generator may mirror a component included in a voltage source that is configured to provide a voltage to the current generator.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: June 9, 2020
    Assignee: Micron Technology, Inc.
    Inventor: Wei Lu Chu
  • Patent number: 10671104
    Abstract: Signal-generation circuitry comprises: a differential amplifier comprising first and second input transistors, connected along respective current paths and having control terminals serving as corresponding first and second input terminals of the differential amplifier, and an output terminal at which an amplified signal is output dependent on input signals received at the input terminals; bandgap voltage reference circuitry comprising the first input transistor and a third input transistor whose control terminals are connected together to form a reference terminal at which a bandgap voltage reference signal is generated as a first input signal; and a regulation stage connected to receive the amplified signal output from the differential amplifier and configured to generate a voltage-regulated signal based thereon, and connected to the second input terminal of the differential amplifier so that the second input signal is a feedback signal dependent on the voltage-regulated signal.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: June 2, 2020
    Assignee: SOCIONEXT INC.
    Inventor: David Hany Gaied Mikhael
  • Patent number: 10671108
    Abstract: A bandgap reference circuit and method of using the same are provided. The bandgap reference circuit includes a startup component; an output component; and a bandgap core component coupled there-between. The bandgap core component includes a reference point having a voltage associated with an output signal of the output component. A controller is configured for controlling the bandgap core component and the output component to switch between a low power consumption mode and a normal operation mode based on the voltage at the reference point. When the bandgap core component and the output component operate in the normal operation mode, the bandgap reference circuit outputs a stable voltage and has a first power consumption. When the bandgap core component and the output component operate in the low power consumption mode, the bandgap reference circuit has a second power consumption less than the first power consumption.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: June 2, 2020
    Assignees: Semiconductor Manufacturing International (Shanghai) Corporation, Semiconductor Manufacturing International (Beijing) Corporation
    Inventors: Josh Yang, Zhi Bing Deng, Cheng Tai Huang, Cheng Yi Huang, Wen Jun Weng, Jun Tao Guo
  • Patent number: 10648870
    Abstract: Disclosed is a temperature sensor including a first current generator configured to generate a proportional to absolute temperature (PTAT) current, a second current generator configured to generate an inverse PTAT (IPTAT) current, the PTAT current and IPTAT current being combined to form a reference current having a sensitivity relative to temperature, a plurality of current mirrors to adjust the sensitivity and gain of the reference current, and a variable resistor to set an output calibration voltage based on the generated current.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: May 12, 2020
    Assignee: NXP USA, Inc.
    Inventors: Birama Goumballa, Didier Salle, Olivier Doare, Cristian Pavao Moreira
  • Patent number: 10637414
    Abstract: Described herein is an apparatus and system of a low-impedance reference voltage generator. The apparatus comprises: a voltage-control loop including a first transistor to provide an output voltage; and a current-control loop to sense current through the first transistor, relative to a reference current. The node having the output voltage is a low-impedance node.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: April 28, 2020
    Assignee: Intel Corporation
    Inventor: Richard Y. Tseng
  • Patent number: 10622888
    Abstract: A negative voltage circuit includes a first charge pump circuit and a second charge pump circuit. The first charge pump circuit is configured to operate in a start-up mode and perform a first charge pumping operation based on a first current to generate a negative voltage. The second charge pump circuit is configured to operate in a normal operating mode subsequent to the start-up mode and perform a second charge pumping operation based on a second current to generate a negative voltage, The first current is higher than the second current, and a speed of the first charge pumping operation is higher than a speed of the second charge pumping operation.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: April 14, 2020
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Hyun Paek, Byeong Hak Jo
  • Patent number: 10620075
    Abstract: Certain implementations of the disclosed technology may include systems, methods, and apparatus for assigning a distinct identifier (ID) to a pressure transducer based on resistor values. Embodiments include electrically identifying the distinct ID, and compensating the pressure transducer based on the distinct ID. According to an example implementation, a method is provided that can include coupling a transducer ID measurement assembly with a transducer assembly; measuring, by the transducer ID measurement assembly, a plurality of divided voltages between a plurality of configurable ID switches and a reference resistor; determining, with a processor, a distinct ID associated with the transducer assembly based on the plurality of measured divided voltages; retrieving one or more compensation parameters based on the distinct ID; and compensating, with the one or more compensation parameters, a measurement signal of the transducer assembly.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: April 14, 2020
    Assignee: Kulite Semiconductor Products, Inc.
