Using A Three Or More Terminal Semiconductive Device Patents (Class 323/223)
  • Patent number: 11336204
    Abstract: A power inverter, such as a synchronous buck power inverter, that is configured with a high frequency switching control having a (PWM) controller and sensing circuit. Controller provides a low frequency oscillating wave to effect switching control on a synchronous-buck circuit portion that includes a plurality of switches to invert every half cycle of the frequency provided by controller. The inverting process thus creates a positive and negative transition of the oscillating wave signal. A low frequency switching stage includes a further plurality of switches configured to operate as zero voltage switching (ZVS) and zero current switching (ZCS) drives Charge on an output capacitor is discharged to zero on every zero crossing of low frequency switching stage and advantageously discharges energy every half cycle. During this discharge of energy, the zero crossing distortion in the low frequency sine wave is greatly reduced.
    Type: Grant
    Filed: October 13, 2020
    Date of Patent: May 17, 2022
    Assignee: JABIL INC.
    Inventors: Ronald Beebe, Christopher D. Compton, David Eckerson, Yizhe Liu, Salman Talebi
  • Patent number: 11290015
    Abstract: A driving circuit is disclosed. The driving circuit includes a charging circuit, coupled between a voltage source and a load, configured to form a first current from the voltage source to the load; and a discharging circuit, coupled between the voltage source and the load, configured to form a second current from the load back to the voltage source.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: March 29, 2022
    Assignee: xMEMS Labs, Inc.
    Inventor: Jemm Yue Liang
  • Patent number: 11262416
    Abstract: A diagnostic circuit is provided that diagnoses a connection state of a capacitor connected to an output terminal of a regulator that outputs a first voltage, the diagnostic circuit including: a switching circuit that performs, during a first period, a switching control process of switching an output voltage of the regulator to a second voltage that is higher than the first voltage; a detecting circuit that detects a variation in an output current of the regulator caused by the switching control process; and a determining circuit that determines the connection state of the capacitor, based on a detection result of the detecting circuit.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: March 1, 2022
    Inventors: Akio Tsutsumi, Naoki Yoshida
  • Patent number: 11139685
    Abstract: A method of determining one or more direct voltage reduction (DVR) factors at a point of load (POL) in a power grid voltage environment. An energy processing unit (EPU) is installed at each individual POL; each EPU includes at least one AC-AC series voltage regulator. An EPU-regulated output voltage is increased under specific controlled conditions. One or more independent DVR factors for each individual POL are determined during the increased and decreased EPU-regulated output voltage.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: October 5, 2021
    Assignee: Edge Electrons Limited
    Inventors: Ben Frickel, Julie Ann Estolonio, Shaira Joyce Prado, Gaia Maria Javier, Jian Carlo Decena Zapata, Gordon Currie, Neal George Stewart
  • Patent number: 11128123
    Abstract: A method for operating an electric gardening and/or forestry apparatus system having an accumulator, a gardening and/or forestry apparatus with an electric motor, and a protective electronic circuit including inputs which are connected to the accumulator, outputs which are connected to the gardening and/or forestry apparatus, and a switching element which is disposed in a power path between one of the inputs and one of the outputs.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: September 21, 2021
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Kay-Steffen Gurr, Martin Schurr, Andreas Mack, Christian Heigemeyr
  • Patent number: 11101730
    Abstract: A power supply circuit having a rectifier circuit that rectifies an AC voltage, an inductor, a transistor that controls an inductor current flowing through the inductor, a drive signal generating circuit that generates a drive signal based on the inductor current and an output voltage generated from the AC voltage, and a drive signal output circuit outputting the drive signal. The drive signal generating circuit includes a command-value output unit that outputs a command value for increasing and decreasing the inductor current when the output voltage is lower or higher than a target level, respectively, an inductance calculation unit that calculates an inductance of the inductor based on first and second current values of the inductor at first and second timings after the inductor current increases from zero and decreases, respectively, and an ON-period calculation unit that calculates an ON period in a switching period of the transistor.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: August 24, 2021
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji Yamada
  • Patent number: 10931277
    Abstract: A gate-charge harvester includes a harvest capacitor that has a first plate and a second plate. The second plate is coupled to a lower rail and the first plate is coupled to send a voltage towards a regulator. The gate-charge harvester also includes a low-side harvest transistor having a first terminal coupled to a gate of a low-side power transistor and a second terminal coupled to the first plate.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: February 23, 2021
    Assignee: Texas Instruments Incorporated
    Inventors: Stefan Dietrich, Josy Bernard, Christian Harder
  • Patent number: 10923274
    Abstract: A power supply device includes a current transformer module capable of adjusting a power induction ratio in order to induce a certain power even when the current of a power line is changed and the current transformer module capable of minimizing the loss in power conversion while providing a certain power even when the current of the power line is changed. The disclosed current transformer module includes a magnetic core constituting a closed loop, a plurality of unit coils wound around the magnetic core, and a switch unit connected to the plurality of unit coils, and the plurality of unit coils include a plurality of unit coils for power-generation.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: February 16, 2021
    Assignee: AMOSENSE CO., LTD.
