Patents by Inventor Toshihiko Matsumura

Toshihiko Matsumura 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).

  • Offset compensating circuit
    Patent number: 4377759
    Abstract: An offset compensating circuit is disclosed. The offset compensating circuit is inserted in a negative feedback loop of a circuit to be compensated and includes an integration circuit. The integration circuit includes a switching means mechanism and a switched capacitor type integrator. Said switching means mechanism produces either a positive reference voltage or a negative reference voltage in accordance with the polarity of the output signal of the circuit to be compensated. The positive or negative reference voltage is applied to the switched capacitor type integrator, which produces a compensating voltage signal to be combined with the input signal of the circuit to be compensated.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: March 22, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Michinobu Ohhata, Toshihiko Matsumura, Masao Yamasawa, Takafumi Chujo, Masayuki Takahashi