Patents by Inventor Rintaro Sukegawa

Rintaro Sukegawa 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).

  • Patent number: 8686792
    Abstract: A supply voltage controller 11 includes a simplified envelope creating unit 111 that calculates an envelope of an input audio signal according to an input audio signal from an external device, creates a supply voltage control signal so that a waveform of the supply voltage control signal follows a waveform of the envelope, and outputs the supply voltage control signal to a voltage variable power supply 12 a constant time before the input audio signal is amplified by the amplifier 14. Accordingly, an amplifying device can be provided which can reduce the distortion of the output signal not depending on a change in the slew rate of the voltage variable power supply 12 and suppress the deterioration of power efficiency.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: April 1, 2014
    Assignee: Panasonic Corporation
    Inventors: Rintaro Sukegawa, Seigo Ozaki
  • Publication number: 20130034250
    Abstract: Disclosed is an amplifier with which output signal distortion can be reduced, and deterioration in power efficiency can be reduced. The amplifier is provided with a power supply voltage control unit (11) that generates a voltage control signal from a simple envelope of an input signal in order to control a variable voltage power supply (12). The power supply voltage control unit (11) is composed of: a slope comparison processing unit (112) that calculates the slope required to generate a voltage control signal; a total delay time calculation unit (113) that calculates the sum of the delay times between the dots produced by the slope comparison process; and a voltage control signal generation unit (114) that generates a voltage control signal in such a manner that the waveform formed by the voltage control signal, which controls the variable voltage power supply (12), constitutes a waveform that reflects the selected slope or the sum of the slew rate and delay time.
    Type: Application
    Filed: May 13, 2011
    Publication date: February 7, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Seigo Ozaki, Rintaro Sukegawa
  • Publication number: 20120262232
    Abstract: A supply voltage controller 11 includes a simplified envelope creating unit 111 that calculates an envelope of an input audio signal according to an input audio signal from an external device, creates a supply voltage control signal so that a waveform of the supply voltage control signal follows a waveform of the envelope, and outputs the supply voltage control signal to a voltage variable power supply 12 a constant time before the input audio signal is amplified by the amplifier 14. Accordingly, an amplifying device can be provided which can reduce the distortion of the output signal not depending on a change in the slew rate of the voltage variable power supply 12 and suppress the deterioration of power efficiency.
    Type: Application
    Filed: January 5, 2011
    Publication date: October 18, 2012
    Applicant: Panasonic Corporation
    Inventors: Rintaro Sukegawa, Seigo Ozaki