Analog-to-digital conversion method, analog-to-digital converter, and base station

Abstract

The present disclosure provides an analog-to-digital conversion method applied to an analog-to-digital converter and including: for any clock cycle, amplifying, through an inter-stage gain amplifier, a first residual stored in a sampling capacitor corresponding to a first analog-to-digital conversion channel, and sampling the amplified first residual through a stage-2 sub-analog-to-digital converter corresponding to the first analog-to-digital conversion channel; sampling and quantizing an analog signal through a stage-1 sub-analog-to-digital converter, and storing an obtained second residual in a sampling capacitor corresponding to a second analog-to-digital conversion channel; and generating a digital signal according to output signals of the stage-1 and stage-2 sub-analog-to-digital converters; and for any two adjacent clock cycles, an analog-to-digital conversion channel serving as the second analog-to-digital conversion channel in a current clock cycle serves as the first analog-to-digital conversion channel in a next clock cycle. The present disclosure further provides an analog-to-digital converter and a base station.