Patents by Inventor Bijan Salimi

Bijan Salimi 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: 5883818
    Abstract: Modeling of propagation delay and output transition time by use of fitting functions comprised of standard Taylor series and inverse powers is disclosed. These components are used as a basis for generating an equation that predicts circuit performance over a wide range of input transition and output capacitive loads. The present invention includes a computer implemented method for adding functions to the fitting functions or removing functions from the fitting functions until an acceptable error limit has been reached.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: March 16, 1999
    Assignee: International Business Machines Corporation
    Inventors: Bijan Salimi, David Bruce White
  • Patent number: 5751595
    Abstract: A method for verifying that an integrated circuit design tool kit has not been modified in an unauthorized manner is accomplished by providing a verification procedure that, when an executable subrule of the tool kit has been selected to be part of the rule system, the executable subrule reads a table of time stamps. This table of time stamps and a key are provided, as representative data, to an authentication subrule by the executable subrule. The executable subrule and the authentication subrule perform an authentication check algorithm upon the representative data to produce remotely and locally checked data respectively. The executable subrule then provides the locally checked data to the authentication subrule which compares the locally checked data with the remotely checked data. When a match occurs between the data, the authentication subrule indicates that the executable subrule has not been modified in an unauthorized manner.
    Type: Grant
    Filed: March 14, 1996
    Date of Patent: May 12, 1998
    Assignee: International Business Machines Corporation
    Inventors: Harry John Beatty, III, Peter Claude Elmendorf, Jeannie Harrigan Panner, Bijan Salimi, Lansing Dunn Pickup
  • Patent number: 5293083
    Abstract: An improved differential cascode current push-pull driver is provided by controlling the up level by clamping the collector node with respect to output signal reference VR to less than VCC. The collector resistors are made smaller so there is smaller signal swing and faster operation.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: March 8, 1994
    Assignee: International Business Machines Corporation
    Inventors: Haluk O. Askin, David T. Hui, Bijan Salimi, Charles B. Winn
  • Patent number: 5132562
    Abstract: A bipolar push-pull driver in which the input transistor is biased so that it does not saturate and the base of its associated output transistor is pulled down to shut off compeletely by a transistor switch controlled by the complimentary output of the other input transistor.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: July 21, 1992
    Assignee: International Business Machines Corporation
    Inventors: Francis Chan, George J. English, Bijan Salimi, David R. Weitzel