The system contains a first input receiving a signal from the amplifier input. A second input receives a signal from the amplifier output. A gain modification device is connected to the second input thereby reducing an amplitude of the signal from the amplifier output. A difference element connected to the gain modification device and the first input subtracts one of the first input and the second input from the other of the first input and the second input and outputting a difference voltage. A comparator, connected to the difference element and a threshold voltage source, compares the difference voltage to a threshold voltage. A disabling device is connected to the comparator and an output stage of the amplifier, wherein an output stage of the amplifier is disabled when the threshold voltage exceeds the difference voltage.