Patents by Inventor Yorinao Kurokawa

Yorinao Kurokawa 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).

  • Amplifier apparatus, signal processing apparatus, radio communication apparatus, connector mounting structure, and coaxial connector
    Patent number: 9083290
    Abstract: There is provided an amplifier apparatus and a signal processing apparatus that reduce a delay or distortion of a power supply voltage used for drain modulation. An amplifier apparatus is an amplifier apparatus that performs drain modulation, and includes a printed circuit board having a first surface and a second surface; an amplifier circuit disposed on the first surface; and a modulation power supply circuit that supplies a variable power supply voltage for performing drain modulation, to the amplifier circuit The modulation power supply circuit has an output portion that outputs the power supply voltage. The amplifier circuit has an input portion to which the power supply voltage is supplied. The output portion is located on the side of the second principal surface of the printed circuit board and is connected to the input portion through a conductor penetrating through the printed circuit board.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: July 14, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yorinao Kurokawa, Tatsuhiro Shimura
  • AMPLIFIER APPARATUS, SIGNAL PROCESSING APPARATUS, RADIO COMMUNICATION APPARATUS, CONNECTOR MOUNTING STRUCTURE, AND COAXIAL CONNECTOR
    Publication number: 20120294201
    Abstract: There is provided an amplifier apparatus and a signal processing apparatus that reduce a delay or distortion of a power supply voltage used for drain modulation. An amplifier apparatus is an amplifier apparatus that performs drain modulation, and includes a printed circuit board having a first surface and a second surface; an amplifier circuit disposed on the first surface; and a modulation power supply circuit that supplies a variable power supply voltage for performing drain modulation, to the amplifier circuit. The modulation power supply circuit has an output portion that outputs the power supply voltage. The amplifier circuit has an input portion to which the power supply voltage is supplied. The output portion is located on the side of the second principal surface of the printed circuit board and is connected to the input portion through a conductor penetrating through the printed circuit board.
    Type: Application
    Filed: February 22, 2011
    Publication date: November 22, 2012
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Yorinao Kurokawa, Tatsuhiro Shimura