Patents Examined by Carlos O Rivera-Perez
  • Patent number: 10802520
    Abstract: A system can include a device under test (DUT) having a DUT voltage, a cable connected to the DUT, the cable having a cable inductance, and a power supply configured as a current source to provide a wide bandwidth voltage source to the DUT, wherein the DUT voltage is independent of the cable inductance.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: October 13, 2020
    Assignee: Keithley Instruments, LLC
    Inventors: Kevin Cawley, Wayne Goeke, Gregory Sobolewski
  • Patent number: 10797600
    Abstract: To provide a power supply apparatus that can boost input voltage from a low-power input source. A power supply apparatus is provided, including: an inductor connected to an input terminal to which input voltage is applied; a first switch connected between a point between the inductor and an output terminal, and a ground terminal; a drive unit operating the first switch using a signal having amplitude corresponding to the input voltage; and a control unit controlling operation of the first switch and/or outputting of output voltage from the output terminal, according to the output voltage output at the output terminal, wherein the control unit has a first hysteresis comparator, for controlling operation of the first switch, detecting the output voltage output at the output terminal, and/or a second hysteresis comparator, for controlling outputting of the output voltage, detecting the output voltage output at the output terminal.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: October 6, 2020
    Assignee: Asahi Kasei Microdevices Corporation
    Inventor: Teppei Hayashi
  • Patent number: 10784771
    Abstract: A power converter circuit includes multiple phases and controller circuitry. The multiple phases collectively operate to produce an output voltage to power a load. The controller circuitry monitors an output voltage and produces control information to control the multiple phases. Controller circuitry in each respective phase of the multiple phases processes the control information independently with respect to other phases to determine whether to output a quantum of energy to maintain regulation of the output voltage. In one arrangement, the control information provides general information indicating, such as for each control cycle, how much current is needed to supply to a load to maintain the output voltage. In a specific arrangement, identities of the phases are randomized over each of multiple cycles so that randomly chosen, but an appropriate number of phases is activated to supply current to the load.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: September 22, 2020
    Assignee: Infineon Technologies Austria AG
    Inventor: Venkat Sreenivas
  • Patent number: 10775825
    Abstract: An adapter module includes an adapter unit and an adapter cable. The adapter unit includes a control unit, and the adapter cable includes a data transmission line and a voltage control unit. The control unit is a power delivery controller. The control unit receives a reference voltage provided from the voltage control unit through a data transmission terminal, and the control unit controls the adapter unit to provide a fixed voltage to a load according to the reference voltage.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: September 15, 2020
    Assignee: Delta Electronics, Inc.
    Inventors: Hung-Sheng Hsieh, Yueh-Feng Cheng
  • Patent number: 10775820
    Abstract: A voltage regulator includes an error amplifier configured to amplify a difference between a feedback voltage and a reference voltage. The regulator also includes an N-type metal-oxide-semiconductor (NMOS) driver circuit. The driver circuit includes an n-type field effect transistor. The driver circuit is communicatively coupled to output of the error amplifier. The regulator further includes a feedback circuit communicatively coupled between the NMOS driver circuit and an input of the error amplifier to provide the feedback voltage.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: September 15, 2020
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventors: Raghuveer Murukumpet, James Bartling
  • Patent number: 10778098
    Abstract: A power supply system, which has a switched-tank converter with an adjustable conversion ratio, includes a first-stage power converter, a second-stage power converter, and a controller. The first-stage power converter converts a supply voltage to a first output voltage, and modulates the first output voltage according to a modulation signal. A second-stage power converter converts the first output voltage to a second output voltage, and generates a power signal according to the output power of the second output voltage. The controller determines, according to the power signal, whether the output power exceeds a threshold to generate the modulation signal.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: September 15, 2020
    Assignee: WIWYNN CORPORATION
    Inventors: Cheng Chung Yang, Po-Chia Huang
  • Patent number: 10778083
    Abstract: A power converter includes a primary side with switch devices that form a power transfer stage, and a secondary side with switch devices that form a rectification stage and an output filter coupled to the rectification stage and including an output inductor and output capacitor. A transformer couples the primary and secondary sides. The switch devices are controlled in DCM (discontinuous conduction mode) to transfer energy from the primary side to the secondary side during a power transfer interval in which one branch of the power transfer stage is conducting, one branch of the rectification stage is conducting and another branch of the rectification stage is blocking. As a voltage of the transformer first begins to rise at the start of a new power transfer interval in DCM, the branch of the rectification stage that is to be conducting during the new power transfer interval is hard switched on.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: September 15, 2020
