Gating signal
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A digital signal or pulse (which is also called trigger sometimes) that provides a time window so that a particular event or signal from among many will be selected and others will be eliminated or discarded.
IN A MULTIPLE INPUT and/OR gate, a signal at one of the inputs triggers the passage of a signal at other inputs.i.e, it passes through or blocks the signal at other inputs. Such a signal is called a GATING SIGNAL.