US 12,250,001 B1
Analog-to-digital converter
Guangyang Qu, Hangzhou (CN); and Chen Lai, Hangzhou (CN)
Assigned to Silergy Semiconductor Technology (Hangzhou) LTD, Hangzhou (CN)
Filed by Silergy Semiconductor Technology (Hangzhou) LTD, Zhejiang (CN)
Filed on Oct. 20, 2022, as Appl. No. 17/969,914.
Claims priority of application No. 202111304548.1 (CN), filed on Nov. 5, 2021.
Int. Cl. H03M 1/12 (2006.01); H03M 1/06 (2006.01); H03M 1/42 (2006.01)
CPC H03M 1/1255 (2013.01) [H03M 1/0687 (2013.01); H03M 1/42 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An analog-to-digital converter, comprising:
a) a charge distribution and holding module configured to sample a to-be-converted signal, and to perform subtraction on the to-be-converted signal and a target reference voltage by charge distribution, in order to generate a positive-phase output voltage and a negative-phase output voltage on a first electric rail and a second electric rail, respectively, wherein a difference between the positive-phase output voltage and the negative-phase output voltage is equal to a difference between the to-be-converted signal and the target reference voltage;
b) a common-mode voltage compensation module coupled with the first electric rail and the second electric rail, and being configured to inject common-mode charges to compensate the distributed charges of the charge distribution and holding module, and to reduce a difference between a common-mode output voltage of the charge distribution and holding module and an expected value; and
c) a comparator configured to provide a logic signal based on a comparison between the positive-phase output voltage and the negative-phase output voltage, wherein the logic signal corresponds to a target digital signal of the analog-to-digital converter.