Linearly Acting Patents (Class 323/273)
  • Patent number: 11338747
    Abstract: A linear power supply circuit is provided with: an output transistor; and a driver for driving the output transistor on the basis of the difference between a voltage based on an output voltage and a reference voltage. The driver is provided with: a differential amplifier for outputting a voltage according to the difference between the voltage based on the output voltage and the reference voltage; a capacitor one end of which has an output of the differential amplifier applied thereto and the other end of which has the voltage based on the output voltage applied thereto; a converter for converting a voltage based on the output of the differential amplifier into an electrical current and outputting the electrical current; and a current amplifier for amplifying the electrical current of the output of the converter. The supply voltage of the differential amplifier is a first constant voltage or the input voltage.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: May 24, 2022
    Assignee: Rohm Co., Ltd.
    Inventors: Isao Takobe, Yuhei Yamaguchi, Tetsuo Tateishi, Takeshi Nagata
  • Patent number: 11340643
    Abstract: A linear regulator circuit having fast transient response includes an error amplifier (EA) circuit and an output stage circuit. The EA circuit amplifies a difference between a feedback signal and a reference signal to generate an error amplified signal. The output stage circuit includes at least one output power switch which is controlled by the error amplified signal to generate an output signal at an output node. The EA circuit includes at least one pre-stage amplifier circuit which includes a current source circuit, a differential input circuit, a first, a second and a third current mirror circuits and at least one feedback capacitor. One differential transistor of the differential input circuit, the first and the second current mirror circuit form a positive potential feedback (PPFB) loop. The feedback capacitor is coupled between the output node and at least one inverting node at the PPFB loop.
    Type: Grant
    Filed: September 27, 2020
    Date of Patent: May 24, 2022
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Min-Hung Hu
  • Patent number: 11327516
    Abstract: A power supply control apparatus includes a voltage control transistor connected between a DC voltage input terminal and an output terminal; a control circuit controlling the voltage control transistor according to an output feedback voltage; and a first external terminal receiving an output control signal to control an output voltage. The control circuit includes a first error amplifier outputting a voltage according to an electric potential difference between a voltage divided by a first voltage dividing circuit which divides the output voltage of the output terminal and a predetermined reference voltage; and an output changing circuit including a second error amplifier receiving a voltage input in the first external terminal, a transistor having a control terminal receiving the output of the second error amplifier, and a current mirror circuit connected to the voltage input terminal which transfers an electric current flowing in the transistor.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: May 10, 2022
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Shinichiro Maki, Yoichi Takano, Katsuhiro Yokoyama
  • Patent number: 11294412
    Abstract: An example apparatus includes power amplification circuitry and current-level switch circuitry. The power amplification circuitry has a first input port, a second input port, and field-effect transistor (FET) circuitry, the FET circuitry to operate in a saturation mode while drawing power provided at the first input port from a first power source. The current-level switch circuitry is to sense a change in a current-level used to maintain the FET circuitry in the saturation mode and, in response to the sensed change in the current-level, to cause the power amplification circuitry to draw power provided at the second input port from a second power source while maintaining the saturation mode of the FET circuitry.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: April 5, 2022
    Assignee: NXP B.V.
