Patents by Inventor Robert T. Zeff

Robert T. Zeff 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).

  • Patent number: 5327101
    Abstract: A distortion limiter for limiting the amount of distortion of an inverting amplifier is disclosed. A comparator produces a pulse when a signal level at an inverting input of the inverting amplifier exceeds a reference voltage level. The pulse charges a capacitor. When the charge on the capacitor is sufficient to raise the gate voltage of a junction field-effect transistor (FET) above cutoff, the FET shunts the input signal to reduce its level. The distortion characteristics can be controlled by using a voltage divider to adjust the voltage across the FET. A bias voltage at the gate of the FET, keeps the FET turned off when the inverting amplifier is not clipping.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: July 5, 1994
    Assignee: Ford Motor Company
    Inventors: Gerald D. Neely, Alfonso Molinar, Andrew C. Krochmal, Robert T. Zeff