Mpx stereo signal demodulator

Details Mpx stereo signal demodulator Mpx stereo signal demodulator

H - Electricity

03

D

329/2

H03D 1/22 (2006.01) H04H 5/00 (2006.01)

Patent

CA 1073059

SO853 MPX STEREO SIGNAL DEMODULATOR ABSTRACT OF THE DISCLOSURE A multiplex (MPX) stereo signal demodulator includes a first differential amplifier supplied with a composite stereo signal and second, third differential amplifiers cascode-con- nected to the first differential amplifier and supplied with a 38 KHz subcarrier signal so as to obtain, by demodulation, a pair of audio signals as the multiplying results of the composite and subcarrier signals. A fourth differential amplifier supplied with the composite stereo signal, the in- put level of which is adjustable, is provided and the output signal therefrom is mixed with the pair of audio signals through a current mirror circuit so as to compensate the separation ratio therebetween.

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