Patents by Inventor Toshihiro Shougaki

Toshihiro Shougaki 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).

  • High-frequency switch circuit, semiconductor device and communication terminal apparatus
    Publication number: 20070085592
    Abstract: In a high-frequency switch circuit having a booster circuit and a voltage switch circuit for ON/OFF control of the booster circuit, the voltage switch circuit has a means for gradually dropping the gate input voltage and the drain/source input voltage of a series of FETs over a voltage drop time of 10 ?sec or more at the time of switching from a boosted voltage to a non-boosted voltage.
    Type: Application
    Filed: September 11, 2006
    Publication date: April 19, 2007
    Inventors: Eiji Yasuda, Tadayoshi Nakatsuka, Toshihiro Shougaki, Kenichi Hidaka, Taketo Kunihisa