Mute circuit for use with switching relays

Abstract

A mute circuit for momentarily inhibiting signal travel in the signal path having an input terminal and an output terminal in response to operation of a coil-operated relay. The signal path will preferably include a plurality of channel in parallel. A plurality of switch responsive coil-operated relays are disposed in the signal path with a separate unidirectional signal path coupling each of the coils of each of the coil-operated relays to a muting line with the coil of each said relay providing a signal on the muting line responsive to collapse of the magnetic field developed in the relay coil by the flow of current therethrough. A plurality of time controlled switching devices are responsive to a signal on the muting line from a coil to momentarily inhibit signal travel in the signal path. The timing circuit is included in the time controlled switching device to control the length of operation of the switch in response to a signal on the muting circuit. The time controlled switching device includes a FET transistor. Each channel includes a coil operated relay, the coil operated relay of each channel being coupled to the muting line.

Dependencies are inferred from the claim text.