    Assignee: Infineon Technologies Austria AG
    Inventors: Manuel Escudero Rodriguez, Matteo-Alessandro Kutschak
  • Patent number: 10763744
    Abstract: Disclosed are a PFC controller and a method of controlling the PFC controller. The PFC controller can include: a voltage controller configured to control a PFC output terminal voltage using a PFC output terminal voltage value and a PFC output terminal requirement voltage value; a current controller configured to control a PFC input terminal current by deriving a PFC input terminal requirement current value using an output of the voltage controller and by deriving a PFC duty using the PFC input terminal requirement current value and a PFC input terminal current value; and a distortion compensator configured to monitor an input voltage of an input power source, determine whether the input voltage is distorted, and prevent a divergence of the PFC input terminal current by transmitting a distortion frequency to the current controller when the input voltage is distorted.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: September 1, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Gi Bong Son, Gyu Tae Choi, Hui Sung Jang, Hyun Wook Seong
  • Patent number: 10761549
    Abstract: Various electronics systems may benefit from appropriate limitation of short-to-ground current. For example, sensor systems may benefit from a voltage sensing mechanism to minimize short-to-ground current for low drop-out and bypass mode regulators. A system can include a first power transistor configured to operate in a low drop-out mode. The system can also include a short to ground sensor configured to control current to the first power transistor. The short to ground sensor can be configured to limit a maximum short-circuit current below a predefined load current capability.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: September 1, 2020
    Assignee: Microsemi Corporation
    Inventors: Subhasis Sasmal, Jebas Paul Daniel T, Naveen Cannankurichi, Bernard Drexler
  • Patent number: 10719097
    Abstract: A voltage regulation circuit is suitable to provide an output voltage to a core circuit. The voltage regulation circuit includes a pad, a pull-low unit, a first controlling unit, a second controlling unit and a voltage regulation circuit. The pad receives and provides an input voltage. The pull-low unit generates a pull-low voltage according to the input voltage. The first controlling unit generates a first controlling signal according to the input voltage and the pull-low voltage. The second controlling unit generates a second controlling signal according to the input voltage and the first controlling signal. The voltage regulation unit regulates the input voltage according to the first controlling signal and the second controlling signal, so as to generate the output voltage.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: July 21, 2020
    Assignee: VANGUARD INTERNATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Jung-Tsun Chuang, Shao-Chang Huang, Wen-Tsung Wang, Chieh-Yao Chuang, Chi-Hung Lo
  • Patent number: 10715043
    Abstract: A single inductor multiple output SIMO power converter and method are presented. The converter has a single inductor and at least two output terminals which are denoted as first output terminal and second output terminal. The SIMO power converter also has a first switching element and a second switching element. The first switching element is coupled between an output terminal of the inductor and the first output terminal of the SIMO power converter. The second switching element is coupled between the output terminal of the inductor and the second output terminal of the SIMO power converter. The SIMO power converter also has a control circuit to detect an overload condition at the first output terminal, and to generate control signals for controlling the switching of the first switching element and the second switching element based on the detected overload condition.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: July 14, 2020
    Assignee: Dialog Semiconductor (UK) Limited
    Inventor: Lourans Samid
  • Patent number: 10693387
    Abstract: A transformer is provided between a power supply and a load, and includes a front stage circuit and a rear stage circuit each having a function of performing switching so as to alternately invert a polarity of output relative to input. The transformer further includes: a series unit provided in at least one of both circuits and composed of a pair of reactance elements connected in series to each other via a connection point; and a switch device which, with both ends of the series unit serving as a first port, causes a part between one end of the series unit and the connection point, and a part between the other end of the series unit and the connection point, to serve as a second port alternately through switching while inverting a polarity, and executes power transmission from the first port to the second port or vice versa.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: June 23, 2020
    Assignees: Sumitomo Electric Industries, Ltd., National University Corporation Toyohashi University of Technology
    Inventors: Hideaki Nakahata, Kenichi Hirotsu, Nobuo Shiga, Takashi Ohira, Kyohei Yamada, Daiya Egashira
  • Patent number: 10637344
    Abstract: A source-grounded amplifier circuit supplied with a signal of an error amplifier circuit, and an output transistor supplied with a control voltage of the source-grounded amplifier circuit are provided. The source-grounded amplifier circuit has, in a signal path, a current limiting circuit including a cascode circuit controlled by a voltage having a positive temperature coefficient. A voltage regulator capable of reducing a dropout voltage of an output voltage without exceeding a gate breakdown voltage of the output transistor is provided.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: April 28, 2020
    Assignee: ABLIC INC.
