Patents by Inventor Brian Allan Zimmerman

Brian Allan Zimmerman 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: 5896300
    Abstract: A method, apparatus and computer program product performs a bounded parasitic extraction of typically all nets in an integrated circuit as part of a series of post-layout verification operations. According to one embodiment, a resistance-only extraction and/or a capacitance-only extraction is initially performed using computationally inexpensive electrical models of the nets. The resistance and capacitance extractions may be combined with models of the active devices to generate realistic worst case and best case delay models for each of the extracted nets. The delay models may be based on the resistance-only extraction and an upper bound on the parasitic capacitance of the net determined from the capacitance-only extraction, however, other models based solely on a resistance-only extraction may also be used, although they are typically less preferred.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: April 20, 1999
    Assignee: Avant| Corporation
    Inventors: Vivek Raghavan, Brian Allan Zimmerman