Patents by Inventor Yoshihisa Nakatoh

Yoshihisa Nakatoh 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).

  • Amplifier circuit more immune to fluctuation of reference voltage
    Patent number: 4972159
    Abstract: An amplifier circuit having a differential amplifier, provided in a semiconductor integrated circuit is disclosed. The differential amplifier has one input connected to a reference voltage generating circuit. The voltage outputted from the reference voltage generating circuit includes a voltage fluctuation depending on the fluctuation in power-supply voltage Vcc. However, a fluctuation absorbing circuit comprising resistors 51 and 52, diodes 53 and 54, and a capacitor 55 absorbs the voltage fluctuation thereof. As a result, the change in offset voltage of the differential amplifier is prevented, resulting in an improvement of a power-supply rejection ratio.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: November 20, 1990
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshihisa Nakatoh, Kazuharu Date, Tooru Yamamoto, Shigeki Imai