Wireless microphone with FM receiver muting system responsive to excessive undesired AM level or low AGC control level
US4107613A · kind A · utility
36Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1977 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | Feb 11, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless microphone and receiver in which the receiver output is muted whenever there is insufficient carrier present at the receiver to provide a clear noise free recovered audio or when there is radio frequency interference of a nature in strength to cause amplitude modulation on the IF envelope at the input to the FM detector. The invention places the receiver into a sampling mode whenever it is in a muted condition to conserve batteries and to provide a visual indication of such condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.