Stereophonic signal demodulator for a pair of composite signals

Details Stereophonic signal demodulator for a pair of composite signals Stereophonic signal demodulator for a pair of composite signals

1975-02-10

1976-08-10

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

179 15BT, 325472, 329103, 329112, 329122, 329129, 329147, 329204, H03D 318, H03D 324, H04H 500

Patent

active

039744531

ABSTRACT:
A stereophonic signal demodulator includes a frequency discriminator which produces a pair of composite stereo signals in response to an FM stereophonic signal applied thereto, the pair of composite stereo signals having opposite polarities to each other. A pair of stereo demodulators is supplied with at least one of the pair of composite stereo signals to produce left and right channel audio signals therefrom, respectively. The other of the pair of composite stereo signals is reduced in amplitude and is supplied to a pair of adders whereat it is correspondingly summed with the respective left and right channel audio signals to eliminate crosstalk components contained therein. In one embodiment, the reduced amplitude composite stereo signal is supplied to the respective adders by a further pair of stereo demodulators. One example of a stereo demodulator comprises a switching-type demodulator having a carrier leak suppression effect.

REFERENCES:
patent: 3538259 (1970-11-01), Brahman
patent: 3617641 (1971-11-01), Fiet et al.
patent: 3714595 (1973-01-01), Denenberg et al.

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