FM RECEIVER

摘要

The receiver includes a frequency-locked loop comprising a VCO, a mixer circuit connected to an aerial input, an IF portion having an IF filter, an FM detector and a loop filter arrangement. A loop amplifier adjusts the transfer characteristic of the loop. The loop amplifier is connected to a control input of the VCO for feedback of the modulation signal of the received FM signal. The loop filter arrangement includes a low pass filter which selects the audio frequency stereo sum signal from a parallel with the low pass filter and selects the stereo difference stereophonic FM-mutiplex signal and a band filter which is in signal which is amplitude modulated on a suppressed stereo subcarrier from a stereophonic FM-multiplex signal.