    Inventor: Wolf Landmann
  • Patent number: 10613570
    Abstract: A bandgap circuit generates a process and temperature independent voltage. The bandgap circuit includes a bandgap core that generates a temperature independent voltage. The bandgap circuit also includes a resistor ladder that is coupled in parallel to the bandgap core and scales the temperature independent voltage into voltage levels proportional to the temperature independent voltage. An output switch of the bandgap circuit connects the output of the bandgap circuit to one of the voltage level that is substantially equal to a desired voltage level. The bandgap circuit may also include a current mirror that outputs a proportional to absolute temperature current.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: April 7, 2020
    Assignee: INPHI CORPORATION
    Inventors: Nicola Codega, Fabio Giunco, Giovanni Cesura
  • Patent number: 10585447
    Abstract: A voltage generator and a method for generating an output voltage is presented. The generator has a current mirror circuit with a first transistor having a gate and a first terminal, and a second transistor having a gate coupled to the gate of the first transistor, and with a first terminal coupled to a feedback node. A third transistor has a gate, a first terminal and a second terminal. The first terminal is coupled to the feedback node and the second terminal is coupled to an output node. A fourth transistor has a gate coupled to the third transistor. There is a current source coupled to the output node, and a feedback circuit to detect a terminal voltage at the feedback node and to control the terminal voltage by adjusting a gate voltage at the gate of the second transistor.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: March 10, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Susumu Tanimoto
  • Patent number: 10551863
    Abstract: A voltage regulation circuit (2) comprises first (4) and second (6) voltage regulators each arranged to receive an input voltage (Vin) and a respective reference voltage; and first (18) and second (30) reference voltage sources arranged to provide the first and second reference voltages respectively. In a first mode of operation, the first regulator varies the regulated output voltage in response to a difference between the regulated output voltage (Vout) and the first reference voltage. In a second mode of operation, the second regulator varies the regulated output voltage in response to a difference between the regulated output voltage and the second reference voltage. The second voltage regulator is arranged to provide a greater maximum output current than the first voltage regulator. The circuit further comprises a switch portion (8) arranged to provide a third mode of operation in which the first regulator provides the regulated output voltage and the second regulator provides additional output current.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: February 4, 2020
    Assignee: Nordic Semiconductor ASA
    Inventor: Samuli Hallikainen
  • Patent number: 10553916
    Abstract: An ambient heat engine that is thermally coupled to its environment is provided. The ambient heat engine includes two complementary electrochemical cells. One cell has a positive voltage temperature coefficient and the other cell has a negative voltage temperature coefficient. The ambient heat engine further includes a controller and an electrical energy storage device. When the ambient temperature increases or decreases, the temperature variation creates a voltage differential between the two cells, and the controller discharges the higher voltage cell and uses a portion of the discharged energy to charge the lower voltage cell. The difference in energy is extracted by the controller and supplied to the electrical energy storage device. The controller includes circuitry for coupling energy from the energy storage device to the cells in order to compensate for self-discharge of the cells which may occur due to electronic leakage and diffusion phenomenon over extended periods of time.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: February 4, 2020
    Assignee: Johnson IP Holding, LLC
    Inventor: Lonnie G. Johnson
  • Patent number: 10553381
    Abstract: The present disclosure discloses an electrical switchgear configured to control an electro-magnet by using the electro-magnet, a critical temperature device, and an electro-magnet control unit without using a bimetal and a mechanical contact. The electro-magnet switches power applied through a power line in response to a flow of control current to a power device connected to a load side. In a critical temperature device, an output current value varies when a temperature of a heating wire, which is connected to the power line, exceeds a critical temperature by supply current flowing to the power device. An electro-magnet control unit, which is realizable with an SCR, allows a flow of control current of the electro-magnet to be generated or cut off in response to the output current value of the critical temperature device.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: February 4, 2020
