Patent ID: 7589590

Claim:
An apparatus comprising: at least one half bridge comprising: signal processing circuitry including first and second inputs and at least one output; a driver stage coupled to the at least one output of the signal processing circuitry and configured to create at least one output, one of the at least one outputs of the driver stage suitable to couple to a load; a first feedback loop coupling the at least one output of the driver stage to a first input of the signal processing stage; and a second feedback loop coupling the at least one output of the driver stage to a second input of the signal processing stage, where signals on the first and second feedback loops have inverted polarity; wherein the at least one half bridge further comprises a differential feedback block, wherein the first and second feedback loops pass through the differential feedback block, and wherein the differential feedback block comprises at least one of an analog filter, digital logic, an analog function, or a plurality of inverters configured to cause a delay.