Patent ID: 8421540

Claim:
A system for short circuit protection for an amplifier, the system comprising: a first input receives a signal from an amplifier input for the amplifier; a second input receives a signal from an output of the amplifier; a gain modification device connected to the second input thereby reducing an amplitude of the signal from the amplifier output; a difference element subtracting 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, wherein the difference voltage is compared to a threshold voltage; and a disabling device 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, wherein the difference element further comprises: a first difference element subtracting the first input from the second input and outputting a first difference voltage, wherein the comparator is connected to the first difference element; and a second difference element subtracting the second input from the first input and outputting a second difference voltage.