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hyun-Tak Kim, Sungwoo Jo, Sun-Kyu Jung, Jin-cheol Cho
  • Patent number: 10551864
    Abstract: A bandgap voltage reference circuit configured to generate a bandgap reference voltage is provided. The bandgap voltage reference circuit includes a bandgap current generating circuit, a differential pair circuit and a flipped voltage follower. The bandgap current generating circuit converts the bandgap reference voltage into a bandgap current and generates a first voltage and a second voltage according to the bandgap current. The differential pair circuit is coupled to the bandgap current generating circuit to receive the first voltage and the second voltage and configured to reduce a voltage difference between the first voltage and the second voltage and generate a third voltage. The flipped voltage follower is coupled to the differential pair circuit to receive the third voltage and generates the bandgap reference voltage accordingly.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: February 4, 2020
    Assignee: RichWave Technology Corp.
    Inventors: Che-Sheng Chen, Shun-Nan Tai
  • Patent number: 10546619
    Abstract: An ESD circuit is connected with a pad. The ESD circuit includes a voltage divider, a RC circuit and a path control circuit. The voltage divider is connected between the pad and a first node and provides plural divided voltages. The RC circuit is connected between the pad and the first node. The RC circuit receives the plural divided voltages and provides a control circuit. The path control circuit is connected with the pad and the first node. The path control circuit receives the plural divided voltages and the control voltage. When the pad receives a first ESD zap, the RC circuit controls the path control circuit to turn on a first ESD current path. Consequently, an ESD current flows from the pad to the first node through the first ESD current path.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: January 28, 2020
    Assignee: EMEMORY TECHNOLOGY INC.
    Inventors: Chih-Wei Lai, Yun-Jen Ting, Hsin-Kun Hsu
  • Patent number: 10545527
    Abstract: A reference voltage circuit 2 comprises: a bandgap circuit portion comprising first and second reference transistors (Q1, Q2) and a current source arranged to drive the first and second reference transistor at different current densities, wherein the first and second reference transistors are connected to first and second nodes (N1, N2) respectively; an operational transconductance amplifier (M4, M5, M10, M11, M12) arranged to produce an output current that is proportional to a difference between a voltage at the first node and a voltage at the second node; an output current mirror circuit portion (M3) arranged to generate a mirror current that is a scaled version of the output current and drive said mirror current through a load (R3) so as to produce a reference voltage (Vref); and a reference monitoring circuit portion (6) arranged to monitor the operational transconductance amplifier and generate a flag (Vready) if a current flowing through the operational transconductance amplifier exceeds a threshold.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: January 28, 2020
    Assignee: Nordic Semiconductor ASA
    Inventor: Samuli Hallikainen
  • Patent number: 10536135
    Abstract: A pseudo resistor with tunable resistance including a first transistor and a second transistor is provided. The first transistor has a first terminal, a second terminal and a control terminal. The first terminal of the first transistor serves as a first terminal of the pseudo resistor. The control terminal of the first transistor receives a control voltage. The first transistor is controlled by the control voltage, such that the first transistor operates in a weak inversion region. The second transistor has a first terminal, a second terminal and a control terminal. The first terminal of the second transistor is coupled to the second terminal of the first transistor. The second terminal of the second transistor and the control terminal of the second transistor are coupled to each other to serve as a second terminal of the pseudo resistor with tunable resistance. The second transistor operates in the weak inversion region.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: January 14, 2020
    Assignee: Winbond Electronics Corp.
