Patent ID: 9673762
Date: 2017-06-06
CPC Classifications: H03F

Claim:
1. An apparatus, comprising: an input node configured to receive an input analog signal for reproduction by a transducer; a pre-power stage block coupled to the input node and configured to process the input analog signal, wherein the pre-power stage block comprises a pulse-width modulation (PWM) generator with a configurable ramp up/down gain; a power stage block coupled to the pre-power stage block and configured to amplify the processing input analog signal; a feedback loop coupled between an output of the power stage and an input of the pre-power stage block; and a controller coupled to the pulse-width modulation (PWM) generator and configured to vary the configurable gain of the pre-power stage block via the pulse-width modulation (PWM) generator during a transition of the feedback loop.