    Inventors: Christian Vincent Sorace, Ludovic Oddoart, Fabien Boitard
  • Patent number: 11277896
    Abstract: An active gain control circuit includes a voltage divider having a variable resistance configured to attenuate a rectified input line voltage to produce a reference signal, a filter circuit configured to extract a DC-level reference voltage from the reference signal, and an operational amplifier configured to receive the DC-level reference voltage and a comparison voltage, and to generate a gate control signal based on a difference between the comparison voltage and the DC-level reference voltage, wherein a resistance of the voltage divider is controlled by the gate control signal.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: March 15, 2022
    Assignee: ERP POWER, LLC
    Inventor: James H. Mohan
  • Patent number: 11237581
    Abstract: A low-dropout voltage system comprising a current supply with a transistor circuitry, a mode switch capacitor, and a decoupling capacitor, wherein the mode switch capacitor facilitates the low-drop voltage system to swiftly transition from a low mode with a minimal to no transient current output to a high mode with a transient current of about 6 mA by dynamically biasing the transistor circuitry while limiting a voltage or current draw from an external power source.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: February 1, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Niranjan Shankar, Sreeram Subramanyam Nasum
  • Patent number: 11209850
    Abstract: A termination voltage regulation apparatus with transient response enhancement includes a termination voltage regulator and a transient response enhancer. The termination voltage regulator provides a termination voltage at a termination voltage terminal, including first and second switching units. The transient response enhancer, coupled to the termination voltage regulator, is utilized for enhancing transient response of the termination voltage regulator, including a first enhancement circuit for sensing a first signal associated with the first switching unit and enabling a first control terminal of the first switching unit to be at a first voltage in response to the first signal in a sinking mode; and a second enhancement circuit for sensing a second signal associated with the second switching unit and enabling a second control terminal of the second switching unit to be at a second voltage in response to the second signal in a sourcing mode.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: December 28, 2021
    Assignee: ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC.
    Inventor: Yao-Wei Yang
  • Patent number: 11201543
    Abstract: A system includes a current mirror coupled to a first transistor, the first transistor includes a first gate, a first current terminal, and a second current terminal, a controller coupled to the current mirror and a converter, the controller is to output a delayed signal for a second transistor, the second transistor being a part of the converter, and a source voltage coupled to the current mirror.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: December 14, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Tawen Mei
  • Patent number: 11163327
    Abstract: Aspects of the invention include a circuit having a two-stage amplifier coupled to a transistor array and to a comparator, the transistor array being configured to provide an output to a load, the transistor array including transistors. The circuit includes a controller coupled to the comparator and to the transistor array, the two-stage amplifier being configured to modulate a current density in the transistor array via gate terminals of the transistors, wherein, by using the comparator and the controller, the two-stage amplifier is configured to modulate a number of the transistors that are to couple to the load.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: November 2, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Miguel E. Perez, Michael Sperling
  • Patent number: 11150677
    Abstract: Disclosed are a series regulator and electronic equipment. The series regulator includes a first amplifier that drives a first transistor connected between a power supply and a load, a second amplifier that drives a second transistor connected in parallel to the first transistor, an amplifier control circuit that controls whether or not operation of the first amplifier is possible according to the load, and a first overcurrent protection circuit that limits a first output current flowing in the first transistor to a first overcurrent set value or smaller. The first overcurrent protection circuit carries out variable control of the first overcurrent set value according to a second output current flowing in the second transistor. The electronic equipment includes the series regulator and a load that receives power supply from the series regulator and operates.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: October 19, 2021
    Assignee: ROHM CO., LTD.
    Inventor: Makoto Yasusaka
  • Patent number: 11144080
    Abstract: High-resolution switched digital regulators are disclosed having fast cross corner and variable temperature response, with constrained ripple. The strength of the power transistors utilized by the regulator are adjusted to control the current delivered to the load. The regulators utilize a slow control loop in parallel with a primary fast switching loop. The slow loop uses the switching signal of the primary loop to estimate the load current and set the power transistor size accordingly.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: October 12, 2021
    Assignee: NVIDIA Corp.
    Inventors: Sudhir Kudva, John Wilson
  • Patent number: 11119519
    Abstract: For example, a linear power supply includes an output transistor connected between an input terminal of an input voltage and an output terminal of an output voltage, an internal power supply configured to step down the input voltage to generate a predetermined internal power supply voltage, a reference voltage generator configured to generate a predetermined reference voltage from the internal power supply voltage, an amplifier configured to generate a drive signal for the output transistor such that a feedback voltage in accordance with the output voltage is equal to the reference voltage, a drive current generator configured to generate a drive current for the amplifier, and a drive current controller configured to detect a variation of the internal power supply voltage to variably control the drive current.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: September 14, 2021
    Assignee: Rohm Co., Ltd.