    Inventors: Jin-Pyo Park, Won-San Na, Cheol-Seung Han
  • Patent number: 10910943
    Abstract: A bidirectional power factor correction (PFC) module is coupled to an AC power source, an energy storage unit, and a DC bus. The bidirectional PFC module includes a bridge arm assembly and a control unit. The bridge arm assembly includes a first bridge arm, a first inductor, a second inductor, and a second bridge arm. The control unit provides a plurality of control signals to control the first bridge arm and the second bridge arm to make the bidirectional PFC module operate in an AC power supply mode, a DC power supply mode, or a power feed mode.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: February 2, 2021
    Assignee: Delta Electronics, Inc.
    Inventors: Hung-Chieh Lin, Chao-Li Kao, Yi-Ping Hsieh, Jin-Zhong Huang, Chao-Lung Kuo
  • Patent number: 10867550
    Abstract: An organic light emitting diode display apparatus includes a display panel, a discharge circuit configured to discharge a voltage if the display panel is driven for more than a predetermined time and the supply of power to the display panel is interrupted, and a processor configured to, if the power is supplied, determine whether a cooling time required for afterimage compensation of the display panel is satisfied, and if the cooling time is satisfied, perform the afterimage compensation of the display panel.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: December 15, 2020
    Assignee: LG ELECTRONICS INC.
    Inventor: Hanseok Hwangbo
  • Patent number: 10797482
    Abstract: An active limiting switch includes a comparator and a power switch. The comparator is configured to compare a reference voltage with a sense voltage. The sense voltage is representative of a proportional approximation to power in a load being driven by a battery. The power switch is configured to be, in response to the reference voltage being less than the sense voltage, in an open state. The power switch is also configured to be, in response to the reference voltage being greater than the sense voltage, in a closed state creating a closed circuit between the battery and the load allowing the battery to provide a first amount of power to the load.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: October 6, 2020
    Assignee: National Oilwell Varco, L.P.
    Inventors: Matthew David Becker, Andrew McBain
  • Patent number: 10536078
    Abstract: A power conversion unit may include two or more power modules for providing high-voltage direct current power to electrical loads, such as one or more propulsion motors aboard an aerial vehicle. Each of the power modules may be controlled by hysteresis, and may include one or more pairs of transistors that are switched by a gate driver with respect to differences between a reference current and a sensed current passing through a boost inductor. The number, size and shape of the power modules may be selected to accommodate the electrical loads, and may be switched on or off, as necessary. The power conversion unit may feature at least one more power module than is required to meet all anticipated electrical loads, thereby ensuring that the power conversion unit may continue to provide power even in the event that one of the power modules experiences a fault of any kind.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: January 14, 2020
    Assignee: Amazon Technologies, Inc.
