Patent ID: 11876528
Assignee: TSINGHUA UNIVERSITY
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An analog-to-digital conversion circuit comprising:
N sampling and conversion modules connected in parallel, configured to simultaneously sample and sequentially convert first analog signals of N channels to output second analog signals, wherein each of the sampling and conversion modules includes a plurality of sampling capacitors connected in parallel, wherein N is an integer greater than 1;
a comparator connected to the N sampling and conversion modules, configured to compare the second analog signals respectively to obtain comparison signals; and
a control module connected to the N sampling and conversion modules and the comparator, the control module configured to control the N sampling and conversion modules to output converted digital signals based on the comparison signals;
wherein each of the sampling and conversion modules further includes a conversion switch that includes a first terminal connected to the plurality of sampling capacitors and a second terminal connected to the comparator;
wherein the control module is configured to:
in a sample-and-hold phase, control the N sampling and conversion modules to simultaneously sample and hold the first analog signals of N channels; and
in an analog-to-digital conversion phase, control the conversion switches of the N sampling and conversion modules to close in turn so that the analog-to-digital conversion circuit performs analog-to-digital conversion on the first analog signals of N channels sequentially.