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

Claim 20:
21. The analog-to-digital conversion circuit according to claim 20, wherein said controlling the N sampling and conversion modules to simultaneously sample and hold the input first analog signals of N channels in the sample-and-hold phase comprises:
controlling the third conversion switches of the N positive sampling and conversion units and the fourth conversion switches of the N negative sampling and conversion unit to open;
controlling opened/closed states of U sets of second conversion switches in each of the positive sampling and conversion units, so that the other terminal of the U second sampling capacitors in the positive sampling and conversion unit is connected to the corresponding positive first analog signal; and
controlling opened/closed states of the U sets of third conversion switches in each of the negative sampling and conversion units, so that the other terminal of the U second sampling capacitors in the negative sampling and conversion unit is connected to the corresponding negative first analog signal.