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

Claim 21:
22. The analog-to-digital conversion circuit according to claim 20, wherein in the i-th conversion cycle of the analog-to-digital conversion phase, the third conversion switch of the i-th positive sampling and conversion unit and the fourth conversion switch of the i-th negative sampling and conversion unit are closed, and the analog-to-digital conversion circuit performs U analog-to-digital conversions on the first analog signal of the i-th channel in a successive approximation manner,
for the u-th analog-to-digital conversion of the i-th conversion cycle, the i-th positive sampling and conversion unit outputs the u-th positive second analog signal based on the positive first analog signal of the i-th channel and the u-th positive first control signal, wherein 1≤u≤U and u is an integer,
the i-th negative sampling and conversion unit outputs the u-th negative second analog signal based on the negative first analog signal of the i-th channel and the u-th negative first control signal,
the comparator compares the u-th positive second analog signal with the u-th negative second analog signal to output a second comparison signal of the u-th comparison,
based on u<U, the control module outputs the (u+1)-th positive first control signal and the (u+1)-th negative first control signal based on the second comparison signal of the u-th comparison, and
based on u=U, the control module outputs a second digital signal corresponding to the first analog signal of the i-th channel based on the second comparison signals of U comparisons.