Patents by Inventor Kezhi WANG

Kezhi WANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200168201
    Abstract: A method of processing for sound effect of recording and a mobile terminal are disclosed in embodiments of the present disclosure. The method includes recording N audio signals generated from N sound sources, N being an integer greater than or equal to 2; obtaining location relationships of the N sound sources, determining a scene where the N sound sources are located in, and determining a reverberation algorithm according to the location relationships of the N sound sources and the scene where the N sound sources are located in; and performing a sound effect processing for the N audio signals according to the reverberation algorithm to obtain a reverbed sound effect.
    Type: Application
    Filed: November 8, 2019
    Publication date: May 28, 2020
    Inventors: Kezhi Zhu, Jian Wang, Fenggui Yan
  • Patent number: 10193465
    Abstract: A DC/DC conversion apparatus includes a DC voltage source that outputs a DC power supply voltage, an oscillation circuit electrically connected to the DC voltage source, switch elements, a switch controller that connects or disconnects electrical connection between the DC voltage source and the oscillation circuit by switching turn-on and turn-off of the switch elements, and switches a direction of a voltage applied to the oscillation circuit between a first direction and a second direction, and a transformation circuit that outputs a current generated in the oscillation circuit and converts the current into a DC current.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: January 29, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Jiale Dai, Yu Cao, Kezhi Wang
  • Patent number: 10014782
    Abstract: A DC/DC conversion apparatus includes a DC voltage source, an oscillation circuit being electrically connected to the DC voltage source, a plurality of switch elements, a switch controller, which closes or opens electrical connection between the DC voltage source and the oscillation circuit by switching turn-on and turn-off of the plurality of switch elements, and switches a direction of a voltage applied on the oscillation circuit between a first direction and a second direction, a transformation circuit, a detector to detect one or more parameter values of an input voltage and input current of the DC voltage source and an output voltage and output current to the transformation circuit, wherein when the parameter values vary, the switch controller adjusts a length of time in which the voltage applied on the oscillation circuit is in one of the first direction and the second direction, such that the output voltage and/or output current returns to an initial value.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: July 3, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Jiale Dai, Yu Cao, Kezhi Wang
  • Patent number: 9966858
    Abstract: A DC-DC converting apparatus for obtaining a constant output voltage includes a DC voltage source that outputs a DC power voltage, a main circuit that converts an input voltage into an output voltage having a set value, an auxiliary circuit, coupled to the DC voltage source, that couples to the main circuit when the input voltage has a fluctuation exceeding a predetermined range so that an output voltage is maintained at the output voltage having the set value.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: May 8, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Jiale Dai, Yu Cao, Kezhi Wang
  • Patent number: 9819278
    Abstract: A DC/DC conversion apparatus includes a DC voltage source, an oscillation circuit, switch elements, a switch controller, and a transformation circuit. An inductor is provided in the oscillation circuit, a transformer is provided in the transformation circuit and a primary side of the transformer is connected in series with the oscillation circuit. Before a direction of a voltage applied to the oscillation circuit is switched from a first direction to a second direction, the switch controller disconnects electrical connection between the oscillation circuit and the DC voltage source and a first resonance loop is defined by a portion of the plurality of switch elements and the oscillation circuit. When a current flowing through the inductor is equal or substantially equal to an excitation current on the primary side of the transformer in the first resonance loop, at least one switch element in the first resonance loop is turned off to define a second resonance loop.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: November 14, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Jiale Dai, Yu Cao, Kezhi Wang
  • Patent number: 9667152
    Abstract: A power conversion system includes at least two power converters and a current sharing bus, each power converter including a switching circuit, a power conversion circuit configured to receive an input voltage via the switching circuit and to provide a local output current, an output sense circuit configured to detect the local output current and to generate a local output current sense signal, a current sharing terminal coupled to the local output current sense signal via a resistor and coupled to the current sharing bus; and a PWM controller configured to adjust a duty cycle of the switching circuit based at least in part on the local output current sense signal provided by the output sense circuit and an average current signal on the current sharing bus.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: May 30, 2017
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yu Cao, Kezhi Wang
  • Patent number: 9667161
