Patents by Inventor Masachika Ohno

Masachika Ohno 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 integrated circuit device
    Patent number: 7715869
    Abstract: The semiconductor integrated circuit (RF IC) for a mobile telephone capable of transmitting/receiving the signals of plural bands reduces the DC offsets of the amplifiers located in the following stages of the mixers that demodulate or down-convert the reception signals. The invention scrambles the signal lines to transmit the outputs of the plural mixers that demodulate or down-convert the reception signals of different bands, so as to avoid the adjacent signal lines from making the same combination from the starting ends to the finishing ends.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: May 11, 2010
    Assignees: Hitachi, Ltd., Akita Electronics Systems Co., Ltd.
    Inventors: Satoru Takahashi, Ikuya Ohno, Norio Hayashi, Masachika Ohno, Kazuhiro Tagawa
  • Semiconductor integrated circuit device
    Publication number: 20040051122
    Abstract: The semiconductor integrated circuit (RF IC) for a mobile telephone capable of transmitting/receiving the signals of plural bands reduces the DC offsets of the amplifiers located in the following stages of the mixers that demodulate or down-convert the reception signals. The invention scrambles the signal lines to transmit the outputs of the plural mixers that demodulate or down-convert the reception signals of different bands, so as to avoid the adjacent signal lines from making the same combination from the starting ends to the finishing ends.
    Type: Application
    Filed: September 4, 2003
    Publication date: March 18, 2004
    Inventors: Satoru Takahashi, Ikuya Ohno, Norio Hayashi, Masachika Ohno, Kazuhiro Tagawa