Patent ID: 7042256

Claim:
An operational amplifier connected to first and second transistors of an H-bridge for sinking and sourcing current, the operational amplifier having a differential input and an output and comprising: a transconductance circuit connected to receive the differential input and provide an output, wherein the output is connected to the second transistor of the H-bridge; a gain circuit connected to receive the output from the transconductance circuit, wherein the gain circuit includes a transistor that is matched to the second transistor of the H-bridge; a buffer circuit connected between the gain circuit and the first transistor of the H-bridge; a first feedback network comprising: a level shift circuit connected to the output of the operational amplifier; and a clamping circuit connected between the level shift circuit and an input of the buffer circuit; and a second feedback network comprising: a level shift circuit connected to the output of the operational amplifier; and a clamping circuit connected between the level shift circuit and the first transistor of the H-bridge.