FM demodulation circuit
US6020784A · kind A · utility
12Cited by
1References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An FM demodulation circuit includes a phase conversion circuit which converts a frequency variation of an input signal into a phase variation and has a variable conversion characteristic, and a control current source circuit which outputs, when the level of the input signal drops lower than a predetermined level, control current to vary the conversion characteristic of the phase conversion circuit so that the demodulation sensitivity may be raised.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.