Patent ID: 8502718

Claim:
An analog-to-digital converter, receiving a first audio signal from a microphone sensor, and receiving a first channel selection signal and a clock signal, comprising: a toggle detection module, detecting whether the first channel selection signal is toggling between a logic low level and a logic high level to generate a control signal; a first data processing module, processing the first channel selection signal to generate a second channel selection signal; a second data processing module, converting the first audio signal from analog to digital to generate a second audio signal; and a multiplexer, if the control signal indicates that the first channel selection signal is toggling between the logic low level and the logic high level, outputting data bits of the second channel selection signal as an output signal of the analog-to-digital converter when the clock signal oscillates to the logic low level, and outputting data bits of the second audio signal as the output signal of the analog-to-digital converter when the clock signal oscillates to the logic high level.