    Inventors: Chung-Chih Hung, Jia-Heng Chang
  • Patent number: 10528070
    Abstract: A low-noise, low-power reference voltage circuit can include an operational transconductance amplifier (OTA) with inputs coupled to a temperature-compensated voltage, such as can be provided by source-coupled first and second field-effect transistors (FETs) having different threshold voltages. A capacitive voltage divider can feed back a portion of a reference voltage output by the OTA to the inputs of the OTA to help establish or maintain the temperature-compensated voltage across the inputs of the OTA. A switching network can be used, such as initialize the capacitive voltage divider or other capacitive feedback circuit, such as during power-down cycles, or when resuming powered-on cycles. A switch can interrupt current to the OTA during the power-down cycles to save power. The cycled voltage reference circuit can provide a reference voltage to an ADC reservoir capacitor. Powering down can occur during analog input signal sampling, during successive approximation routine (SAR) conversion, or both.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: January 7, 2020
    Assignee: Analog Devices Global Unlimited Company
    Inventors: Michael C. W. Coln, Michael Mueck, Quan Wan, Sandeep Monangi
  • Patent number: 10520960
    Abstract: A circuit includes a regulation control circuit. The regulation control circuit includes an error amplifier to generate a control output signal based on an error signal input and a reference input. The regulation control circuit includes a level shifter to receive a negative voltage supplied to a load and to provide a positive error signal to the error signal input of the error amplifier. A driver circuit receives the control output signal from the error amplifier and generates a drive output signal in response to the control output signal. A regulation output circuit regulates the negative voltage supplied to the load in response to the drive output signal from the driver circuit.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: December 31, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Michael John Shay
  • Patent number: 10520972
    Abstract: A bandgap reference (BGR) circuit is provided. The BGR circuit includes a first node, a second node, and a third node. A first resistive element is connected between the second node and the third node. The BGR circuit is operative to provide a reference voltage as an output. The BGR circuit further includes a current shunt path connected between the first node and the third node, the current shunt path being operable to regulate a voltage drop across the first resistive element.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: December 31, 2019
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Jaw-Juinn Horng, Chin-Ho Chang, Yi-Wen Chen
  • Patent number: 10520963
    Abstract: Regulating voltages at inputs of an electronic device by performing at least the following: receiving, at a voltage monitoring circuit, a monitoring voltage corresponding to a power system, determining, at the voltage monitoring circuit, whether the monitoring voltage is equal to or exceeds a monitoring threshold voltage, receiving, at the voltage monitoring circuit, an output indicating whether an inputted reference voltage and an inputted feedback voltage at a comparator circuit differs, regulating, at the voltage monitoring circuit, a feedback voltage to match the inputted reference voltage based on the output and a determination that the monitoring voltage is equal to or exceeds the monitoring threshold voltage, and providing, from the voltage monitoring circuit, the feedback voltage as an updated inputted feedback voltage for the comparator circuit.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: December 31, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Zhenghao Cui, Yadan Shen
  • Patent number: 10509430
    Abstract: The embodiments of the present disclosure disclose a reference circuit, comprising a current control sub-circuit, a voltage control sub-circuit and a voltage adjustment sub-circuit, wherein the current control sub-circuit outputs current to a first terminal and a second terminal of the voltage control sub-circuit and a first terminal of the voltage adjustment sub-circuit at a ratio of 1:1:n respectively, and the first terminal and the second terminal of the voltage control sub-circuit may cause a voltage at a second terminal of the voltage adjustment sub-circuit to be equal to a voltage at a third terminal of the voltage adjustment sub-circuit upon receiving equal current output by the current control sub-circuit, and the voltage adjustment sub-circuit may adjust a voltage output at an output terminal of the reference circuit to be independent of a temperature when the voltage at the second terminal is equal to the voltage at the third terminal.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: December 17, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Tangxiang Wang
  • Patent number: 10503197
    Abstract: A current generation circuit includes: a current source circuit including a first transistor and a first resistor, and configured to output a first current based on a source voltage or a drain voltage of the first transistor and a resistance of the first resistor; a current control circuit including a voltage input terminal, a second transistor and a third transistor, and configured to output a second current based on a source voltage of the second transistor and a resistance of the third transistor; and an impedance circuit including a second resistor formed of a same resistive body as the first resistor and a fourth transistor diode-connected to the second resistor, and configured to generate a control voltage at the voltage input terminal by the first current and the second current, wherein the current generation circuit is configured to output a current based on the second current.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: December 10, 2019
    Assignee: ABLIC INC.
