Patent ID: 8749411

Claim:
An analog-to-digital conversion device, comprising: a first level adjustment unit, transmitting a test signal in an adjustment mode, and transmitting a first input signal in an operation mode; an analog-to-digital converter (ADC), converting the test signal or the first input signal to generate a test data stream or a first output data stream; and a linear range detection unit, wherein in the adjustment mode, the linear range detection unit obtains a conversion curve of the ADC by using the test data stream and determines whether to adjust an offset control information according to a linear range of the conversion curve, and in the operation mode, the linear range detection unit continues to output the offset control information, wherein before transmitting the first input signal, the first level adjustment unit adjusts a direct-current (DC) level of the first input signal according to the offset control information to allow the first input signal to be within the linear range of the conversion curve.