Patents by Inventor Joseph A. Petrosky, Jr.

Joseph A. Petrosky, Jr. 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).

  • Word group redundancy scheme
    Patent number: 4462091
    Abstract: A word redundancy scheme for a high speed RAM where the bit output stage uses on-chip logic. An extra emitter on each of the decoders is utilized including redundant word group decoders. A compare circuit has an output to each of the extra emitters and when the address of a bad bit arrives at the compare circuit it de-selects each of the non-redundant decoders at that address and selects the redundant decoders via the extra emitters. Hence, the redundant decoders replace the decoders of the bad bit position.
    Type: Grant
    Filed: February 26, 1982
    Date of Patent: July 24, 1984
    Assignee: International Business Machines Corporation
    Inventors: Ronald W. Knepper, Peter J. Ludlow, Joseph A. Petrosky, Jr.
  • Low power complementary field effect transistor (CFET) logic circuit
    Patent number: 4053792
    Abstract: Disclosed is a logic circuit implemented in complementary field effect transistor (CFET) technology for improving the transient response of CFET circuits and providing a true DOT-OR or DOT-AND logic function. The pull-up circuit includes at least one active device and is placed either in parallel with or replaces the conventional load impedance between a source of potential and the output node.
    Type: Grant
    Filed: June 27, 1974
    Date of Patent: October 11, 1977
    Assignee: International Business Machines Corporation
    Inventors: Anthony T. Cannistra, Joseph A. Petrosky, Jr.
  • High common mode rejection differential amplifier utilizing enhancement depletion field effect transistors
    Patent number: 3970950
    Abstract: A dual channel high gain differential amplifier utilizing enhancement depletion MOS field effect transistors which exhibits high common mode rejection and fast switching characteristics.
    Type: Grant
    Filed: March 21, 1975
    Date of Patent: July 20, 1976
    Assignee: International Business Machines Corporation
    Inventors: Leo B. Freeman, Jr., Robert J. Incerto, Joseph A. Petrosky, Jr.