    Inventors: Masakazu Sugiura, Atsushi Igarashi, Nao Otsuka
  • Patent number: 10496121
    Abstract: A current mirror circuit includes: a first transistor and a second transistor connected in series, a third transistor and a fourth transistor connected in series; and further includes: a reference voltage source, a fifth transistor, and a control module connected between the reference voltage source and the fifth transistor. A current mirror is formed by the third transistor and the fourth transistor together with the first transistor and the second transistor, to produce a mirror current at a drain of the third transistor according to a current source coupled to a drain of the first transistor; the control module is configured to control the fifth transistor to operate in the linear region.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: December 3, 2019
    Assignee: BOE Technology Group Co., Ltd.
    Inventor: Tangxiang Wang
  • Patent number: 10496122
    Abstract: An integrated circuit includes an output driver circuit configured to provide a first voltage at an output terminal. The output driver circuit includes a transistor having a first current electrode coupled at a voltage supply terminal and a second current electrode coupled at the output terminal, and a resistor having a first terminal coupled at the output terminal and a second terminal coupled at a first node. An amplifier circuit is coupled to the output driver circuit and is configured to generate a proportional to absolute temperature (PTAT) current in a first circuit branch of the output driver circuit coupled at the first node. A complementary to absolute temperature (CTAT) circuit is configured to generate a CTAT current in a second circuit branch coupled at the first node.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: December 3, 2019
    Assignee: NXP USA, INC.
    Inventors: Anil Kumar Gottapu, Sanjay Kumar Wadhwa, Ravi Dixit
  • Patent number: 10481624
    Abstract: A bandgap reference circuit including a clamp circuit is provided. The bandgap reference circuit performs the calibration only for one time in a normal mode to store a control code of a reference generator of the clamp circuit. In a suspend mode, the control code is used for controlling the reference generator to cause the clamp circuit to provide a desired source voltage, and a bandgap reference voltage source is shut down to reduce the power consumption.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: November 19, 2019
    Assignee: PIXART IMAGING INC.
    Inventor: Kok-Siang Tan
  • Patent number: 10469071
    Abstract: A method of controlling a power field-effect transistor includes controlling a plurality of different phases of a gate-to-source voltage of the power field-effect transistor. Without comparing the gate-to-source voltage of the power field effect transistor to a plurality of reference voltages, the method includes discriminating between the different phases of the gate-to-source voltage based on the plurality of reference voltages. At least one of the plurality of reference voltages is based on a threshold voltage of at least one field-effect transistor.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: November 5, 2019
    Assignee: STMicroelectronics S.r.l.
    Inventor: Aldo Davide Gariboldi
  • Patent number: 10459465
    Abstract: Active post-power loss discharging of capacitors is provided. In an integrated circuit having a startup behavior depending on a capacitor voltage, a discharge transistor is provided to discharge the capacitor. A power-down discharger actively drives the discharge transistor after a power supply voltage drops below a threshold. The power-down discharger may include, or be coupled to, an internal capacitance that is charged when the power supply voltage is above the threshold, thereby storing sufficient energy for later driving of the discharge transistor. A diode is employed to ensure that the loss of power does not drain away the needed energy until after the discharge has been completed. One illustrative discharging method includes: sensing a condition indicative of power supply voltage loss for an integrated circuit; and actively driving the discharge transistor into a conducting state. The sensing may include driving the discharge transistor inversely to a signal from a pin.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: October 29, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Jan Jezik, Pierre Andre Genest
  • Patent number: 10444777
    Abstract: A reverse-current-prevention circuit includes a reverse-current-prevention transistor of a P-channel MOS transistor inserted between an input terminal supplied with a power supply voltage and an output stage transistor of a P-channel MOS transistor providing an output voltage from an output terminal, and a reverse-current-prevention controller configured to turn the reverse-current-prevention transistor from on to off according to exceedance of the output voltage to the power supply voltage. The reverse-current-prevention controller includes a first transistor of a depletion type P-channel MOS transistor having a source and gate respectively connected to the output terminal and the input terminal, and a second transistor of a depletion type P-channel MOS transistor having a source and gate respectively connected to a drain of the first transistor and a gate of the reverse-current-prevention transistor, and a drain grounded.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: October 15, 2019
    Assignee: Ablic Inc.
