Muting circuit

Details Muting circuit Muting circuit

1973-05-17

1976-02-24

Britton, Howard W.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

179 1GQ, 1791004ST, 307233R, 325478, 328138, H04B 110

Patent

active

039406989

ABSTRACT:
A muting circuit comprises, substantially, a gate circuit for passing or not passing input signals and a circuit for forming a control signal for controlling the gating operation of the gate circuit. The control signal forming circuit has a circuit for detecting the level of a carrier wave in the input signal. A first time constant circuit has a very small time constant .tau..sub.1. A second time constant circuit exhibits a delay time constant of .tau..sub.2 (where .tau..sub.2 >>.tau..sub.1) when a carrier wave component exists in the input and a delay time constant which becomes substantially zero when a carrier wave component does not exist. A third time constant circuit of a time constant .tau..sub.3 (where .tau..sub.3 >.tau..sub.2) is with a 180.degree. phase relationship relative to the second time constant circuit.

REFERENCES:
patent: 3325738 (1967-06-01), Busby et al.
patent: 3628058 (1971-12-01), Espe
patent: 3660765 (1972-05-01), Glasser et al.
patent: 3662113 (1972-05-01), Von Recklinghausen
patent: 3686471 (1972-08-01), Takahashi

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