Patents by Inventor Hideyuki Katsuta

Hideyuki Katsuta 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).

  • Differential amplifier, two-stage amplifier including the differential amplifier, and analog-to-digital converter including the differential amplifier
    Patent number: 6985030
    Abstract: A differential amplifier has an in-phase input terminal to which an input signal is applied through a first switching unit, an anti-phase input terminal to which a reference signal is applied through a second switching unit, and a third switching unit between the in-phase and anti-phase input terminals. The potential difference between the in-phase and anti-phase input terminals is differentially amplified by setting the first and second switching units to be on and the third switching unit to be off. Also, the in-phase and anti-phase input terminals are short-circuited to have a high impedance by setting the first and second switching units to be off and the third switching unit to be on.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: January 10, 2006
    Assignee: Sony Corporation
    Inventors: Yasuhide Shimizu, Hideyuki Katsuta, Yukitoshi Yamashita, Nobuhiko Yokoyama
  • Differential amplifier, two-stage amplifier including the differential amplifier, and analog-to-digital converter including the differential amplifier
    Publication number: 20040201417
    Abstract: A differential amplifier has an in-phase input terminal to which an input signal is applied through a first switching unit, an anti-phase input terminal to which a reference signal is applied through a second switching unit, and a third switching unit between the in-phase and anti-phase input terminals. The potential difference between the in-phase and anti-phase input terminals is differentially amplified by setting the first and second switching units to be on and the third switching unit to be off. Also, the in-phase and anti-phase input terminals are short-circuited to have a high impedance by setting the first and second switching units to be off and the third switching unit to be on.
    Type: Application
    Filed: April 6, 2004
    Publication date: October 14, 2004
    Applicant: Sony Corporation
    Inventors: Yasuhide Shimizu, Hideyuki Katsuta, Yukitoshi Yamashita, Nobuhiko Yokoyama