    Inventor: Joshua White Traube
  • Patent number: 10516388
    Abstract: A voltage generator includes a pulse circuit and a slope circuit. The pulse circuit is to apply voltages of three different levels to an output terminal and the slope circuit is to apply a slope voltage to the output terminal. The slope circuit includes an inductor to take current out of a capacitive load connected to the output terminal.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: December 24, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hye-jin Kim, Hyun-bae Kim, Ju-hyun Kim, Ji-hwan Kim, Chan-hee Park, Young-hwan Choi
  • Patent number: 10504769
    Abstract: A regulated high side gate driver circuit for power transistors. The regulated high side gate driver circuit includes a gate driver powered by a floating voltage regulator, which includes a linear regulating device.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: December 10, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Mikkel Høyerby, Allan Nogueras Nielsen
  • Patent number: 10412807
    Abstract: A lighting module including a light source with a carrier and at least two light emitters that are placed on the carrier and that have a common electrode; and a power-supplying electrical circuit for supplying the light emitters with power. The power-supplying electrical circuit includes a current source that is connected, via switches, to the light emitters of the light source, and a control circuit for controlling the switches, so as to allow each of the emitters to be selectively supplied with power by the current source.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: September 10, 2019
    Assignee: VALEO VISION
    Inventors: Lionel Dolmaire, Arnaud Faivre
  • Patent number: 10391957
    Abstract: Embodiments include a vehicle power distribution system comprising a vehicle battery having a nominal voltage; a plurality of electric loads, each load being associated with a rated voltage; and an integrated circuit coupled to the vehicle battery and comprising a plurality of solid-state circuitry blocks respectively coupled to the electric loads, each block including a circuit protection system and configured to supply the rated voltage associated with the electric load coupled to the block. Embodiments also includes a vehicle power distribution module comprising an integrated circuit configured to receive a first voltage from a vehicle battery and to supply respective rated voltages to a plurality of electric loads, the integrated circuit comprising a plurality of solid-state circuitry blocks, and each circuitry block including a circuit protection system and being coupled to a respective one of the electric loads.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: August 27, 2019
    Assignee: Ford Global Technologies, LLC
    Inventor: Amin Emrani
  • Patent number: 10176951
    Abstract: The constant voltage supplying circuit for a circuit breaker according the invention comprises: a first switching device; a constant current source configured to supply a constant current; a feedback circuit section commonly connected to an output terminal of each of the first switching device and the constant current source; a constant voltage source connected to the feedback circuit section, and configured to supply a constant voltage; a current adjusting circuit section connected to the output terminal of the first switching device, and configured to adjust an output current of the first switching device; and a divided voltage resistor section including a first resistor and a second resistor, and configured to provide a divided voltage of an output voltage of the constant voltage supplying circuit, to the feedback circuit section, through a connection node between the first resistor and the second resistor.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: January 8, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Jongkug Seon
  • Patent number: 10148099
    Abstract: A power supply circuit is provided that includes first and second power sources coupled in parallel, a first circuit path that provides reverse current blocking and reverse polarity protection associated with positive terminals of the respective first and second power sources, a second circuit path that bypasses current blocking of the first circuit path, a third circuit path that provides reverse polarity protection associated with negative terminals of the respective first and second power sources, and a bypass control circuit that controls the second circuit path based on determination of a predetermined condition.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: December 4, 2018
    Assignee: Carrier Corporation
    Inventors: Kimmo A. Kyllonen, John A. Seliski
  • Patent number: 10122255
    Abstract: Various embodiments of apparatuses, systems and methods for regulating the currents provided by a DCDC buck converters to an LED unit are provided. In accordance with at least one embodiment, a device includes a time-off module configured to output a time-off signal when an output voltage of a power supply reaches a predetermined threshold; a timer module configured to determine a first duration, and after waiting a second duration, output a measured time signal; and a control module, coupled to each of the timer module and the time-off module, configured to output a set signal during a current cycle of the power supply, wherein the “on” slate for the current cycle occurs while the control module outputs the set signal and ends when the control module receives the measured time signal.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: November 6, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Pavel Horsky, Jean-Paul Eggermont, Jan Plojhar, Martin Musil, Paul Andrem Decloedt
  • Patent number: 10075076
    Abstract: A voltage converter circuit includes a high side transistor, a high side driver coupled to a control input of the high side transistor, a low side transistor coupled to the high side transistor at a switch node, and a current steering circuit coupled to the control input of the high side and to the switch node. During transition of the high side transistor to an on state, a current from the high side driver initially divides between the control input of the high side transistor and the current steering circuit, and as a voltage on the switch node increases, less of the current from the high side driver flows through the current steering circuit and more of the current from the high side driver flows to the control input of the high side transistor.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: September 11, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Preetam Tadeparthy, Brian Carpenter, Nitin Agarwal
  • Patent number: 10037075
    Abstract: Voltage regulation techniques for electronic devices are described. In one embodiment, for example, an apparatus may comprise an electronic element comprising one or more integrated circuits, a voltage regulator to regulate an input voltage of the electronic element, the voltage regulator to source an output current comprising at least a portion of an input current of the electronic element, the voltage regulator to operate in a current-limiting mode to limit the output current when the input current exceeds a threshold current, and a capacitor bank comprising one or more capacitors, the capacitor bank to source a supplemental current to supplement the output current of the voltage regulator when the voltage regulator operates in the current-limiting mode. Other embodiments are described and claimed.
