Patents by Inventor William D. Mack

William D. Mack 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: 5115206
    Abstract: The tail current of a differential transistor pair (12 and 14) is controlled by a feed-back means (40) that couples the pair's tail node (16) to the control input of each transistor for controlling a biasing current through each transistor. The control input of each transistor further receives an input signal in addition to an output signal of the feed-back means. As a result, the circuit has a stable and accurate tail current, and in addition is suitable for a low-voltage supply or for high-current operation.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: May 19, 1992
    Assignee: North American Philips Corp., Signetics Division
    Inventors: William D. Mack, Daniel J. Linebarger
  • Patent number: 4736271
    Abstract: A protection device (14) for an integrated circuit (12) created on a semiconductor body (24 and 26) utilizes one or more semiconductor diodes (D.sub.L and/or D.sub.H) that have subsurface PN junctions (46 and/or 56) for preventing high-magnitude voltages, such as those generated by electrostatic discharge, from damaging sensitive electronic elements of a protected circuit component (16) formed from part of the body. The device is fabricated by an epitaxial layer/double buried region process.
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: April 5, 1988
    Assignee: Signetics Corporation
    Inventors: William D. Mack, Richard H. Lane