STEREO DEMODULATION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a stereo demodulation circuit which holds the separation of an alto region sensing a stereo and which controls the separation of a treble region sensing a noise. SOLUTION: The stereo demodulation circuit includes a matrix circuit which forms and outputs an L signal and an R signal based on a main channel signal and a sub-channel signal in a stereo signal. The stereo demodulation circuit also includes an attenuation circuit which inputs the sub-channel signal and attenuates the frequency higher than a predetermined frequency of the sub-channel as the frequency increases, at the prestage of the matrix circuit. COPYRIGHT: (C)2005,JPO&NCIPI