    Inventors: Tsutomu Tomioka, Masakazu Sugiura
  • Patent number: 10622908
    Abstract: In described examples, an isolated DC-DC converter includes an input node for receiving an input voltage, and a transformer including a primary side having first and second terminals and a ground. First and second high-side switches are coupled between the input node and the first and second terminals, respectively. A first low-side switch is coupled between the first terminal and the ground, and through a first voltage limiter to be activated by a voltage at the second terminal. A second low-side switch is coupled between the second terminal and the ground, and through a second voltage limiter to be activated by a voltage at the first terminal. A switch controller controls the high-side switches so that voltages across the high-side switches are alternatingly zero, using a current through the primary side to alternatingly charge one terminal to an input voltage and discharge the other terminal to a ground voltage.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: April 14, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Maurizio Granato, Giavanni Frattini, Shailendra Kumar Baranwal
  • Patent number: 10611363
    Abstract: Systems and methods for operating an inverter that is electrically coupled to a battery and an electric machine that provides propulsive force to vehicle are described. The systems and methods may selectively adjust a duty cycle of an inverter transistor responsive to battery voltage and a dead time between when a first transistor is deactivated and when a second transistor is activated.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: April 7, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Jiyao Wang, Felicia Sun
  • Patent number: 10601331
    Abstract: An AC-to-DC converter circuit includes DC-to-DC converter that in turn includes a secondary side circuit. The secondary side circuit includes a secondary winding, a pair of bipolar transistor-based self-driven synchronous rectifiers, a pair of current splitting inductors, and an output capacitor. Each of the synchronous rectifiers includes a bipolar transistor and a diode whose anode is coupled to the transistor collector and whose cathode is coupled to the transistor emitter. The current splitting inductors provide the necessary base current to the bipolar transistors at the appropriate times such that the bipolar transistors operate as synchronous rectifiers.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: March 24, 2020
    Assignee: Littlefuse, Inc.
    Inventor: Kyoung Wook Seok
  • Patent number: 10601332
    Abstract: In described examples, an isolated DC-DC converter includes: an input node for receiving an input voltage; a transformer including first and second terminals; first and second low-side switches; and first and second high-side switches. The first low-side switch is coupled between the first terminal and a primary side ground. The second low-side switch is coupled between the second terminal and the primary side ground. The first high-side switch is coupled between the first terminal and the input node and is configured to be activated by a voltage at the second terminal. The second high-side switch is coupled between the second terminal and the input node and is configured to be activated by a voltage at the first terminal. Further, the isolated DC-DC converter includes a switch controller to cause the first and second voltages to alternatingly be zero by opening and closing the first and second low-side switches.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: March 24, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Maurizio Granato, Giovanni Frattini, Shailendra Kumar Baranwal
  • Patent number: 10581337
    Abstract: A diode rectifier rectifies an AC voltage output from a neutral-grounding three-phase AC power supply to a DC voltage. A smoothing capacitor smoothes the DC voltage rectified by the diode rectifier. An inverter converts the DC voltage smoothed by the smoothing capacitor into a desired AC voltage. A bidirectional switch and a Y capacitor are connected in series between one end of the smoothing capacitor and the ground. A detector detects a voltage across both ends of the smoothing capacitor. A controller drives the bidirectional switch in response to an output of the detector.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: March 3, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasushige Mukunoki, Yasushi Nakayama, Hiroyasu Iwabuki, Yuki Ishii, Keisuke Iwasawa
  • Patent number: 10574154
    Abstract: A scalable universal space vector pulse-width modulation (SVPWM) scheme for multilevel inverters is disclosed. In the disclosed SVPWM scheme, the modulation triangle is quickly identified based on a coordinate transformation from an ?-? coordinate system to a 120° oblique coordinate system. Then, the duty cycles and switching states of the three vertices of the modulation triangle are determined by simple algebraic computations. In a switching period, any vertex of the modulation triangle can be flexibly selected as the start point to optimize the switching sequence with flexibly adjustable duty cycle(s) for the redundant switching state(s) according to specific applications.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: February 25, 2020
    Assignee: NUtech Ventures
    Inventors: Wei Qiao, Fa Chen, Liyan Qu
  • Patent number: 10571938
    Abstract: A method for controlling a value of a voltage at a conductor to which at least one secondary winding of a first steppable transformer and a secondary winding of a second steppable transformer are connected is provided. The method includes: if a voltage deviation of the voltage at the conductor from a voltage setpoint value is within a first range around the voltage setpoint value, and if an overall deviation of a sum of the voltage deviation and a reactive current deviation from the voltage setpoint value respectively for the first and the second transformer is outside of a second range, which is larger than the first, around the voltage setpoint value: setting a delay time for stepping the first transformer and/or the second transformer in such a way that stepping of the first or the second transformer that counteracts the voltage deviation is prioritized.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: February 25, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventors: Yuting Wang, Frank Mieske