Interference signal suppressor for a radio receiver
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United States of America Patent
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-
Oct 31, 1989
Grant Date -
N/A
app pub date -
Apr 25, 1986
filing date -
Apr 29, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An FM interference suppressor comprises two FM demodulators, one of which is fed with an input signal via an envelope detector and is arranged to feed a zero frequency detector and a phase inverter to produce a baseband composite signal comprising wanted and unwanted modulation. The other FM demodulator is fed directly with an input signal directly to produce a baseband signal comprising the unwanted modulation alone. A combiner is provided for subtractively combining the baseband signal and the baseband composite signal to produce the wanted modulation signal.
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