    Inventor: Makoto Yasusaka
  • Patent number: 11121573
    Abstract: A power converter can be implemented as a series of power conversion stages, including a wireless power conversion stage. In typical embodiments, the power converter receives power directly from mains voltage and outputs power to a battery within an electronic device. A transmitter side of the power converter converts alternating current received from a power source (e.g., mains voltage) to an alternating current suitable for applying to a primary coil of the wireless power conversion stage of the power converter.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: September 14, 2021
    Assignee: APPLE INC.
    Inventors: InHwan Oh, Zaki Moussaoui, Rohan Dayal, Bharat K. Patel, Manisha P. Pandya, Weihong Qiu, Malhar V. Bhatt
  • Patent number: 11105830
    Abstract: A voltage detector includes a first voltage detection circuit, a second voltage detection circuit, and a voltage divider circuit having a first node for providing a first divided voltage, and a second node for providing a second divided voltage. The second voltage detection circuit has a comparator circuit including a first input end connected to the first node and a second input end connected to a reference voltage. The first voltage detection circuit has a first NMOS transistor including a gate to which the second divided voltage is applied, and a constant current source with one end connected to the first NMOS transistor. The first NMOS transistor is configured to turn on in response to the second divided voltage being higher than a second threshold voltage and turn off in response to the second divided voltage being lower than the second threshold voltage.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: August 31, 2021
    Assignee: Ablic Inc.
    Inventor: Teruo Suzuki
  • Patent number: 11092989
    Abstract: A regulator configured to provide at an output node a load current at an output voltage is described. The regulator comprises a pass transistor for providing the load current at the output node. Furthermore, the regulator comprises feedback means for deriving a feedback voltage from the output voltage at the output node. In addition, the regulator comprises a differential amplifier configured to control the pass transistor in dependence of the feedback voltage and in dependence of a reference voltage. The regulator further comprises compensation means configured to determine a sensed current which is indicative of the load current at the output node. Furthermore, the compensation means are configured to adjust an operation point of the regulator in dependence of the sensed current and in dependence of a value of a track impedance of a conductive track which links the output node to a load.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: August 17, 2021
    Assignee: Apple Inc.
    Inventors: Hande Kurnaz, Ambreesh Bhattad, Gary Hague, Frank Kronmueller
  • Patent number: 11063582
    Abstract: A current detection circuit includes normally-on-type and a first normally-off-type switching elements with main current paths that are connected in series, and a second normally-off-type switching element that has a source and a gate that are connected to a source and a gate of the first normally-off-type switching element and a drain that is connected to a constant current source, and executes a division process by using drain voltages of the two normally-off-type switching elements.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: July 13, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Hideaki Majima
  • Patent number: 11036248
    Abstract: A voltage regulator circuit may include a first loop that forms a reference signal that substantially does not vary in response to the output voltage, the reference circuit may also be configured to form a control signal that is representative of changes in the reference signal. The voltage regulator circuit may also include a second loop configured to form a value of a control electrode of an output transistor according to the control signal and wherein the output circuit is configured to change a value of the control electrode according to a difference between the output voltage and the reference signal.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: June 15, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Martin Podzemny
  • Patent number: 11036247
    Abstract: A voltage regulator circuit includes a power supply terminal and a ground terminal, and a differential amplifier coupled between the power supply terminal and the ground terminal. The voltage regulator circuit also includes an output transistor, which includes a gate node coupled to an output node of the differential amplifier to receive a gate voltage and to provide a regulated output voltage at an output node of the output transistor. The differential amplifier is configured to provide the gate voltage based on a differential between a reference voltage and the regulated output voltage. The voltage regulator also includes a compensation capacitance coupled between a virtual ground node in the differential amplifier and either the power supply terminal or the ground terminal and a virtual ground node in the differential amplifier.
