Patent ID: 9143153
Filing Date: 2015-09-22
Classification: H03M

Abstract:
1. An analog to digital conversion method, comprising: receiving an analog input signal by using a coarse analog to digital converter (ADC) and a fine ADC; generating a first digital signal according to the analog input signal by using the coarse ADC; comparing each bit of the second-most significant bit of the first digital signal to the least significant bit of the first digital signal with the most significant bit of the first digital signal to generate at least one comparison result; according to the at least one comparison result, directly controlling switching of a high bit capacitor array of the fine ADC, so as to convert the analog input signal received by the fine ADC into a residual signal; generating a second digital signal according to the residual signal by sequentially switching a low bit capacitor array of the fine ADC by using the fine ADC; and combining the first digital signal and the second digital signal to generate a digital output signal.