Patents by Inventor Kohhei Kudoh

Kohhei Kudoh 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 device, 2-stage amplifier device, and analog/digital converter device
    Patent number: 7042384
    Abstract: A differential amplifier device is disclosed wherein the device comprises a differential amplifier circuit, a load circuit connected to the differential amplifier circuit; and a change-over switch connected to the load circuit for changing a gain of the differential amplifier circuit by switching between a full load where a whole of the load circuit is set to be the load of the differential amplifier circuit and a partial load where a part of the load circuit is set to be the load of the differential amplifier circuit, wherein the load circuit is configured to amplify an input signal and an output signal of the differential amplifier circuit in the full load.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: May 9, 2006
    Assignee: Sony Corporation
    Inventors: Yasuhide Shimizu, Shigemitsu Murayama, Kohhei Kudoh
  • Differential amplifier device, 2-stage amplifier device, and analog/digital converter device
    Publication number: 20050248479
    Abstract: A differential amplifier device is disclosed wherein the device comprises a differential amplifier circuit, a load circuit connected to the differential amplifier circuit; and a change-over switch connected to the load circuit for changing a gain of the differential amplifier circuit by switching between a full load where a whole of the load circuit is set to be the load of the differential amplifier circuit and a partial load where a part of the load circuit is set to be the load of the differential amplifier circuit, wherein the load circuit is configured to amplify an input signal and an output signal of the differential amplifier circuit in the full load.
    Type: Application
    Filed: April 15, 2005
    Publication date: November 10, 2005
    Inventors: Yasuhide Shimizu, Shigemitsu Murayama, Kohhei Kudoh