Patents by Inventor Eiji Hyodo

Eiji Hyodo 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).

  • Transimpedance amplifier
    Patent number: 7868701
    Abstract: A gain switching determination circuit (250) compares/determines a comparative input voltage (Vc) from an inter-stage buffer (230) with a first hysteresis characteristic, and outputs a gain switching signal (SEL) based on the comparison/determination result to first and second transimpedance amplifier core circuits (210, 220), thereby switching the gains of the core circuits. This obviates holding a comparison input voltage with long response time in a level holding circuit for gain switching determination, which allows instantaneous gain switching determination and instantaneous response corresponding to burst data.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: January 11, 2011
    Assignees: Nippon Telephone and Telegraph Corporation, NTT Electronics Corporation
    Inventors: Makoto Nakamura, Yohtaro Umeda, Jun Endou, Yuji Akatsu, Yuuki Imai, Masatoshi Tobayashi, Yoshikazu Urabe, Hatsushi Iizuka, Eiji Hyodo
  • Transimpedance Amplifier
    Publication number: 20080309407
    Abstract: A gain switching determination circuit (250) compares/determines a comparative input voltage (Vc) from an inter-stage buffer (230) with a first hysteresis characteristic, and outputs a gain switching signal (SEL) based on the comparison/determination result to first and second transimpedance amplifier core circuits (210, 220), thereby switching the gains of the core circuits. This obviates holding a comparison input voltage with long response time in a level holding circuit for gain switching determination, which allows instantaneous gain switching determination and instantaneous response corresponding to burst data.
    Type: Application
    Filed: August 3, 2005
    Publication date: December 18, 2008
    Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NITT ELECTRONICS CORPORATION
    Inventors: Makoto Nakamura, Yohtaro Umeda, Jun Endou, Yuji Akatsu, Yuuki Imsi, Masatoshi Tobayashi, Yoshikazu Urabe, Hatsushi Iizuka, Eiji Hyodo