#amplification.increase__gain  the amount of increase in signal power or voltage or current expressed as the ratio of output to input
  supertype:  increase.amount__increment  the amount by which something increases; "they proposed an increase of 15 percent in the fare"
  subtype:  loop_gain  (telecommunications) 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"

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