Patents by Inventor Neil G. Hedtke

Neil G. Hedtke 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).

  • Closed loop linearizer for ramp modulated VCO
    Patent number: 5379001
    Abstract: A closed loop linearizer method and apparatus for providing a linear ramp modulation for a voltage controlled oscillator (VCO). A counter is connected to the VCO for calculating two frequency values of the oscillator at one or more time points during a ramp interval. The difference of the two frequency values is then compared with that of a predetermined ideal difference frequency value. A resulting correction value is then generated and used to adjust digital control values upward and downward, thereby causing the VCO to produce a linear modulation ramp output slope over time.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: January 3, 1995
    Assignee: Alliant Techsystems Inc.
    Inventor: Neil G. Hedtke