Patents by Inventor Douglas J. Greig

Douglas J. Greig 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).

  • Variable on-and off-time relaxation oscillator
    Patent number: 4038611
    Abstract: A relaxation oscillator comprising three cascaded operational voltage comparators is described. The on-time of the inventive circuit is established in accordance with a variable input element to the first operational comparator. The off-time is established by an RC network in the input circuit of the second operational comparator. The first and second operational comparators are interconnected so that the turning on or off of the second operational comparator affects the first operational comparator to cause it to also turn on or off.
    Type: Grant
    Filed: February 27, 1976
    Date of Patent: July 26, 1977
    Inventor: Douglas J. Greig