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Abstract

An apparatus and a method using logical functions to improve the performance of a noise gate. When the input or triggering signal exceeds the gate threshold, a first bistable logic element is set. Simultaneously, a second monostable logic element is triggered for a set time-out. A third logic element determines if the second monostable logic element is reset after the time-out and the triggering signal is below the gate threshold, at which time the first bistable logic element is forced to the reset condition. Under no other condition can the first bistable logic element be reset. The logic output of the first bistable logic element controls the noise gate, causing it to open when set and close when reset. The advantage of this method over prior art is a more decisive gate operation whereby a short transient triggering signal can fully and definitely trigger the gate open.

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First Claim