    Type: Grant
    Filed: April 2, 2016
    Date of Patent: July 31, 2018
    Assignee: INTEL CORPORATION
    Inventors: Brian J. Griffith, Viktor D. Vogman
  • Patent number: 9979294
    Abstract: A DC-DC converter includes an output power stage and a driver circuit. The output stage switches an input voltage to a switch node using a first transistor in response to a top-gate signal received at a top-gate node, and the switch node to ground using a second transistor in response to a bottom-gate signal received at a bottom-gate node. The driver circuit that provides the top- and bottom-gate signals in response to high- and low-side switch signals, respectively, activates the top-gate signal by actively regulating the top-gate node to a first voltage between a threshold voltage and a breakdown voltage of the first transistor using charge from the bottom-gate node, and activates the bottom-gate signal by actively regulating a second voltage provided to the bottom-gate node between a threshold voltage and a breakdown voltage of the second transistor using charge from the top-gate node.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: May 22, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Paul Jay Harriman, Andrea Bonelli, Dominique Romeo
  • Patent number: 9948190
    Abstract: A power control module for an electronic converter is disclosed. The electronic converter includes a power stage comprising two input terminals for receiving a first power signal and two output terminals for providing a second power signal. The electronic converter includes, moreover, a control circuit configured to control operation of the power stage as a function of a feedback control signal. In particular, the power control module includes a pre-elaboration module configured to generate a reference signal as a function of the feedback control signal and a first signal being representative of a voltage applied to the two input terminals. An error amplifier is configured to generate a modified control signal as a function the reference signal and a second signal being representative of a current flowing through the two input terminals.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: April 17, 2018
    Assignee: STMicroelectronics S.r.l.
    Inventor: Claudio Adragna
  • Patent number: 9935549
    Abstract: In accordance with presently disclosed embodiments, a 5-switch power conversion circuit that improves the power conversion efficiency (PCE) of a DC-DC converter with a double chopper topology is provided. The power conversion circuit adds minimal complexity through an additional switch, while preserving the benefits of a 3-level boost converter topology. The disclosed power conversion circuit uses four switches that are arranged in a 3-level boost converter arrangement, and a fifth switch that is connected in parallel with two of the other switches. The fifth switch helps to reduce the conduction power losses through the DC-DC converter by providing a one-switch ON-state conduction path instead of a two-switch path during part of the DC-DC power conversion cycle.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: April 3, 2018
    Assignee: Toshiba International Corporation
    Inventor: David Martin Westmoreland
  • Patent number: 9912246
    Abstract: The invention describes a bleeder circuit (1) realized for use in a dimmer (2) comprising a main AC switch (20) for switching a supply voltage (LINE) to a light non-linear load (L), which bleeder circuit (1) comprises a bleeder load (11) realized to provide operational assistance to main AC switch (20); wherein the bleeder load (11) is enabled on the basis of a switching signal (T20) of the main AC switch (20). The invention further describes a dimmer (2) comprising such a bleeder circuit (1). The invention also describes an electrical appliance comprising a light non-linear load (L) and such a dimmer (2). The invention further describes a method of dimming a light non-linear load (L).
