Patents by Inventor James Brian Wieser

James Brian Wieser 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: 5818377
    Abstract: A bipolar, element averaging, digital to analog signal converter including a delta-sigma digital to analog converter (".increment..SIGMA. DAC") with dual sequence controllers for controlling the switching sequences of the array of sampling capacitors used to sample a fixed reference voltage in the sample and hold amplifier. The sequence controllers receive the input digital signal and a sign bit which indicates whether the numeric value of the digital signal is positive or negative with respect to the mean value of its total dynamic range. Based upon the sign bit and the value of the digital signal, the sequence controllers generate two sets of switching sequence control signals: "positive" and "negative." Those digital signals whose numeric values are positive and negative with respect to the mean value are considered to be "positive" and "negative" signals, respectively, with corresponding positive and negative analog signals generated accordingly.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: October 6, 1998
    Assignee: National Semiconductor Corporation
    Inventor: James Brian Wieser