1. (telecommunication) the gain of a feedback amplifier or system as a function of how much output is fed back to the input; - Example: "if the loop gain is too great the system may go into oscillation"
WordNet (r) 3.0 (2006):
loop gain
n 1: (telecommunication) the gain of a feedback amplifier or
system as a function of how much output is fed back to the
input; "if the loop gain is too great the system may go
into oscillation"