Title: Goniometer circuit for VOR system

Abstract: The present invention relates to an improved goniometer circuit having extremely low modulation harmonic distortion characteristics, which is particularly suitable for use in a VOR navigation system. In the disclosed circuit, modulation harmonic distortion is greatly reduced by the use of a phase lock loop operating at small signal levels prior to the power amplification stage of the system. The phase lock loop employs a voltage controlled oscillator to completely eliminate harmonic distortion so that the final output of the system is virtually modulation free.

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Inventors: Schwab, Carl E. (Huntington Station, NY, US)
Hutter, Joseph A. (Rocky Point, NY, US)

Application Number: 955321
Filing Date: 1978-10-27
Publication_date: 1980-01-29
Assignee: General Signal Corporation (Woodbury, NY)
Primary Class(es): 342/386 342/404
Other Classes:
US Patent Ref:

3553590	Jan, 1971	Hofgen	343/102.
3979751	Sep, 1976	van den Berg	343/106.
4125836	Nov, 1978	Stavis	343/102.

Other Refs:
Primary Examiner: Tubbesing, T. H.
Assistant Examiner:
Attorney: Oblon, Fisher, Spivak, McClelland & Maier