    Type: Grant
    Filed: November 28, 2019
    Date of Patent: June 15, 2021
    Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
    Inventor: Dazhi Wei
  • Patent number: 11036246
    Abstract: An electronic circuit includes a differential amplifier, an output stage and a control circuit. The differential produces a signal proportional to a difference between a reference voltage and a voltage that is proportional to the output signal. The output stage includes multiple switchable circuits coupled between a voltage source and the output terminal such that the switching of the circuits changes impedance between the voltage source and the output terminal. The control circuit receives a feedback indicative of the voltage of the output signal and controls the impedance of the multiple switchable circuits such that current flowing out of the voltage source rises piecewise smoothly from power-on to steady state operation of the electronic circuit.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: June 15, 2021
    Assignee: Verily Life Sciences LLC
    Inventor: Amirpouya Kavousian
  • Patent number: 11003201
    Abstract: A low-dropout (LDO) regulator and an associated method and apparatus are described. The LDO regulator generally includes a first transistor coupled between an input voltage node and an output voltage node of the LDO regulator. The LDO regulator further includes a first amplifier having an output coupled to a gate of the first transistor, wherein a feedback path couples the output voltage node to an input of the first amplifier. The LDO regulator further includes a second amplifier having an output coupled to an enable input of the first amplifier, wherein a voltage-sensing path couples the input voltage node to an input of the second amplifier. The LDO regulator further includes and a second transistor coupled between the gate of the first transistor and a reference potential node, the output of the second amplifier being coupled to a gate of the second transistor.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: May 11, 2021
    Assignee: QUALCOMM INCORPORATED
    Inventors: Shamim Ahmed, David Eric Haglan
  • Patent number: 10998012
    Abstract: A semiconductor memory module includes a memory printed circuit board (PCB) that includes first connectors, a second connector, and a third connector configured to be connectable with an external device, memory devices that are mounted on the memory PCB and are connected with the first connectors, and a power management integrated circuit that is mounted on the memory PCB, receives a first voltage through the second connector, generates a second voltage from the first voltage, and supplies the second voltage to the memory devices. The power management integrated circuit adjusts the second voltage depending on a difference between a signal received through the third connector and the second voltage.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: May 4, 2021
    Inventors: Yoo-Jeong Kwon, Jinseong Yun, Kyudong Lee
  • Patent number: 10996283
    Abstract: Described is an apparatus which comprises: a first voltage regulator (VR) having a reference input node; and a first multiplexer to provide a reference voltage to the reference input node and operable to select one of at least two different reference voltages as the reference voltage.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: May 4, 2021
    Assignee: Intel Corporation
    Inventors: Sankaran M. Menon, Vasudev Bibikar, P. Reddy Sahajananda, Sunghyun Koh, Naveendran Balasingam
  • Patent number: 10965255
    Abstract: Various methods and circuital arrangements for protection of a power amplifier from over voltage are presented. According to one aspect, a protection circuit coupled to a varying supply voltage of the power amplifier controls a biasing current to the power amplifier to limit a power dissipation through the power amplifier. An overvoltage protection circuit detects a level of the varying supply voltage and decreases the biasing current as a linear function of an increasing supply voltage once the supply voltage reaches a programmable voltage level. A slope of the linear function can be made programmable. Programmability of the voltage level and the slope can be used to control biasing currents to a plurality of power amplifiers operating at different times and having different requirements in terms of voltage limits and thermal breakdown. According to another aspect a voltage to current converter for use in the overvoltage protection circuit is presented.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: March 30, 2021
    Assignee: PSEMI CORPORATION
    Inventor: Shota Ishihara
  • Patent number: 10948934
    Abstract: Apparatus and associated methods relate to providing a piecewise loadline having a number of segments with different slopes and selecting a segment of the piecewise loadline based on an output current of a power supply. In an illustrative example, the piecewise loadline may include a segment that has a negative slope. When the output current is less than a predetermined threshold, the segment with the negative slope may be selected to improve power efficiency. In some embodiments, the piecewise loadline may have several segments with different positive slopes. Different segments may be selected to make the load work in different modes. For example, by selecting an overcurrent loadline, the load (e.g., a processor) may be informed to throttle back its performance. Having a piecewise loadline may allow independent optimization of the loadline resistances, voltage thresholds, and current limits.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: March 16, 2021
    Assignee: Alpha and Omega Semiconductor (Cayman) Limited
    Inventor: Chris M. Young
