Patents by Inventor Ryougo Yanagisawa

Ryougo Yanagisawa 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).

  • System for controlling the clock to each of a plurality of protocol circuits of an interface control integrated circuit based on the type of data to be transmitted
    Patent number: 7213161
    Abstract: In an interface control semiconductor integrated circuit including a plurality of protocol circuits for processing a protocol such as AV- or PC-oriented protocols engaged in an IEEE 1394 standard-compliant data transmission, power consumption is reduced. To achieve this, the interface control semiconductor integrated circuit including the protocol circuits is provided with a plurality of switches associated with the respective protocol circuits and each of the switches performs a switching between supply and shut-off of a clock. A clock is supplied to one of the protocol circuits which should be used whereas clock to unused protocol circuits are shut-off, by controlling each of the switches.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: May 1, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takayuki Matsui, Ryougo Yanagisawa, Kiyotaka Iwamoto
  • Data transmission system, interface control semiconductor integrated circuit and method for controlling protocol circuit
    Publication number: 20040088599
    Abstract: In an interface control semiconductor integrated circuit including a plurality of protocol circuits for processing a protocol such as AV- or PC-oriented protocols engaged in an IEEE 1394 standard-compliant data transmission, power consumption is reduced. To achieve this, the interface control semiconductor integrated circuit including the protocol circuits is provided with a plurality of switches associated with the respective protocol circuits and each of the switches performs a switching between supply and shut-off of a clock. A clock is supplied to one of the protocol circuits which should be used whereas clock to unused protocol circuits are shut-off, by controlling each of the switches.
    Type: Application
    Filed: October 27, 2003
    Publication date: May 6, 2004
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO.
    Inventors: Takayuki Matsui, Ryougo Yanagisawa, Kiyotaka Iwamoto