    Inventor: Tsutomu Tomioka
  • Patent number: 10446116
    Abstract: An apparatus is disclosed. In some examples, the apparatus comprises a display panel comprising a plurality of display pixels. In some examples, the apparatus comprises a plurality of temperature sensors disposed at different portions the display panel, wherein the plurality of temperature sensors comprise ratioed pairs of thin film transistors and the ratioed pairs of thin film transistors are formed on the display panel. In some examples, the apparatus comprises control circuitry for changing illumination properties of the plurality of display pixels based on changes is temperature detected by a proximate temperature sensor of the plurality of temperature sensors. In some examples, the ratioed pairs of thin film transistors are operated in a sub-threshold mode.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: October 15, 2019
    Assignee: Apple Inc.
    Inventors: Sheng Zhang, Chaohao Wang, Cheuk Chi Lo, Chun-Yao Huang, Howard Tang, Paolo Sacchetto
  • Patent number: 10437274
    Abstract: A reference voltage generator includes a voltage generation circuit, an amplifier, a diode unit and a transistor. The voltage generation circuit includes an output terminal for outputting a reference voltage, a first terminal having an operational voltage, and a second terminal. The amplifier includes an input terminal coupled to the first terminal of the voltage generation circuit, an output terminal, a first terminal coupled to a first voltage terminal, and a second terminal. The diode unit includes a first terminal coupled to the second terminal of the amplifier, and a second terminal coupled to the second terminal of the voltage generation circuit and a second voltage terminal. The transistor includes a first terminal coupled to the first terminal of the amplifier, a second terminal coupled to the output terminal of the voltage generation circuit, and a control terminal coupled to the output terminal of the amplifier.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: October 8, 2019
    Assignee: RichWave Technology Corp.
    Inventor: Hwey-Ching Chien
  • Patent number: 10429879
    Abstract: An embodiment for bandgap reference voltage circuitry includes: a bandgap reference voltage generator including: a first bipolar junction transistor (BJT); a first amplifier having a non-inverting input coupled to a collector of the first BJT and a first output node configured to provide a bandgap reference voltage; a first resistor coupled between a base of the first BJT and the first output node; a second BJT; a second amplifier having a non-inverting input coupled to a collector of the second BJT and a second output node coupled to a junction node; a second resistor coupled between a base of the second BJT and the junction node; and a third resistor coupled between the base of the first BJT and the junction node.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: October 1, 2019
    Assignee: NXP USA, Inc.
    Inventor: Ricardo Pureza Coimbra
  • Patent number: 10423188
    Abstract: In a voltage generating circuit, a bandgap voltage generator has a first operational amplifier to receive a first voltage and a second voltage, and generate a bias voltage by comparing the first voltage and the second voltage, wherein the bandgap voltage generator generates a bandgap current according to the bias voltage and generates an output voltage according to the bandgap current. In a start-up circuit, a comparison circuit compares the first voltage or the second voltage with a reference voltage to generate a first comparison result, and generates a first current according to the first comparison result. A voltage regulator generates a second current according to the first current, and compares the second current with a reference current to generate a second comparison result, and adjusts a voltage value of the bias voltage according to the second comparison result.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: September 24, 2019
    Assignee: Faraday Technology Corp.