  • Patent number: 10942536
    Abstract: An electronic device includes a voltage regulator circuit having a power NFET coupled between an upper supply voltage and a pre-regulator output node and a current source coupled in series with a diode element between the upper supply voltage and a lower supply voltage. A gate of the power NFET is coupled to a first node between the current source and a diode element. A bypass circuit includes a power PFET coupled between the upper supply voltage and the pre-regulator output node. A comparison circuit is coupled to turn the bypass circuit off when the upper supply voltage is greater than a regulation threshold voltage.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: March 9, 2021
    Assignee: Texas Instruments Incorporated
    Inventors: Mehedi Hassan, Grant Evan Falkenburg
  • Patent number: 10935999
    Abstract: A voltage regulator with a load line circuit is disclosed. The load line circuit is configured to receive a sensed voltage corresponding to an output current of the voltage regulator. The load line circuit is further configured to generate a complex (e.g., nonlinear) load line voltage that is combined with the output voltage of the voltage regulator and compared with a set voltage of the voltage regulator to produce an error signal. The error signal is used as feedback for the voltage regulator so that the output voltage of the voltage regulator can droop by a particular amount corresponding to a particular output current of the voltage regulator. The disclosed analog approach requires neither clock signals nor digital circuitry and utilizes a parallel topology that allows the disclosed approach to be fast and energy efficient.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: March 2, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Han Zou
  • Patent number: 10937616
    Abstract: A control device for an electromagnetic drive of a switchgear includes a plurality of power supply units, each of which is configured to provide, in a specified input voltage range in each case, electrical power that is sufficient for operating the electromagnetic drive: The control device is configured to automatically control the use of the power supply units for operating the electromagnetic drive on the basis of an input voltage of the control device.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: March 2, 2021
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Wolfgang Meid, Ingo Schaar
  • Patent number: 10928426
    Abstract: An apparatus and method for detecting transient voltage at an electrical component of a circuit board is provided. The apparatus including a circuit including a comparator and a latch, wherein a first input of the comparator is electrically coupled to the electrical component, and the comparator receives a threshold voltage at a second input, where the comparator outputs either a high signal or a low signal in response to both the first input and the second input, and an output of the comparator is electrically coupled to an input of the latch such that the latch outputs a high signal in response to receiving a high signal from the comparator, and an indicator electrically coupled to an output of the latch, and where the apparatus is mounted non-permanently to the circuit board to provide a non-permanent electrical coupling between the comparator and the electrical component.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: February 23, 2021
    Assignee: International Business Machines Corporation
    Inventors: Matteo Cocchini, Michael A. Cracraft
  • Patent number: 10895884
    Abstract: According to an aspect, a low dropout (LDO) voltage regulator includes a differential amplifier, a pass transistor coupled to an output of the differential amplifier, where the pass transistor is configured to provide an output voltage of the LDO voltage regulator, and a soft-start circuit coupled to the differential amplifier. The soft-start circuit is configured to adjust a soft-start driving signal to control a slope of the output voltage based on the output voltage during a start-up operation of the LDO voltage regulator.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: January 19, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Vaclav Kotrc, Jan Jezik
  • Patent number: 10845834
    Abstract: A linear regulator for applications with low area constraint resulting in limited load decoupling capacitance that introduces a compensating zero in the regulator loop to counteract the loss of phase margin and further introduces a feed-forward noise cancellation path operating over a wide frequency range covering a first package resonance frequency. The feed-forward path has low power consumption and improves the power-supply rejection ratio.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: November 24, 2020
    Assignee: NVIDIA Corp.
    Inventors: Nikola Nedovic, Sanquan Song
  • Patent number: 10788849
    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: May 21, 2019
    Date of Patent: September 29, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Nghia Trong Tang, Byungchul Brandon Jang, Timothy Bryan Merkin
  • Patent number: 10768646
    Abstract: A low dropout (LDO) regulating device includes a regulator and a pre-charger. The regulator is configured to adjust an output voltage provided to an output node in accordance with a voltage difference between a first reference voltage and a feedback voltage on a feedback node, wherein the feedback node is coupled to the output node. The pre-charger is electrically connected to the regulator, and is electrically connected to the feedback node for charge sharing.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: September 8, 2020
    Assignee: MACRONIX INTERNATIONAL CO., LTD.
