An improved system, which automatically and dynamically adjusts the bandwidth, employs first and second signal level evaluation circuits (11, 12), a comparison stage (13) which compares their outputs, and a variable-bandwidth filter stage (6, 14) controlled by the comparison stage. ![]() ![]() However, it is desirable to again broaden the bandwidth once the interference has subsided. It is known to detect such interference and suppress it by narrowing bandwidth in the Intermediate Frequency (IF) signal path. Abstract: FM radio receivers, particularly in moving vehicles, are subject to intermittent adjacent-channel interference.
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