Variable frequency oscillator
US4055817A · kind A · utility
6Cited by
4References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 29, 1976 |
| Grant date | Oct 25, 1977 |
| Priority date | — |
| Expiry date | Oct 29, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/1237
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A variable frequency oscillator comprises an oscillating loop and a variable phase shifter for imparting one of two different phase shifts depending upon the polarities of a DC control voltage to a signal from the oscillating loop. The phase-shifted signal has its amplitude controlled by the amplitude of the control voltage and is combined with the signal in the oscillating loop. The vector sum of the combined signals determines the phase angle of the oscillator signal and hence the frequency thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.