Patent ID: 9036835
Filing Date: 2015-05-19
Classification: H03F

Abstract:
1. An apparatus comprising: a single substrate having circuitry formed on the single substrate, the single substrate is positioned within an integrated circuit package, the circuitry including an audio power amplifier disposed on a first substrate area of the single substrate and, an alternating-current to direct-current power converter disposed on a second substrate area of the single substrate and coupled to the audio power amplifier to supply power to the audio power amplifier, wherein either the first substrate area comprises substantially a subset of the second substrate area, or the second substrate area comprises substantially a subset of the first substrate area; control circuitry coupled to the audio power amplifier and the alternating-current to direct-current power converter, the control circuitry being configured to receive a control signal generated by an accelerometer sensor including data representative of the output of a speaker and to modify an operating characteristic of the alternating-current to direct-current power converter, to modify an operating characteristic of the audio power amplifier by adjusting a bias current, a bias voltage or both to affect an operating point of the audio power amplifier or by adjusting a bias point, responsive to the control signal; and a digital signal processing circuitry coupled to the audio power amplifier in a single package and configured to conduct a frequency analysis on an input signal.