    Inventor: Yih-Shan Yang
  • Patent number: 10768650
    Abstract: A voltage regulator and a method for regulating an output voltage are presented. The voltage regulator includes a frequency compensation circuit having a first capacitor coupled to a capacitance multiplier. The capacitance multiplier has a second capacitor coupled to a voltage amplifier. The voltage amplifier amplifies a first voltage that is a function of the output voltage. The advantage of this regulator and method is that it allows increasing the total capacitance of the frequency compensation circuit without unduly increasing the size of the regulator. Another advantage is the allowance of changing the amplification factor without affecting the DC gain.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: September 8, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Chi-Chia Huang
  • Patent number: 10742036
    Abstract: A power converter comprises an inductor coil whose first pole is connected to an input terminal of the power converter, a controllable switch between the ground and a second pole of the inductor coil, a first unidirectionally conductive component providing a path for electric current from the inductor coil towards an output terminal of the power converter when the controllable switch is non-conductive, and an over-current protector at the output terminal. The power converter comprises a second unidirectionally conductive component for conducting electric current from the input terminal to the over-current protector in a fault situation where voltage at the output terminal is smaller than voltage at the input terminal. Thus, the second unidirectionally conductive component constitutes a low-inductance bypass route for fault current and enables the over-current protector to react fast to a fault situation.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: August 11, 2020
    Assignee: DANFOSS EDITRON OY
    Inventors: Kimmo Tapio Rauma, Tero Jarvelainen
  • Patent number: 10739802
    Abstract: A low dropout, LDO, voltage regulator comprising: an LDO input configured to receive an input voltage signal; an LDO output configured to output an output voltage signal; an error amplifying circuit, which is configured to receive a reference signal and a feedback signal associated with the output voltage signal, the error amplifying circuit being further configured to output an error signal; an output stage, which is configured to receive the error signal and output a control signal; and an output device, which is connected to the LDO input and configured to provide the output voltage signal and which is controlled by the control signal for regulating the output voltage signal; wherein the output stage is connected to the input voltage for receiving an adaptive bias current.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: August 11, 2020
    Assignee: STICHTING IMEC Nederland
    Inventor: Stefano Stanzione
  • Patent number: 10707683
    Abstract: Generally, this disclosure relates to methods of prioritizing or directing available power to a main device, such as a temperature-stabilized and/or temperature-controlled storage container. In an embodiment, the method may include measuring electrical power available from a solar photovoltaic module array that is electrically coupled to the main device, and modulating the electrical power drawn by the main device based on the available electrical power. Available power unused by the main device may be diverted to one or more secondary devices.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: July 7, 2020
    Assignee: TOKITAE LLC
    Inventors: Brian L. Pal, Roderick T. Hinman, Shieng Liu, Jennifer Ezu Hu, Fridrik Larusson, Fong-Li Chou, Nels R. Peterson, Lowell L. Wood, Jr.
  • Patent number: 10700670
    Abstract: A voltage control circuit includes: a voltage detection circuit configured to detect an input voltage input through an input terminal, and to provide a detection voltage based on the detecting of the input voltage; a comparison circuit configured to compare the detection voltage with a reference voltage, and to provide a comparison result signal based on a result of the comparing of the detection voltage with the reference voltage; a voltage switching circuit connected between the input terminal and an output terminal, and configured to selectively operate in either one of an ON state and an OFF state according to the comparison result signal; and a voltage dropping circuit connected to the voltage switching circuit in parallel, and configured to drop the input voltage to a dropped voltage and output the dropped voltage to the output terminal.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: June 30, 2020
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Nak Jun Jung
  • Patent number: 10691151
    Abstract: A system includes a first transistor having a drain and source connected between a supply voltage and an output of a voltage regulator. A gate of the first transistor receives a first gate voltage. The system includes a second transistor having a drain and source connected between the supply voltage and the drain of the first transistor. The second transistor protects the first transistor from excessive voltage. The system includes a level shifter connected between a gate of the second transistor and a gate of the first transistor. The level shifter produces a level-shifted gate voltage for the second transistor that is based on the first gate voltage and that is proportional to an output load current output at the source of the first transistor.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: June 23, 2020
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Robert A. Greene, Jacob K. Easter
  • Patent number: 10680514
    Abstract: A power supply circuit including an input terminal, an output terminal, a power output circuit, and a mode selection circuit. In the power supply circuit, the mode selection circuit is configured to supply a signal indicating whether the power output circuit is operated as a charge pump-type power output circuit or a series regulator-type power output circuit, and a voltage applied from the input terminal is stepped up or down by the power output circuit and then provided to the output terminal.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: June 9, 2020
    Assignee: ABLIC INC.
