Patents by Inventor Steven P. Parfitt

Steven P. Parfitt 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).

  • Analog to digital converter circuit
    Patent number: 4618848
    Abstract: A circuit for converting analog to digital data uses a CMOS multiplexer, an analog to digital converter and an operational amplifier buffer controlled by a single chip microprocessor. An FET shunt circuit is connected to the input of the operational amplifier in order to pull the input to ground during a conversion cycle of the converter and the resulting data is read and used to adjust the data from subsequent data conversions to correct for offsets of the operational amplifier and the converter.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: October 21, 1986
    Assignee: Texas Instruments Incorporated
    Inventor: Steven P. Parfitt