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: March 6, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Miroslav Ilic, Lorethus Omambac Bahan, Ratko Milosavljevic
  • Patent number: 9868172
    Abstract: A power supply with a waveform control function is provided. The power supply includes a waveform type selector that selects a desired shape for an output waveform and a setpoint selector that sets an output setpoint for the power supply. The power supply further includes a waveform generator that generates a reference waveform signal. The waveform generator includes a target generation circuit that generates a plurality of target values corresponding to the reference waveform signal. The waveform generator also includes a transition circuit that performs a series of transitions between the plurality of target values to generate the reference waveform signal, and a ramp circuit that controls a ramp speed of at least one transition of the series of transitions based on the desired shape. The generation of a target value corresponding to a peak value of the reference waveform signal is based on at least the output setpoint.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: January 16, 2018
    Assignee: LINCOLN GLOBAL, INC.
    Inventor: Steven R. Peters
  • Patent number: 9853460
    Abstract: A power conversion circuit includes multiple input-side capacitors connected in series between input terminals; series circuits composed of high-side switching elements and low-side switching elements connected in parallel to the multiple input-side capacitors; and output-side capacitors connected between nodes and a node. The circuit further includes an output-side inductor connected to the node and a controller that alternately turns on and off the high-side switching elements and the low-side switching elements. Each of the low-side switching elements and the high-side switching elements is a MOSFET and causes current to flow from the low side to the high side using a body diode. Accordingly, there is provided a power conversion circuit that has high conversion efficiency and that is capable of realizing reduction in size, a power transmission system, and a power conversion system.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: December 26, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Keiichi Ichikawa, Tatsuya Hosotani
  • Patent number: 9690365
    Abstract: A processing device performs dual-rail power equalization for its memory cell array and logic circuitry. The memory cell array is coupled to a first power rail through a first switch to receive a first voltage level. The logic circuitry is coupled to a second power rail through a second switch to receive a second voltage level that is different from the first voltage level. The processing device also includes a power switch coupled to at least the second power rail and operative to be enabled to equalize voltage supplied to the memory cell array and the logic circuitry.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: June 27, 2017
    Assignee: MediaTek, Inc.
    Inventors: Hugh Thomas Mair, Yi-Te Chiu, Che-Wei Wu, Lee-Kee Yong, Chia-Wei Wang, Cheng-Hsing Chien, Uming Ko
  • Patent number: 9641078
    Abstract: A switching power supply device includes a switching output circuit, an error amplifier, a slope voltage generating circuit, a PWM comparator, a logic circuit, a switch driving circuit, and a reverse current detection circuit. The slope voltage generating circuit increases a slope voltage from a reset level with a gradient corresponding to an input voltage during an on period of the output transistor, and maintains the slope voltage at an offset level corresponding not to the reset level but to an output voltage during an off period of the output transistor.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: May 2, 2017
    Assignee: Rohm Co., Ltd.
    Inventor: Yosuke Fukumoto
  • Patent number: 9601942
    Abstract: Disclosed is a wireless power receiver to transfer power wirelessly received from a wireless power transmitter to a load. The wireless power receiver includes a first reception induction coil coupled with a reception resonant coil to receive AC power; a first rectifying diode to rectify the AC power received through the first reception induction coil; a second reception induction coil connected to the first reception induction coil and coupled with the reception resonant coil to receive the AC power; and a second rectifying diode to rectify the AC power received through the second reception induction coil, wherein the wireless power receiver changes a transferring path of the power provided to the load according to a polarity variation of the AC power received through the first and second reception induction coils.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: March 21, 2017
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Su Ho Bae
  • Patent number: 9537384
    Abstract: To provide a power supply noise reduction circuit and a power supply noise reduction method that do not require circuit elements to be increased in size and do not cause voltage drop in a power supply voltage. A power supply noise reduction circuit 10 that reduces noise included in a constant voltage output that is output from a power supply 2 to a load includes a first resistor 20 that is inserted into a power supply line L1 extending from the power supply 2 to the load, a filter 31 that is coupled to a load terminal of the first resistor 20 and outputs a first voltage that is obtained by reducing the noise from the constant voltage output, and a unity gain amplifier 32 that drives the first voltage output from the filter 31 and outputs the driven first voltage to the load terminal of the first resistor 20.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: January 3, 2017
