Intermediate frequency sound signal processing circuit for satellite receiver, has demodulation circuit with chip to demodulate signal into sound signal, and selection circuit to selectively provide sound signal in stereo sound/mono mode

摘要

The circuit has an intermediate frequency selection circuit (110) for selecting an intermediate frequency sound signal with constant frequency from an input intermediate frequency sound signal based on a signal frequency, and providing the selected signal on a corresponding channel. A demodulation circuit (130) has a U2860B chip (131) for demodulating the selected signal into a sound signal. A sound output selection circuit (140) selectively provides the demodulated sound signal in stereo sound mode or mono mode.