    Abstract: A power converter includes a switching circuit, a power conversion circuit that receives an input voltage via the switching circuit and converts the input voltage into an output voltage, an input voltage sense circuit that detects the input voltage and generates an input voltage sense signal, and a PWM controller that adjusts a duty cycle of the switching circuit based at least in part on the input voltage sense signal. The power converter also includes an output sense circuit that detects the output voltage and generates an output voltage sense signal, wherein the PWM controller adjusts the duty cycle of the switching circuit based at least in part on the input voltage sense signal and the output voltage sense signal.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: May 30, 2017
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yu Cao, Kezhi Wang
  • Publication number: 20170093286
    Abstract: A DC/DC conversion apparatus includes a DC voltage source that outputs a DC power supply voltage, an oscillation circuit electrically connected to the DC voltage source, switch elements, a switch controller that connects or disconnects electrical connection between the DC voltage source and the oscillation circuit by switching turn-on and turn-off of the switch elements, and switches a direction of a voltage applied to the oscillation circuit between a first direction and a second direction, and a transformation circuit that outputs a current generated in the oscillation circuit and converts the current into a DC current.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 30, 2017
    Inventors: Jiale DAI, Yu CAO, Kezhi WANG
  • Publication number: 20170093293
    Abstract: A DC-DC converting apparatus for obtaining a constant output voltage includes a DC voltage source that outputs a DC power voltage, a main circuit that converts an input voltage into an output voltage having a set value, an auxiliary circuit, coupled to the DC voltage source, that couples to the main circuit when the input voltage has a fluctuation exceeding a predetermined range so that an output voltage is maintained at the output voltage having the set value.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 30, 2017
    Inventors: Jiale DAI, Yu CAO, Kezhi WANG
  • Publication number: 20170093287
    Abstract: A DC/DC conversion apparatus includes a DC voltage source, an oscillation circuit, switch elements, a switch controller, and a transformation circuit. An inductor is provided in the oscillation circuit, a transformer is provided in the transformation circuit and a primary side of the transformer is connected in series with the oscillation circuit. Before a direction of a voltage applied to the oscillation circuit is switched from a first direction to a second direction, the switch controller disconnects electrical connection between the oscillation circuit and the DC voltage source and a first resonance loop is defined by a portion of the plurality of switch elements and the oscillation circuit. When a current flowing through the inductor is equal or substantially equal to an excitation current on the primary side of the transformer in the first resonance loop, at least one switch element in the first resonance loop is turned off to define a second resonance loop.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 30, 2017
    Inventors: Jiale DAI, Yu CAO, Kezhi WANG
  • Publication number: 20170093294
    Abstract: A DC/DC conversion apparatus includes a DC voltage source, an oscillation circuit being electrically connected to the DC voltage source, a plurality of switch elements, a switch controller, which closes or opens electrical connection between the DC voltage source and the oscillation circuit by switching turn-on and turn-off of the plurality of switch elements, and switches a direction of a voltage applied on the oscillation circuit between a first direction and a second direction, a transformation circuit, a detector to detect one or more parameter values of an input voltage and input current of the DC voltage source and an output voltage and output current to the transformation circuit, wherein when the parameter values vary, the switch controller adjusts a length of time in which the voltage applied on the oscillation circuit is in one of the first direction and the second direction, such that the output voltage and/or output current returns to an initial value.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 30, 2017
    Inventors: Jiale DAI, Yu CAO, Kezhi WANG
  • Publication number: 20150365002
    Abstract: A power conversion system includes at least two power converters and a current sharing bus, each power converter including a switching circuit, a power conversion circuit configured to receive an input voltage via the switching circuit and to provide a local output current, an output sense circuit configured to detect the local output current and to generate a local output current sense signal, a current sharing terminal coupled to the local output current sense signal via a resistor and coupled to the current sharing bus; and a PWM controller configured to adjust a duty cycle of the switching circuit based at least in part on the local output current sense signal provided by the output sense circuit and an average current signal on the current sharing bus.
    Type: Application
    Filed: June 12, 2015
    Publication date: December 17, 2015
    Inventors: Yu CAO, Kezhi WANG
  • Publication number: 20140293658
    Abstract: A power converter includes a switching circuit, a power conversion circuit that receives an input voltage via the switching circuit and converts the input voltage into an output voltage, an input voltage sense circuit that detects the input voltage and generates an input voltage sense signal, and a PWM controller that adjusts a duty cycle of the switching circuit based at least in part on the input voltage sense signal. The power converter also includes an output sense circuit that detects the output voltage and generates an output voltage sense signal, wherein the PWM controller adjusts the duty cycle of the switching circuit based at least in part on the input voltage sense signal and the output voltage sense signal.
    Type: Application
    Filed: March 27, 2014
    Publication date: October 2, 2014
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Yu CAO, Kezhi WANG