Patents Examined by Yemane Mehari
  • Patent number: 10331151
    Abstract: Systems and devices are provided for generating a process, voltage, temperature (PVT)-independent reference current in a resource-efficient manner. A semiconductor device may include a bandgap circuit that outputs a reference voltage and gate signal. The semiconductor device may also include a reference current circuit that includes a complementary-to-absolute-temperature (CTAT) current generation portion and a variation-independent reference current generation portion. The variation-independent reference current generation portion may receive the gate signal from the bandgap circuit, apply the gate signal to a proportion-to-absolute temperature (PTAT) branch of the variation-independent reference current generation portion, and generate mirror PTAT and CTAT currents. The reference current circuit may also include a reference node that generates the reference current supply based at least in part on the mirror CTAT current and the mirror PTAT current.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: June 25, 2019
    Assignee: Micron Technology, Inc.
    Inventor: Wei Lu Chu
  • Patent number: 10333428
    Abstract: Present invention provides resonant load power conversion device capable of decreasing switching frequency of each switching element and reducing the number of main circuit conductors. Resonant load power conversion device has single-phase inverter whose DC input side (Vdc) is connected to DC voltage source and whose output side (Vout) is connected to resonant load and which outputs rectangular wave voltage at resonance frequency. Resonant load power conversion device includes switch group circuits 100U, 100V, 100X, 100Y connected to respective upper and lower arms of input and output sides of single-phase inverter and configured so that N (N=integer of 2 or more) series bodies each having 2 switching elements are connected parallel by main circuit conductors, and controller switching each switching element (U11 to U32, V11 to V32, X11 to X32, Y11 to Y32) of switch group circuits 100U, 100V, 100X, 100Y by time division of 1/(M×N).
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: June 25, 2019
    Inventor: Yasuhiro Kondo
  • Patent number: 10332668
    Abstract: A copper winding structure includes a first copper sheet having a first body, a first extending part and a second extending part located at two ends of the first body, respectively; and a second copper sheet having a second body, a third extending part and a fourth extending part located at two ends of the second body, respectively, the third extending part intersects with the fourth extending part such that the second body is partially overlapped; after the first copper sheet is stacked with the second copper sheet, the second extending part aligns with the third extending part, and the first extending part and the fourth extending part are located on the same side with respect to the second extending part and the third extending part.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: June 25, 2019
    Inventors: Zengyi Lu, Xingkuan Guo, Chunmei Wang, Jun Sun
  • Patent number: 10324480
    Abstract: A multiphase voltage regulator includes a plurality of phases and a controller. Each phase is configured to output a phase current to a load through an inductor in response to a control signal input to the phase. The controller is operable to: generate the control signals input to the phases; set a switching frequency of the control signals to a first value; and change the switching frequency from the first value to a second value different than the first value if the load current changes repetitively at a frequency that is within a predetermined range of the first value of the switching frequency. A corresponding method of operating the multiphase voltage regulator is also provided.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: June 18, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Zhiqing You, Tim Ng, Amir Babazadeh, Jinghong Guo, Benjamim Tang
  • Patent number: 10320303
    Abstract: A system and a method offset the effect of a reduced load current on a power factor controller connected to a DC-to-DC converter having a switching DC-to-AC inverter driving an output rectifier that produces the load current. A frequency-dependent load impedance is coupled to the output of the inverter. The frequency-dependent load impedance is configured to have a first impedance when the inverter is operating at the minimum operating frequency. The frequency-dependent load impedance has a second impedance when the inverter is operating at the maximum operating frequency. The second impedance is lower than the first impedance and produces a dummy load current that is added to the actual load current to provide a sufficient total load current to cause the power factor controller to operate in a continuous mode even when the actual load current is insufficient to cause the power factor controller to operate in a continuous mode.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: June 11, 2019
    Assignee: Universal Lighting Technologies, Inc