    Inventor: Kotaro Watanabe
  • Patent number: 10671105
    Abstract: An apparatus includes an amplifier configured to compare a feedback input, corresponding to a voltage of an output voltage node, with respect to a reference input and to provide a control output to control the output voltage node based on a difference between the feedback input and the reference input. At least two source circuits are coupled with the output voltage node. Each of the source circuits are configured to provide respective voltage sources to supply electrical power to the output voltage node.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: June 2, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Michael James Mills, Anand Kudari, Timothy Bryan Merkin
  • Patent number: 10663993
    Abstract: A voltage regulator includes a band limited reference voltage. The band limited reference voltage is generated from a supply voltage combined with a feedback path to provide a band reject power supply rejection ratio (PSRR). The voltage regulator also includes a feedforward path to extend the band reject PSRR.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: May 26, 2020
    Assignee: QUALCOMM INCORPORATED
    Inventors: Tongyu Song, Jeffrey Mark Hinrichs
  • Patent number: 10642296
    Abstract: Apparatus and methods for programmable low dropout regulators for radio frequency (RF) electronics are provided herein. In certain configurations, a power amplifier system includes a multi-stage power amplifier that amplifies a radio frequency signal and includes a driver stage and an output stage. The power amplifier system further includes an envelope tracker that controls a supply voltage of the output stage in relation to an envelope of the radio frequency signal, and a programmable low dropout regulator that includes an output that provides a programmable supply voltage to the driver stage. The programmable low dropout regulator includes an output capacitor electrically connected to the output, a regulation transistor having a drain electrically connected to the output, and an alternative discharge circuit that discharges the output capacitor in response to programming the programmable supply voltage from a high voltage level to a low voltage level.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: May 5, 2020
    Assignee: Skyworks Solutions, Inc.
    Inventors: Netsanet Gebeyehu, Ying Shi, Jinghang Feng
  • Patent number: 10613565
    Abstract: A regulator configured to provide at an output node a load current at an output voltage is described. The regulator comprises a pass transistor for providing the load current at the output node. Furthermore, the regulator comprises feedback means for deriving a feedback voltage from the output voltage at the output node. In addition, the regulator comprises a differential amplifier configured to control the pass transistor in dependence of the feedback voltage and in dependence of a reference voltage. The regulator further comprises compensation means configured to determine a sensed current which is indicative of the load current at the output node. Furthermore, the compensation means are configured to adjust an operation point of the regulator in dependence of the sensed current and in dependence of a value of a track impedance of a conductive track which links the output node to a load.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: April 7, 2020
    Assignee: Apple Inc.
    Inventors: Hande Kurnaz, Ambreesh Bhattad, Gary Hague, Frank Kronmueller
  • Patent number: 10599171
    Abstract: An electronic circuit includes parallel linear regulator circuits that support a range of different load currents. The electronic circuit includes a first linear regulator circuit coupled to an output node, a second linear regulator circuit coupled in parallel with the first linear regulator circuit and the output node, and a control circuit. The control circuit is configured to monitor the output node and to suppress or inhibit the second linear regulator circuit from supplying the output node when a representation of load power consumption is below a specified threshold. The first linear regulator circuit is configured to continue to supply a portion of the load power when the representation of load power consumption is above the specified threshold, and the control circuit may disable the second linear regulator circuit when the representation of load power consumption is below the specified threshold.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: March 24, 2020
    Assignee: Analog Devices Global Unlimited Company
    Inventors: Langyuan Wang, Danzhu Lu, Xiaohan Gong, Bin Shao
  • Patent number: 10591941
    Abstract: A low dropout regulator with wide input supply voltage includes a controller, an comparing circuit, a feedback circuit, an adjustable source follower, and an adjustable driving circuit. The controller is used for detecting a supply voltage. The feedback circuit, the comparing circuit, the adjustable source follower, and the adjustable driving circuit are used for regulating an output voltage according to a reference voltage. When the adjustable source follower and the adjustable driving circuit operate in the low-voltage mode, the controller further activates a first parallel metal-oxide-semiconductor transistor in the adjustable source follower and a second parallel metal-oxide-semiconductor transistor in the adjustable driving circuit.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: March 17, 2020
    Assignee: Etron Technology, Inc.
