Patents by Inventor Shujaat Nadeem

Shujaat Nadeem 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: 5539342
    Abstract: An electrical current-switching driver circuit is provided for switching current through an inductive memory write head on a memory storage device. The driver circuit provides means for reducing distortion in the output current waveform and for minimizing occurrences of breakdown in the switching transistors in the circuit. The circuit uses AC coupling circuitry and small DC holding currents to linearize the current transition during switching transients, thereby eliminating discontinuities which would otherwise appear in the head current output waveform, midway through the switching transients.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: July 23, 1996
    Assignee: International Business Machines Corporation
    Inventors: John E. Gersbach, Shujaat Nadeem
  • Patent number: 5220286
    Abstract: A single to fully differential converter for fully differential switched capacitor circuits is provided which can be incorporated into a switched capacitor integrator architecture performing both conversion and integrating functions without affecting the performance of the fully differential integrator.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: June 15, 1993
    Assignee: International Business Machines Corporation
    Inventor: Shujaat Nadeem