Patents by Inventor Thomas D. Parkinson

Thomas D. Parkinson 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).

  • CMOS input with temperature and V.sub.CC compensated threshold
    Patent number: 5532617
    Abstract: A CMOS inverter circuit is provided which includes a compensation circuit which modifies the inverter threshold depending on changes in supply voltage and/or temperature. The inverter includes a standard CMOS inverter, current boosting circuitry and a reference signal generator. The input of the inverter is coupled to the current boosting circuitry. A reference signal is also coupled to the current boosting circuitry in order to change the effective PMOS to NMOS ratio of the inverter to control the input threshold over a range of supply voltages and/or temperatures. The reference signal generator generates a reference signal which is dependent upon changes in supply voltage and which can be controlled over a range of temperatures.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: July 2, 1996
    Assignee: Philips Electronics North America Corporation
    Inventors: Thomas D. Parkinson, Brian C. Martin