Digital quartz-stabilized FM discriminator
US4642574A · kind A · utility
1Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1985 |
| Grant date | Feb 10, 1987 |
| Priority date | — |
| Expiry date | Oct 22, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/241
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital quartz stabilized FM discriminator which is linear and temperature independent and frequency stable and includes a circuit having a phase comparator which receives an input signal and an input from a reversible divider (3) which produces the angular frequencies f.sub.u and f.sub.o of the discriminator. The reversible divider divides a quartz stabilized reference frequency signal under control of the output signal from the phase comparator. A discriminator output signal is obtained by passing the output signal of the phase comparator through a low pass filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.