Patents by Inventor Yasuhide Katagase

Yasuhide Katagase 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).

  • Constant voltage source circuit
    Patent number: 4983905
    Abstract: A constant voltage source circuit which is provided with an output transistor (Q.sub.1) for outputting a predetermined output voltage (V.sub.0) in accordance with an input voltage (V.sub.IN) and a differential amplifier (A), and is further characterized in that the circuit further comprises a reference voltage control means which monitors variations of the input voltage (V.sub.IN) and outputs a predetermined constant voltage to the differential amplifier (A) as a reference voltage when the input voltage (V.sub.IN) is higher than, a predetermined voltage level, and a voltage varied in accordance with the variation of the input voltage (V.sub.IN) is output therefrom to the differential amplifier (A) as a reference voltage when the input voltage (V.sub.IN) falls below a predetermined voltage level.
    Type: Grant
    Filed: July 5, 1989
    Date of Patent: January 8, 1991
    Assignees: Fujitsu Limited, Fujitsu VLSI Limited, Fujitsu Ten Limited
    Inventors: Yoshiaki Sano, Toshio Hanazawa, Yasuhide Katagase, Katsuyuki Yasukouchi, Takashi Matsumoto, Susumu Fujihara