Patents by Inventor David John Warner

David John Warner 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).

  • Charge pump for phase locked loop including main and auxiliary pump circuits
    Patent number: 6043716
    Abstract: A charge pump includes a main pump circuit having a main first and second switching transistors and an auxiliary pump circuit. The charge pump is configured to provide a variable bias to at least the first switching transistor in response to operation of the auxiliary pump circuit. The auxiliary pump circuit can include auxiliary first and second switching transistors corresponding to the first and second switching transistors of the main pump circuit. The auxiliary first and second switching transistors control a charging level for auxiliary charge storage. A bias transistor of a controllable current source for the first switching transistor of the auxiliary pump circuit is responsive to a charging level of the auxiliary charge storage to provide a self-regulating bias to the first switching transistor of the auxiliary pump circuit.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: March 28, 2000
    Assignee: LSI Logic Corporation
    Inventor: David John Warner