Patents by Inventor Satoshi Kayama

Satoshi Kayama 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).

  • Semiconductor device
    Patent number: 6624509
    Abstract: In a differential low-noise amplifier built in a semiconductor integrated circuit for a dual-band wireless transceiver, impedance components of wire bonding and package that occur in emitters are reduced and a gain is improved. Ground pins of amplifiers of the differential amplifier forming a pair are arranged adjacent to each other. Input pins and ground pins of the same amplifier are arranged adjacent to each other. Signals of the adjacent pins are allowed to have inverse phases, and trans-coupling between the pins is utilized so as to reduce impedance of the transistor emitters.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: September 23, 2003
    Assignees: Hitachi, Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Kumiko Takikawa, Satoshi Tanaka, Satoshi Kayama, Yuichi Saito, Norio Hayashi
  • Semiconductor device
    Publication number: 20020053729
    Abstract: In a differential low-noise amplifier built in a semiconductor integrated circuit for a dual-band wireless transceiver, impedance components of wire bonding and package that occur in emitters are reduced and a gain is improved. Ground pins of amplifiers of the differential amplifier forming a pair are arranged adjacent to each other. Input pins and ground pins of the same amplifier are arranged adjacent to each other. Signals of the adjacent pins are allowed to have inverse phases, and trans-coupling between the pins is utilized so as to reduce impedance of the transistor emitters.
    Type: Application
    Filed: July 25, 2001
    Publication date: May 9, 2002
    Inventors: Kumiko Takikawa, Satoshi Tanaka, Satoshi Kayama, Yuichi Saito, Norio Hayashi