Patent ID: 9685916
Date: 2017-06-20
CPC Classifications: G06F,H03F,H04R

Claim:
1. An electronic device comprising: an audio connector port, the audio connector port comprising a ground terminal and one or more audio output terminals; a first audio amplifier comprising an input terminal and an output terminal, wherein the output terminal of the first audio amplifier is coupled to a first audio output terminal of the one or more audio output terminals; a multiplexer having a plurality of input terminals and an output terminal coupled to the input terminal of the first audio amplifier; an audio circuit to generate an audio signal to a first input terminal of the plurality of input terminals of the multiplexer; and a sense circuit to generate an analog voltage to a second input terminal of the plurality of input terminals of the multiplexer, wherein, in a first mode of operation, the multiplexer couples the audio signal on the first input terminal of the multiplexer through the first audio amplifier to the first audio output terminal, and in a second mode of operation, the multiplexer couples the analog voltage on the second input terminal of the multiplexer through the first audio amplifier to the first audio output terminal.