Patents by Inventor Kazushige Koshika

Kazushige Koshika 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
    Patent number: 4626795
    Abstract: First and second current mirror circuits are provided to the first and second amplifying transistors, respectively. The output current paths of current mirror circuits constitute output current terminals, respectively, and the reference input current paths are connected to the collectors of the first and second transistors, respectively. The first current mirror circuit comprises third and fourth transistors and the second current mirror circuit comprises fifth and sixth transistors. The base of the third transistor of the first current mirror circuit and the base of the fifth transistor of the second current mirror circuit are connected to first and second reference potentials, respectively. The base of the fourth transistor of the first circuit and the base of the sixth transistor of the second circuit are connected to the collectors of the first and second transistors, respectively.
    Type: Grant
    Filed: September 6, 1985
    Date of Patent: December 2, 1986
    Assignees: Kabushiki Kaisha Toshiba, Tosbac Computer System Co., Ltd.
    Inventors: Tatsuo Tanaka, Nana Shigematsu, Kazushige Koshika