Patents by Inventor Yoshiro Yoshino

Yoshiro Yoshino 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 having gain control
    Patent number: 4996501
    Abstract: An amplifier circuit comprises a variable gain amplifier for receiving an input signal which is to be amplified by the amplifier circuit with a variable gain. The variable gain is controlled by a control signal. The amplifier circuit also includes a constant gain amplifier for amplifying a signal outputted from the variable gain amplifier with a constant gain, and a gain control circuit responsive to a signal outputted from the constant gain amplifier so as to supply the control signal to the variable gain amplifier. The signal from the constant gain amplifier is outputted as an output signal of the amplifier circuit, and the gain control circuit generates the control signal during a time period in which a level of the output signal of the constant gain amplifier is higher than a reference level which is a predetermined value lower than a peak value of the output signal of the constant gain amplifier.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: February 26, 1991
    Assignees: Fujitsu Limited, Fujitsu VLSI Limited
    Inventors: Yoshiaki Sano, Toshio Hanazawa, Yoshiro Yoshino