On embodiment pertains to a method including determining if an amplitude of an error signal has entered steady state. If the amplitude of the error signal has not entered steady state, then amplify with a high gain the amplitude of the AC component of the error signal. If the amplitude of the error signal has entered steady state, then initiate a timer. Determining if the amplitude of the error signal has remained in steady state while the timer runs. If the amplitude of the error signal has remained in steady state while the timer runs, then amplify with a low gain the amplitude of the AC component of the error signal.