    Assignee: ADVANTEST CORPORATION
    Inventor: Toshiyuki Sato
  • Patent number: 9391449
    Abstract: Of a wireless communication system, an RF tag which can operate normally even when a communication distance is extremely short, like the case where the RF tag is in contact with a reader/writer, whereby the reliability is improved. The RF tag which communicates data by wireless communication includes a comparison circuit which compares electric power supplied from outside with reference electric power and a protection circuit portion which is operated when the electric power supplied from outside is higher than the reference electric power in the comparison circuit.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: July 12, 2016
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kiyoshi Kato, Asami Tadokoro
  • Patent number: 9337732
    Abstract: A charge and discharge signal circuit includes: high side transistors connected in series; low side transistors connected in series; high side drive circuits; low side drive circuits; and a drive signal generation circuit, wherein each drive circuit includes: a high side level shifter; a high side capacitor switch string of a capacitor and a switch element connected in series, being connected in parallel with the high side transistor; and a high side drive part, to which an output of the high side level shifter is supplied, and each of the low side drive circuits includes: a low side level shifter; a low side capacitor switch string of a capacitor and a switch element connected in series, being connected in parallel with the low side transistor; and a low side drive part, to which an output of the low side level shifter is supplied.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: May 10, 2016
    Assignees: FUJITSU LIMITED, FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Masafumi Kondou, Koji Takekawa
  • Patent number: 9263935
    Abstract: A charge and discharge signal circuit includes: high side transistors connected in series; low side transistors connected in series; high side drive circuits; low side drive circuits; and a drive signal generation circuit, wherein each drive circuit includes: a level shifter; a capacitor switch string connected in series, being connected in parallel with the transistor; and a drive part, to which an output of the level shifter is supplied, at least one pair of neighboring ones of the level shifters are commonly formed, and two neighboring ones of the drive parts receive a same output from the common shifters.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: February 16, 2016
    Assignee: FUJITSU LIMITED
    Inventor: Masafumi Kondou
  • Patent number: 9226349
    Abstract: A semiconductor light source lighting circuit is provided with: a switching regulator that generates a drive current of a semiconductor light source using a switching element; and a control circuit that controls ON/OFF of the switching element. The control circuit is provided with: a comparator that compares the drive current and a target value; a counter that counts a digital value in a count direction determined by a comparison result of the comparator; a digital-analog converter that converts the digital value into an analog signal; and a drive circuit that controls the ON/OFF of the switching element based on the analog signal. The counter counts the digital value at a speed determined by an ON/OFF cycle of the switching element.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: December 29, 2015
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Satoshi Kikuchi, Takanori Namba, Masayasu Ito
  • Patent number: 9225199
    Abstract: Systems for harvesting energy from a variable output energy harvesting apparatus are disclosed. The systems include an energy harvesting apparatus for providing energy input to a switched mode power supply and a control loop for dynamically adjusting energy harvesting apparatus input to the switched mode power supply, whereby system output power is substantially optimized to the practical. Exemplary embodiments include systems for harvesting energy using solar cells in boost, buck, and buck-boost configurations.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: December 29, 2015
    Assignee: TRIUNE IP, LLC
    Inventors: Ross E. Teggatz, Wayne T. Chen, Brett Smith, Eric Blackall
  • Patent number: 8994342
    Abstract: A switching apparatus is disclosed that includes a first loop circuit configured to include a switching element, an inductive component and a capacitor; and a second loop circuit configured to share the inductive component with the first loop circuit, wherein the capacitor is inserted in series with the inductive component in the first loop, wherein the switching apparatus controls respective currents flowing through the first loop circuit and the second loop circuit in an alternating manner by turning on/off the switching element in order to control the current flowing through the inductive component, and wherein a first magnetic flux generated by the current flowing through the first loop circuit as the switching element is being turned on and a second magnetic flux generated by the current flowing through the second loop circuit as the switching element is being turned off head in the same direction.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: March 31, 2015
    Assignees: Toyota Jidosha Kabushiki Kaisha, Visteon Global Technologies, Inc.
