Frequency selection circuit in stereo / mono mode

摘要

In this case, in the stereo / mono receiving machine, the audio selection circuit in stereo audio, especially in stereo mode, shows high audio, limits high audio in mono City, and eliminates noise.In addition, the high-frequency signal is the intermediate frequency reproduction of the sound output by the reproduction of the intermediate frequency audio signal.The signal output at the frequency modulation part of the voice is a stereo detection and voice processing unit for stereo / mono signal detection processing,The audio audio output by the stereo detection and voice processing unit is modulated according to the audio audio audio and audio frequency.The frequency is amplified from the speech signal output by edge selection to a small level, and the circuit is composed of the audio parts of the first speaker and the second audio output.Realized.