    Inventor: Jin-Sheng Chen
  • Patent number: 10411597
    Abstract: A family of bandgap embodiments are disclosed herein, capable of operating with very low currents and low power supply voltages, using neither any custom devices nor any special manufacturing technology, and fabricated on mainstream standard digital CMOS processes. As such, manufacturing cost can be kept low, manufacturing yields of digital CMOS system-on-a-chip (SOC) that require a reference can be kept optimal, and manufacturing risk can be minimized due to its flexibility with respect to fabrication process node-portability. Although the embodiments disclosed herein use novel techniques to achieve accurate operations with low power and low voltage, this family of bandgaps also uses parasitic bipolar junction transistors (BJT) available in low cost digital CMOS process to generate proportional and complementary to absolute temperature (PTAT and CTAT) voltages via the base-emitter voltage (VEB) of BJTs and scaling VEB differential pairs to generate the BJTs thermal voltage (VT).
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: September 10, 2019
    Inventor: Ali Tasdighi Far
  • Patent number: 10379567
    Abstract: Bandgap reference circuitry comprises a first current mirror connected to a power supply line and configured to supply a first current to a first node and a second current to a second node virtually-shorted to the first node, a first pn junction element between the first node and a ground line; a first variable resistor element between the second node and the ground line, and a second pn junction element connected in series to the first variable resistor element. The first variable resistor element has a resistance dependent on a power supply voltage supplied to the power supply line.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: August 13, 2019
    Assignee: SYNAPTICS INCORPORATED
    Inventor: Yasuhiko Sone
  • Patent number: 10359793
    Abstract: An oscillator control circuit includes a zero-temperature coefficient (ZTC) estimator estimating a ZTC voltage based on a supply voltage supplied to the oscillator and a frequency of an oscillation signal output by the oscillator. The ZTC voltage is the magnitude of the supply voltage VDD which corresponds to the ZTC condition for the oscillator. The ZTC estimator generates a bias control signal such that the magnitude of the supply voltage becomes the ZTC voltage.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: July 23, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-Seok Kim, Tae-Ik Kim, Ji-Hyun Kim
  • Patent number: 10355649
    Abstract: A voltage or current generator has a configurable temperature coefficient and includes a first voltage generator that generates a first voltage having a first negative temperature coefficient. A second voltage generator generates a second voltage having a second negative temperature coefficient different to the first negative temperature coefficient. A circuit generates an output level based on the difference between the first voltage scaled by a first scale factor and the second voltage scaled by a second scale factor.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: July 16, 2019
    Assignee: STMicroelectronics SA
    Inventors: Jean-Pierre Blanc, Severin Trochut
  • Patent number: 10355579
    Abstract: A voltage regulator that includes an input voltage; a first JFET transistor, the input voltage being applied to a drain of the first JFET transistor; a second JFET transistor, the input voltage being applied to a drain of the second JFET transistor; and a resistor string, the resistor string including a first resistor, a second resistor and a third resistor, the resistor string and the second JFET transistor forming a voltage reference circuit having a reference voltage.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: July 16, 2019
    Inventor: Steven E. Summer
  • Patent number: 10355648
    Abstract: A regulator amplifier circuit of an embodiment includes a differential amplifier circuit, an nMOS transistor, and a pMOS transistor. The differential amplifier circuit includes a differential circuit and a transistor. The differential circuit includes a differential MOS transistor circuit, and the transistor includes a gate voltage controlled by the differential circuit. The nMOS transistor includes a drain connected to a drain on minus side of the differential MOS transistor, and a gate connected to a source of the transistor. The nMOS transistor operates in a weak inversion region. The pMOS transistor includes a source connected to a source of the nMOS transistor, and a drain connected to a voltage lower than a source voltage of the nMOS transistor. The pMOS transistor operates in the weak inversion region.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: July 16, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Norihiro Ueda
  • Patent number: 10348275
