Patent ID: 8792650

Claim:
A driver circuit comprising: a first driver amplifier that is configured to generate a first output in response to an input connected to a first reference voltage and a first audio input; a second driver amplifier that is configured to generate a second output in response to an input connected to the first reference voltage and a second audio input; and a common mode (CM) amplifier, coupled to the first driver amplifier and the second driver amplifier, the CM amplifier being configured to generate an output of the CM amplifier in response to an input connected to a second reference voltage and an input connected to the first reference voltage, the first reference voltage being a divided version of the output of the common mode (CM) amplifier, wherein gains of the first driver amplifier, second driver amplifier and the CM amplifier are equal and wherein noise at the output appears across a plurality of resistors coupled at the outputs of the first driver amplifier, second driver amplifier and the CM amplifier and cancels with respect to the output of the CM amplifier.