Automatic noise reduction system of FM stereo receiver
US4029906A · kind A · utility
11Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1976 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Apr 14, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G5/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed is an automatic noise reduction system of FM stereo receiver wherein the input level and carrier frequency deviation of an FM stereo transmission signal received by an antenna are detected and, when at least either one of the input level and carrier frequency deviation decreases, the separation between first and second audio outputs of a stereo demodulator for demodulating the FM stereo transmission signal is decreased and simultaneously high frequency components on the first and second audio outputs are attenuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.