    Inventor: Wei Xiong
  • Patent number: 10312800
    Abstract: An AC-DC converter that converts a rectified voltage of an AC power supply AC to a DC output voltage by switching ON and OFF a switching device and controls the switching device by using a command value for and a detected value of the DC output voltage as well as a detected value of a reactor current includes: a current sense resistor and a low-pass filter for detecting a rectified current; a proportional controller that multiplies the detected value of the rectified current by a prescribed gain; an output voltage command calculator such as a divider that calculates an output voltage command for the switching device on the basis of an output of the proportional controller; and a circuit that compares the output voltage command to a carrier signal in order to generate a gate signal for the switching device, wherein the prescribed gain is effectively adjusted on the basis of a difference signal between a command value for and a detected value of the DC output voltage.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: June 4, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji Yamada
  • Patent number: 10312823
    Abstract: A power inverter comprising a power inverter circuit to convert alternating current (AC) power to direct current (DC) power, a condition monitoring system, a wired and/or wireless communication circuit, and a manual/automatic power selection capability. The power inverter can additionally include a remote controller and power inverter remote unit, a vehicle monitoring system, and an association with a portable computing device application. The power inverter remote unit replicates a power inverter controller circuit of the power inverter and provides additional alternating current (AC) output socket(s). The application is adapted to be run on a portable computing device and could include features to remotely activate and/or configure the inverter, obtain inverter operating characteristics, obtain error notifications, and monitor a vehicle status and/or operating history. The power inverter can additionally include a DC charging circuit, converting DC power to AC power.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: June 4, 2019
    Inventors: Nicholas Montgomery, Jose Illidge
  • Patent number: 10312799
    Abstract: In one form, a power factor correction (PFC) controller, comprising includes a regulation circuit, a dead-time detection circuit, and a pulse width modulator. The regulation circuit provides a control voltage in response to a feedback voltage received at a feedback input terminal, wherein the feedback voltage is proportional to an output voltage. The dead-time detection circuit has an input coupled to a zero current detection input terminal, and an output for providing a dead-time signal. The pulse width modulator is responsive to the control voltage and the dead-time signal to provide a drive signal that controls conduction of a switch to improve a power factor of an offline converter, wherein the pulse width modulator modulates both an on-time and a switching period of the drive signal using the dead-time signal in a discontinuous conduction mode.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: June 4, 2019
    Inventors: Joel Turchi, Radim Mlcousek, Lukas Olivik
  • Patent number: 10310525
    Abstract: Provided is an electronic device which can easily measure a standby current of an internal circuit of an electronic device after burn-in. The electronic device includes: a power source terminal; a regulator that generates a predetermined voltage from a voltage of the power source terminal; an internal circuit that is operated by an output voltage of the regulator; and a standby terminal through which the regulator and the internal circuit are set to a low power consumption state.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: June 4, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Masahiro Matsumoto, Hiroshi Nakano, Yoshimitsu Yanagawa, Akira Kotabe
  • Patent number: 10298146
    Abstract: A method of controlling the stability of a power converter in a closed-loop control system. The method includes inputting a variable to be controlled such as an output voltage of the power converter to a compensator or mathematical function for processing; determining, using the compensator, an error signal representative of a difference between the output voltage and a reference voltage; evaluating an energy content in a short-time Fourier transform spectrogram of the error signal from the compensator and/or evaluating the sinusoidality shape of the error signal; updating a transfer function of the compensator and other system parameters in accordance with the energy content or sinusoidality.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: May 21, 2019
    Inventor: Jaber A. Abu Qahouq
  • Patent number: 10298145