    Inventors: Takayuki Naito, Takashi Imai, Koichi Mizutani, Kouichi Yamanoue, Shigeki Yamamoto
  • Patent number: 8994468
    Abstract: A modulation method is provided. The modulation method includes the steps of receiving multiple sinusoidal signals, obtaining the maximum value of the sinusoidal signals, obtaining the median value of the sinusoidal signals, and obtaining the minimum value of the sinusoidal signals within a period to generate a difference between the maximum value and the minimum value, generating a difference according to an upper limit and a lower limit of a predetermined comparison value, and comparing the two differences to generate an optimized modulation signal.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: March 31, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Shih-Hsiang Chien, Yong-Kai Lin, Chin-Hone Lin
  • Patent number: 8963517
    Abstract: A transistor includes a gate, a source, and a drain, the gate is electrically connected to the source or the drain, a first signal is input to one of the source and the drain, and an oxide semiconductor layer whose carrier concentration is 5×1014/cm3 or less is used for a channel formation layer. A capacitor includes a first electrode and a second electrode, the first electrode is electrically connected to the other of the source and the drain of the transistor, and a second signal which is a clock signal is input to the second electrode. A voltage of the first signal is stepped up or down to obtain a third signal which is output as an output signal through the other of the source and the drain of the transistor.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: February 24, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Hiroyuki Miyake, Masashi Tsubuku, Kosei Noda
  • Patent number: 8933678
    Abstract: A buck voltage converting apparatus is disclosed. The buck voltage converting apparatus includes a first transistor, a second transistor, an inductor, a controller and a switch. The first transistor receives an input voltage. A first terminal of the inductor is coupled to the first and second transistors. A second terminal of the inductor is coupled to an output terminal of the buck voltage converting apparatus for generating an output voltage. The controller receives the output voltage, and generates a detection voltage according to voltage amplitude of the output voltage. The switch is coupled between a first terminal of the first transistor and a control terminal of the second transistor. The switch is turned on or off according to the detection voltage.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: January 13, 2015
    Assignee: Excelliance MOS Corporation
    Inventors: Pao-Chuan Lin, Su-Yuan Lin, Hung-Che Chou
  • Patent number: 8933704
    Abstract: A device for testing capacitive loads of a power supply includes a controller, a power supply switching circuit, a capacitive load switching circuit, and a current sampling circuit. The power supply switching circuit selects one of output voltages of the power supply to be electronically connected to the capacitive load switching circuit and the current sampling circuit. The current sampling circuit samples an output current of one output of the power supply selected by the controller. The controller turns on and off switches of the capacitive load switching circuit for matching an output current of the power supply with a reference current until the output current equals to the reference current. The controller outputs a total magnitude of the capacitive loads.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: January 13, 2015
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Yun Bai, Fu-Sen Yang, Song-Lin Tong
  • Patent number: 8928301
    Abstract: A control circuit adjusts the duty cycle of a PWM control signal. An analog processing component within the control circuit receives an analog feedback input signal and compares it to an analog reference signal to generate a pre-processed signal. A sigma-delta modulator within the analog processing component generates a quantized signal based on the pre-processed signal. A digital processing component stores a value. The controller then adjusts the duty cycle of the PWM signal to correspond to the value. A clock keeps the system synchronized.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: January 6, 2015
    Assignee: Atmel Corporation
    Inventor: Andreas Schubert
  • Patent number: 8917066
    Abstract: A system for managing shunt utilization among multiple power converters sharing a common DC bus is disclosed. Each power converter includes a shunt device, typically one or more power resistors, configured to dissipate power from the DC bus. The power converter is configured according to an initial set of configuration parameters to selectively connect the shunt device to the DC bus. Each power converter monitors the amount of power being dissipated from the DC bus via the shunt device connected to that power converter and determines a utilization rate for the shunt device. As the utilization rate increases, the configuration parameters are modified to less frequently connect the shunt device to the DC bus. As the utilization rate decreases, the configuration parameters are modified to more frequently connect the shunt device to the DC bus.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: December 23, 2014
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Gerry M. Nagel, Ryan J. Jwanouskos
  • Patent number: 8916764
    Abstract: An output ripple voltage average amplitude of a switch mode DC-DC converter is dynamically maintained. The converter has a switch and an output filter. By varying a switching period (TPERIOD) of the switch, VRIPPLE is maintained at a substantially constant value over a first range of converter input voltages and a second range of switch duty cycles. Where the output filter includes an inductor having inductance (L) and a capacitor having capacitance (C) the average amplitude of VRIPPLE is dynamically maintained by varying TPERIOD with respect to switch duty cycle (D) and input voltage (VIN) so as to approximately satisfy the following relationship: TPERIOD=(VRIPPLE*8*L*C)0.5/(VIN*(D?D2)).5.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: December 23, 2014
    Assignee: Xandex, Inc.