    Inventors: Wei-Chuan Cheng, Keng-Yi Wu
  • Patent number: 10571945
    Abstract: Disclosed are low power (e.g., nanowatt) voltage regulator circuits and devices, systems and methods using the same for ultra-low power applications, such as, but not limited to, Internet of things (IoT) applications. The disclosed devices and systems relate to low-dropout (LDO) circuits and methods for constructing and using the same. The disclosed LDOs operate with uniform output frequency characteristics over a wide range of load currents.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: February 25, 2020
    Assignee: Atlazo, Inc.
    Inventor: Bardia Pishdad
  • Patent number: 10571943
    Abstract: A (pre) driver circuit includes first and second output terminals configured to be coupled to a power transistor. A differential stage has non-inverting and inverting inputs for receiving an input voltage. The input voltage is replicated as an output voltage across the first and second output terminals as a drive signal for the power transistor. The differential stage includes a differential transconductance amplifier in a voltage follower arrangement configured to provide continuous regulation of a voltage at the first output terminal with respect to the second output terminal.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: February 25, 2020
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Vanni Poletto, Biagio Provinzano
  • Patent number: 10566890
    Abstract: A complex regulator of a remote-controlled car or remote-controlled boat includes a power input terminal, a power output terminal, a switch regulator, and a linear regulator. The switch regulator and the linear regulator are both connected between the power input terminal and the power output terminal and regulates the input voltage after which the input voltage is conveyed to the power output terminal. The switch regulator and the linear regulator have different operational conditions. When the remote-controlled car or remote-controlled boat is operated under a heavy load condition and the input voltage is consequently reduced to a level lower than the first threshold voltage and higher than the second threshold voltage, the switch regulator stops regulating the input voltage and the linear regulator continues regulating the input voltage to maintain the operation of the controller of the remote controlled car or boat.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: February 18, 2020
    Assignee: Jason Toys & Electronics Co., Ltd.
    Inventor: Shi-Tang Yeh
  • Patent number: 10558230
    Abstract: High-resolution switched digital regulators are disclosed having fast cross corner and variable temperature response, with constrained ripple. The strength of the power transistors utilized by the regulator are adjusted to control the current delivered to the load. The regulators utilize a slow control loop in parallel with a primary fast switching loop. The slow loop uses the switching signal of the primary loop to estimate the load current and set the power transistor size accordingly.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: February 11, 2020
    Assignee: NVIDIA Corp.
    Inventors: Sudhir Kudva, John Wilson
  • Patent number: 10541647
    Abstract: Transconductance (gm)-cell based circuitry is well suited for low power, low voltage complementary metal oxide silicon (CMOS) design in deep sub micro technology. This circuitry includes a gm cell as the basic building block. As such, it is desirable to have the transconductance of the gm cell to be constant against temperature and process corners. The present disclosure describes various gm-cell based circuitry having a controllable transconductance. Preferably, the controllable transconductance can be selectively controlled to be equal to the inverse of the value of an on-chip resistor. For example, the gm-cell based circuitry can sense the transconductance of an internal replica unit and can use negative feedback circuitry to cause this transconductance to be approximately equal a value of an on-chip resistor. However, in some situations, a value of this on-chip resistor is not accurately controlled.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: January 21, 2020
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Howard Chi, Seema B. Anand