Patents by Inventor Robert H. Wolff

Robert H. Wolff 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).

  • Delay circuit having one of a plurality of delay lines which may be selected to provide an operation of a ring oscillator
    Patent number: 5087842
    Abstract: The delay period of a delay circuit is maintained, over time, near to a desired delay, by generating information representative of the present delay period of the delay circuit, and altering the delay period, from time to time during operation, based on the present delay information and the desired delay. The present delay is measured by a reference circuit having a delay characteristic corresponding to the delay characteristic of the delay circuit. Both the reference and multiple delay circuits are formed with the same configuration on a single integrated circuit.
    Type: Grant
    Filed: April 19, 1989
    Date of Patent: February 11, 1992
    Assignee: Digital Equipment Corporation
    Inventors: James A. Pulsipher, Robert H. Wolff, Steven G. Worthington