04107613 is referenced by 33 patents and cites 5 patents.

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.

Title
Wireless microphone with FM receiver muting system responsive to excessive undesired AM level or low AGC control level
Application Number
5/767972
Publication Number
4107613
Application Date
February 11, 1977
Publication Date
August 15, 1978
Inventor
Kenneth W Belt
Berwyn
IL, US
Daniel L Queen
Chicago
IL, US
Agent
Hill Gross Simpson Van Santen Steadman Chiara & Simpson
Assignee
Perma Power
IPC
H04B 1/10
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