Patents Represented by Attorney J. J. McArdle
  • Patent number: 5247636
    Abstract: A clock circuit (12) normally couples clock pulses to a microprocessor (11), which is capable of accessing memory devices (13,14) having different access times. Access of a "slow" memory device 14 is detected by the clock circuit, and in response thereto, one or more clock pulses are not coupled to the microprocessor. This suspends operation of the microprocessor for a suitable amount of time so that the microprocessor reads valid data from the slow memory device. The number of clock pulses blocked from reaching the microprocessor can be set in a delay circuit (28) in the clock circuit.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: September 21, 1993
    Assignee: International Business Machines Corporation
    Inventors: Jeffrey A. Minnick, Warren J. Spina
  • Patent number: 5061902
    Abstract: The provision of shoot-through protection with means for producing a low impedance path from the gate of each power transistor to its source conduction electrode if the gate to source voltage at the other transistor is greater than a reference value. This additional circuitry permits the use of a desired driver circuit without modification, while preventing shoot-through whether from the driver signals or from high output voltage changes.
    Type: Grant
    Filed: October 3, 1990
    Date of Patent: October 29, 1991
    Assignee: International Business Machines Corp.
    Inventor: Gary D. Carpenter