Four-channel stereophonic reproducing system for reproducing dis

Details Four-channel stereophonic reproducing system for reproducing dis Four-channel stereophonic reproducing system for reproducing dis

1974-04-24

1976-02-03

Fears, Terrell W.

179 1GQ, 1791004D, G11B 300, G11B 374, H04B 500

Patent

active

039366197

ABSTRACT:
There is provided a four-channel stereophonic reproducing system wherein each muting circuit comprises a limiter for limiting the carrier level of a frequency-modulated signal to a predetermined level, a control circuit actuated by the output of the limiter and a switching circuit controlled by the control circuit, whereby when the carrier level of the frequency-modulated signal decreases, the detected output of the sub-channel signal including a large amount of noise components is blocked by the muting circuit.

REFERENCES:
patent: 3686471 (1972-08-01), Takahashi
patent: 3842211 (1974-10-01), Metro

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