The invention discloses a
phase domain analog-
digital converter comprising a reuse combiner and a reuse
comparator, wherein the combiner performs different weights of amplification or minification on in-phase input or orthogonal input analog signals; the
comparator compares the amplified or minified in-phase
signal with the amplified or minified orthogonal
signal to acquire quantized digital information; amplification and minification operation of the combiner is equivalent to dividing a complex plane into different sections; comparison operation of the
comparator is equivalent to positioning the phase of the input
signal into the section of the complex plane; the combiner respectively generates different magnifications according to a previous quantization result of the comparator at different moments, and the comparator correspondingly generates a digital quantization output for the next moment until
phase quantization with specific accuracy is completed. According to the
phase domain analog-
digital converter provided by the invention, the active circuit is reused as much as possible in the case of fully considering characteristics of the
receiver under different modulation
modes and code rates, quantization difficulty of the phase information is greatly simplified, and
power consumption and cost of the converter are reduced.