    Abstract: A power converter 1 includes: a power module 20 that converts direct-current electric power to three-phase alternating-current electrical power and outputs the three-phase alternating-current electrical power from three-phase terminals; an output bus bar 24 that has motor terminals 26 and a plurality of power module terminals 25 that are connected to the power module 20; a bus bar holder 23 holding the output bus bar 24; and a case 2 that has a through hole 3 through which the output bus bar 24 penetrates and that accommodates the power module 20, the output bus bar 24, and the bus bar holder 23. The three-phase terminals are arranged side-by-side on the power module 20. The plurality of power module terminals 25 are respectively formed on the output bus bar 24 so as to correspond to the three-phase terminals, and the plurality of power module terminals 25 are positioned on the three-phase terminals when the output bus bar 24 and the power module 20 are accommodated in the case 2.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: May 21, 2019
    Inventors: Fumihiro Okazaki, Gen Okuzuka, Yuuichirou Nomura, Masaharu Nagano
  • Patent number: 10284112
    Abstract: A circuit arrangement for use in a power conversion stage and a method of controlling a power conversion stage includes at least two electronic devices connected in series, the at least two electronic devices including at least one active power electronic device operable in a plurality of operation states including an active linearly operated state; wherein the at least one active power electronic device is arranged to be controlled and to operate in the plurality of operation states in each of a plurality conversion cycles, such that a generation of electric harmonics in the power conversion stage is suppressed during an operation of the power conversion stage.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: May 7, 2019
    Inventors: Shu Hung Henry Chung, Kewei Wang
  • Patent number: 10284087
    Abstract: In the present invention a switching control circuit 130 has: a slope voltage generation unit 131 that generates slope voltages Vs1 and Vs2 that are opposite in phase and intersect each other; comparators 132 and 133 that respectively compare the slope voltages Vs1 and Vs2 and a control voltage Vc, and generate comparison signals S1 and S2; and a logical operation unit 134 that generates a step-down control signal D0 and a step-up control signal U0 from the comparison signals S1 and S2. The step-down control signal D0 and the step-up control signal U0 are used to control the switching of a step-up/step-down DC/DC converter.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: May 7, 2019
    Assignee: Rohm Co., Ltd.
    Inventor: Tetsuo Tateishi
  • Patent number: 10284095
    Abstract: A multi-phase DC-to-DC buck converter for receiving an input voltage and delivering an output voltage to a load by splitting the load current between a plurality of DC-to-DC buck converter cells. The converter includes a plurality of current sense circuits for sensing current in a respective converter cell, each of the current sense circuits configured to generate a respective current sense signal, an averaging circuit for receiving each of the respective current sense signals and generating an average signal, a plurality of imbalance detector circuits for comparing a respective current sense signal with the average signal and generating a respective current imbalance signal, and a plurality of ON time generators for activating a converter cell for a predetermined time interval and altering the predetermined time interval in accordance with a time integral of a respective current imbalance signal.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: May 7, 2019
    Inventors: Alexander Mednik, Ioan Stoichita, Surya Talari
  • Patent number: 10277124
    Abstract: Provided are a boosting unit, a DC-DC converter including the boosting unit, and an electric vehicle. The DC-DC converter includes: a switch connected to an input voltage; a main diode connected to the switch; a regulating capacitor, a first terminal of the regulating capacitor being connected in series with the main diode, a second terminal of the regulating capacitor being connected to the input voltage, and the first terminal and the second terminal of the regulating capacitor serving as output terminals of the DC-DC converter; and a boosting unit, the boosting unit comprising a first inductor, a second inductor, a boosting capacitor, a first unidirectional conducting device, a second unidirectional conducting device, a third unidirectional conducting device and a fourth unidirectional conducting device. According to the embodiments of the present disclosure, voltage gain can be increased by replacing inductors in the ordinary DC-DC converter with the boosting unit.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: April 30, 2019
    Inventors: Enhui Guan, Masakazu Okamura, Shuo Chen
  • Patent number: 10263521