    Inventor: Steven P. Weir
  • Patent number: 8912768
    Abstract: An apparatus provides a soft-switched voltage clamp tapped-inductor step-up boost converter that is capable of reducing voltage stress on a switch and a diode of the boost converter without using a dissipative snubber and that is capable of reducing a switching loss while maintaining a high input-to-output boost ratio.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: December 16, 2014
    Assignee: Inter. M Corporation
    Inventor: Soon Koo Cho
  • Patent number: 8866451
    Abstract: A power supply apparatus includes a first power factor correction circuit, a second power factor correction circuit and a control circuit that includes a first switching control unit that outputs a first switching signal for controlling a first switching element of the first power factor correction circuit generated in accordance with a detected result by an output voltage of the first power factor correction circuit and a current flowing through the first switching element, and a second switching control unit that outputs a second switching signal for controlling a second switching element of the second power factor correction circuit generated in accordance with a detected result by an output voltage of the second power factor correction circuit and a current flowing through the second switching element.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: October 21, 2014
    Assignee: Ricoh Company, Ltd.
    Inventor: Takeshi Iwata
  • Patent number: 8860385
    Abstract: A system and method for providing a voltage controlled current source for bus regulation is disclosed. A bus current delivered to an electrical bus from a current source is controlled using a synchronous switch according to a PWM duty cycle. Further, the PWM duty cycle is controlled to be proportional to an error signal based on a comparison of a voltage of the electrical bus to a reference voltage.
    Type: Grant
    Filed: January 30, 2011
    Date of Patent: October 14, 2014
    Assignee: The Boeing Company
    Inventor: Robert Matthew Martinelli
  • Patent number: 8847564
    Abstract: A freewheeling MOSFET is connected in parallel with the inductor in a switched DC/DC converter. When the freewheeling MOSFET is turned on during the switching operation of the converter, while the low-side and energy transfer MOSFETs are turned off, the inductor current circulates or “freewheels” through the freewheeling MOSFET. The frequency of the converter is thereby made independent of the lengths of the magnetizing and energy transfer stages, allowing far greater flexibility in operating and converter and overcoming numerous problems associated with conventional DC/DC converters. In one embodiment the freewheeling MOSFET is an N-channel MOSFET with its body connected to circuit ground and not shorted to either its source or its drain.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: September 30, 2014
    Assignee: Advanced Analogic Technologies, Incorporated
    Inventor: Richard K. Williams
  • Patent number: 8829865
    Abstract: The disclosure provides a power factor correcting (PFC) circuit, a power supply and a method of manufacturing a power converter. In one embodiment, the PFC circuit has a positive input terminal, an output terminal and a ground terminal and includes: (1) a power factor inductor coupled in series between the positive input terminal and the output terminal, (2) a main switch configured to periodically connect the power factor inductor to the ground terminal and (3) a clamping capacitor coupled to the power factor inductor and configured to provide zero turn-off loss for the main switch.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: September 9, 2014
    Assignee: General Electric Company
    Inventor: Moshe Domb
  • Patent number: 8829866
    Abstract: DC to DC converters are described that include two converters interconnected and operated to mitigate at least some of the effects of low duty cycle operation.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: September 9, 2014
    Assignee: Volterra Semiconductor Corporation
    Inventor: Patrice Lethellier