Goniometer circuit for VOR system
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United States of America Patent
Stats
-
Jan 29, 1980
Grant Date -
N/A
app pub date -
Oct 27, 1978
filing date -
Oct 27, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
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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