    Abstract: Various methods and devices that involve control circuits for power converters are disclosed. One method comprises controlling a switch using a control signal based on a comparison signal. The switch controls a transfer of power between an input node, which receives an input, and an output node. The method comprises measuring an output of the power converter, generating an error signal based on the output, generating a periodic ramp signal with a varying period, providing the error signal to a first input terminal of a comparator, providing the ramp signal to a second input terminal of the comparator, and generating the comparison signal based on the error signal and the ramp signal using the comparator. The method comprises increasing a slope of the ramp signal in response to an increase in the input, and increasing the slope of the ramp signal in response to a decrease in the varying period.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: April 16, 2019
    Assignee: Silanna Asia Pte Ltd
    Inventor: Trevor M. Newlin
  • Patent number: 10263523
    Abstract: A DC-DC converter with a programmable pulse time limit. A charge pulse begins when the output voltage reaches a minimum threshold and terminates in response to a discharge indication, in which charge current flows through an inductive element while the charge pulse is provided. The discharge indication is provided to initiate a discharge pulse when the charge current reaches a peak threshold, which terminates in response to a reset indication. Current is discharged from the inductive element during the discharge pulse. A zero crossing detector provides the reset indication when the discharge current reaches a minimum level. A programmable timing circuit limits a duration of either one or both of the charge pulse and the discharge pulse to prevent hangup or excessive output voltage ripple. The DC-DC converter may include a memory that stores a digital value used to program the programmed time duration of the programmable timing circuit.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: April 16, 2019
    Assignee: Silicon Laboratories Inc.
    Inventors: Jeffrey L. Sonntag, Joselyn Torres-Torres, Michael D. Mulligan
  • Patent number: 10254776
    Abstract: This application relates to methods and apparatus for voltage regulation. Embodiments relate to signal processing circuit (300) having a first and second processing path with respective first and second inputs (INP and INN). The first and second processing paths have respective first and second virtual earth nodes (108P and 108N) at the input to a differential integrator (106). A differential feedback path is configured to apply a feedback signal to each of the first and second virtual earth nodes so as to minimize any voltage difference between them. A regulator (301) is operable to monitor a voltage at one of the virtual earth nodes (108P) against a reference voltage (VREF) and to generate a regulation signal to maintain the voltage at said monitored one of the first and second virtual earth nodes to be equal to the reference voltage. The regulation signal is applied to both of the first and second virtual earth nodes.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 9, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: David Paul Singleton, Kapil Sharma
  • Patent number: 10256738
    Abstract: The present invention is related to a method for controlling a high frequency dual bridge DC/DC power converter of nominal frequency (fN) and nominal power (PN), in a wide range of input voltage and with power overload capacity up to 200%, said method comprising a step of varying, in a range up to the value of ? radians, a first phase shift (?HB) between the voltage of the full bridge and the voltage of the half bridge, while—varying the operation frequency (f) simultaneously with the said first phase shift and/or—inducing a second phase shift (?FB) between the voltages of the two half bridges or branches constituting the full bridge, modifying thereby the first phase shift (?HB) between the voltage of the full bridge and the voltage of the half bridge and/or—decreasing the operation frequency (f) towards the LC resonance frequency (f0) of the circuit, so as to minimize the switch losses in the DC/DC converter during operation.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: April 9, 2019
    Assignee: Constructions Electroniques + Télécommunications
    Inventors: Paul Bleus, Thierry Joannes, François Milstein, Fabrice Frebel
  • Patent number: 10248145
    Abstract: A voltage regulator to provide a load current at an output node is presented. The voltage regulator has a pass transistor for providing the load current at the output node from an input node. The voltage regulator contains a driver stage to set a gate voltage at a gate of the pass transistor based on a drive voltage at a gate of a drive transistor. The voltage regulator has voltage regulation means to set the drive voltage in dependence of an indication of the output voltage at the output node and in dependence of a reference voltage for the output voltage. The driver stage has the drive transistor and a diode transistor, wherein the diode transistor forms a current mirror with the pass transistor. The driver stage has a current amplifier amplifies a drive current through the drive transistor to provide an amplified current through the diode transistor.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: April 2, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Dan Ciomaga, Mihail Jefremow, Stephan Drebinger, Fabio Rigoni