Goniometer circuit for VOR system
US4186399A · kind A · utility
0Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1978 |
| Grant date | Jan 29, 1980 |
| Priority date | — |
| Expiry date | Oct 27, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S1/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.