Noise muting circuit in FM receiver
US4146842A · kind A · utility
3Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1977 |
| Grant date | Mar 27, 1979 |
| Priority date | — |
| Expiry date | Jun 7, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G11/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an FM receiver having an amplifier for amplifying an FM signal of intermediate frequency applied to an input terminal, and a phase multiplier type FM demodulator for demodulating the FM signal of intermediate frequency amplified by the amplifier, a noise muting circuit is disposed between the demodulator and the amplifier for muting noise transmitted from the amplifier to the demodulator when no FM signal input appears at the input terminal. This noise muting circuit comprises a pair of diodes connected in inverse-parallel with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.