Patents by Inventor Ikuya Oono

Ikuya Oono 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).

  • Signal processing semiconductor integrated circuit device and wireless communication system
    Patent number: 7085587
    Abstract: Disclosed herein is a direct conversion type signal processing semiconductor integrated circuit device capable of suppressing a DC voltage variation in the output of a variable gain amplifier upon the transition to a reception mode, reproducing stable receiving characteristics and improving receiving sensitivity. In the signal processing semiconductor integrated circuit device, voltage reference circuits for generating reference voltages for controlling or restricting currents for current sources for supplying operating currents for amplifiers constituting a reception-system circuit are boosted upon the transition from an idle mode or the like to the reception mode to allow the currents to flow into the constant-current sources of the amplifiers after the stabilization of the generated reference voltages.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: August 1, 2006
    Assignee: Renesas Technology Corp.
    Inventors: Ikuya Oono, Toshiki Matsui, Hirotaka Oosawa
  • Signal processing semiconductor integrated circuit device and wireless communication system
    Publication number: 20020094792
    Abstract: Disclosed herein is a direct conversion type signal processing semiconductor integrated circuit device capable of suppressing a DC voltage variation in the output of a variable gain amplifier upon the transition to a reception mode, reproducing stable receiving characteristics and improving receiving sensitivity. In the signal processing semiconductor integrated circuit device, voltage reference circuits for generating reference voltages for controlling or restricting currents for current sources for supplying operating currents for amplifiers constituting a reception-system circuit are boosted upon the transition from an idle mode or the like to the reception mode to allow the currents to flow into the constant-current sources of the amplifiers after the stabilization of the generated reference voltages.
    Type: Application
    Filed: January 3, 2002
    Publication date: July 18, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Ikuya Oono, Toshiki Matsui, Hirotaka Oosawa