Patents by Inventor Gerard Ashok

Gerard Ashok 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).

  • Overload protection circuit using a no-trim circuit for computer power supplies
    Patent number: 5815351
    Abstract: In a computer, an overload protection circuit for protecting the computer's power supply from overload over a wide ambient temperature range. The overload protection circuit, which compares two voltage signals in order to shut off the computer power supply when certain limits are exceeded, is implemented without any pots or other trim circuits. Instead, a resistive temperature device is utilized to counter the effects of increasing ambient temperature on the overload protection circuit.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: September 29, 1998
    Assignee: Dell Computer Corporation
    Inventors: Gerard Ashok, Fred M. Henegar
  • External line harmonics reduction module for power supplies
    Patent number: 5742103
    Abstract: A line harmonics reduction module is enclosed in a chassis having a receptacle and a plug on opposite faces, for connection externally to a computer system unit or similar electronic equipment between the AC line power cord and the AC power receptacle contained in the computer system unit. The module may contain passive components such as an inductor, or may contain active circuitry designed to reduce the amplitudes of current components at harmonics of the line frequency by forcing the current waveform to be more nearly sinusoidal.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: April 21, 1998
    Assignee: Dell U.S.A., L.P.
    Inventor: Gerard Ashok