Patents by Inventor Shyuji Yamamoto

Shyuji Yamamoto 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).

  • Chopper type voltage comparator and analog/digital converter using the same
    Patent number: 6677880
    Abstract: There is provided a chopper type voltage comparator for comparing a sampled input voltage with a ramp voltage that is changed with a time, in which a bias voltage is changed according to the ramp voltage, and then the bias voltage comes up to a predetermined voltage value that is able to bring the chopper type voltage comparator into a comparing operation state when the ramp voltage becomes substantially equal to the input voltage. Accordingly, a voltage comparator whose consumption power can be suppressed rather than the prior art and an analog/digital-converter using the same can be provided.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: January 13, 2004
    Assignee: Innotech Corporation
    Inventor: Shyuji Yamamoto
  • Chopper type voltage comparator and analog/digital converter using the same
    Publication number: 20020196173
    Abstract: There is provided a chopper type voltage comparator for comparing a sampled input voltage with a ramp voltage that is changed with a time, in which a bias voltage is changed according to the ramp voltage, and then the bias voltage comes up to a predetermined voltage value that is able to bring the chopper type voltage comparator into a comparing operation state when the ramp voltage becomes substantially equal to the input voltage. Accordingly, a voltage comparator whose consumption power can be suppressed rather than the prior art and an analog/digital-converter using the same can be provided.
    Type: Application
    Filed: May 29, 2002
    Publication date: December 26, 2002
    Inventor: Shyuji Yamamoto