Patents by Inventor David J. Simons

David J. Simons 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).

  • Digital to analog resolver converter
    Patent number: 4072940
    Abstract: A digital to analog resolver converter uses a digital to analog converter to convert a part of the digital input to a corresponding analog angle value. This analog angle value is applied to sine and cosine function generators which use the equations of chords to approximate the value of the sine and cosine functions in one octant. Bits of the digital input are used to select slope values from the chord equations for approximating the sine and cosine of the analog angle value. The digital to analog resolver converter uses the minimum number of precision resistors to generate the sine and cosine slope and intercept values for the equations of a given number of approximating chords.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: February 7, 1978
    Assignee: The Singer Company
    Inventors: David J. Simon, Edward C. Costello