Patent ID: 8044717

Claim:
A method of forming an amplifier circuit comprising: forming a first amplifier having a first input, a second input, and having an output coupled to a first output of the amplifier circuit; forming a second amplifier having a first input, a second input, and having an output coupled to a second output of the amplifier circuit; configuring the amplifier circuit to have an input coupled to a capacitor external to the amplifier circuit; and configuring the amplifier circuit to form a first time interval and selectively couple the amplifier circuit to charge the capacitor during the first time interval, and to subsequently form a second time interval and selectively decouple the amplifier circuit from charging the capacitor and to also couple the amplifier circuit to amplify an input signal, including configuring the amplifier circuit to selectively couple the first input of the first amplifier to the first input of the second amplifier and to subsequently decouple the first input of the first amplifier from the first input of the second amplifier.