    Abstract: There is disclosed configurable frequency-divider circuitry for generating a target signal of a frequency Fr/Di based on a reference signal of a frequency Fr, where Di is an integer divider ratio, the frequency-divider circuitry comprising: N divider stages organised into a ring, each stage configured to receive an input signal and generate an output signal, with the output signal of each successive stage in the ring being the input signal of the next stage in the ring, wherein: the ring of stages is controlled by the reference signal so that the output signals are governed by the reference signal; the target signal is one of the output signals or a signal derived therefrom; and at least one of the stages is a configurable stage, whose mode of operation is configurable based on a configuration signal to configure the value of Di.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: July 9, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: Dario San Martin Molina, Gordon James Bates
  • Patent number: 10338621
    Abstract: An integrated circuit (IC) comprises an output and a voltage regulator. The voltage regulator comprises an amplifier having a first input coupled to a reference voltage source and a second input coupled to the output, a first resistor coupled to the output and coupled to a ground terminal, a metal oxide semiconductor field effect transistor (MOSFET) having a gate coupled to an output of the amplifier and a drain coupled to the output, and a second resistor coupled to a source of the MOSFET and coupled to the ground terminal.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: July 2, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Nghia Trong Tang, Byungchul Brandon Jang, Timothy Bryan Merkin
  • Patent number: 10310539
    Abstract: The present disclosure relates to a PTAT voltage reference circuit and a temperature independent voltage reference circuit in which the effect of transistor base currents on the circuit output is compensated for. This is achieved by a pair of compensation resistors. The base current from one of the pair of transistors is used to increase the voltage drop across one of the compensation resistors. The base current from the other of the pair of transistors is used to decrease the voltage drop across another of the compensation resistors, by an equal amount. The compensation resistors are connected in series with the resistor which reflects the difference in base-emitter voltage (?VBE). The circuit output is measured across the series connected resistors. As such, the base currents are compensated for at the output.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: June 4, 2019
    Assignee: ANALOG DEVICES GLOBAL
    Inventor: Stefan Marinca
  • Patent number: 10303197
    Abstract: A reference voltage circuit is provided. The reference voltage circuit includes a first current bias circuit including a first node; a second current bias circuit including a plurality of NMOS transistors and a second node, and an amplifier configured to output a reference voltage having same value as the second voltage. The plurality of NMOS transistors include a first NMOS transistor and a second NMOS transistor, the first NMOS transistor is connected to the first node, and the plurality of NMOS transistors are connected to the second node and configured to perform a sub-threshold operation based on a first voltage of the first node so that a second voltage is generated at the second node.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: May 28, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seung-hyun Oh, Woo-jin Jang, Jong-woo Lee
  • Patent number: 10298121
    Abstract: Provided are a switching regulator and a voltage-current conversion circuit configured to shorten a start-up period. The voltage-current conversion circuit includes: a first MOS transistor of a first conductivity type including a gate and a drain connected in common, and a source connected to a first power supply terminal; a first resistor connected between the drain of the first MOS transistor and a second power supply terminal; and a correction current generation unit including a second resistor, and configured to generate, as a correction current, through use of the second resistor, a current corresponding to a current generated when a voltage corresponding to an absolute value of a gate-source voltage of the first MOS transistor is applied to the first resistor. The voltage-current conversion circuit is configured to add the correction current to a current flowing through the first resistor, to thereby generate the conversion current.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: May 21, 2019
    Assignee: ABLIC INC.
    Inventors: Kosuke Takada, Akihiro Kawano
  • Patent number: 10296027
    Abstract: A bandgap reference circuit including a clamp circuit is provided. The bandgap reference circuit performs the calibration only for one time in a normal mode to store a control code of a reference generator of the clamp circuit. In a suspend mode, the control code is used for controlling the reference generator to cause the clamp circuit to provide a desired source voltage, and a bandgap reference voltage source is shut down to reduce the power consumption.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: May 21, 2019
    Assignee: PIXART IMAGING INC.
    Inventor: Kok-Siang Tan