Patents by Inventor Vincentius T. M. Frequin

Vincentius T. M. Frequin 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).

  • Automatic gain control circuit having a control loop including a current threshold circuit
    Patent number: 4812908
    Abstract: An automatic gain control circuit having different control loops which must each be controlled in a different control current range by one and the same control current, includes a current threshold circuit having an input to which a threshold current source (7) and the emitters of a complementary transistor pair are connected so that the collector current of each transistor can control a control loop.
    Type: Grant
    Filed: April 7, 1988
    Date of Patent: March 14, 1989
    Assignee: U.S. Philips Corporation
    Inventor: Vincentius T. M. Frequin