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

Claim 9:
10. The analog-to-digital conversion circuit according to claim 5, wherein the analog-to-digital conversion circuit further comprises a shared conversion module configured to convert quantized margin signals of the first analog signals of N channels,
the shared conversion module includes V first shared capacitors connected in parallel, V sets of first shared switches, and a second conversion switch, and the shared conversion module is connected respectively to the N sampling and conversion modules and the comparator through the second conversion switch, wherein V is an integer greater than or equal to 1,
wherein the control module is further configured to control the second conversion switch to open during a first U times of analog-to-digital conversions in the i-th conversion cycle of the analog-to-digital conversion phase, and control the second conversion switch to close after the U-th analog-to-digital conversion is completed, and the control module outputs a 1st second control signal based on the first comparison signal of the U-th comparison,
taking the U-th second analog signal as a quantized margin signal, the analog-to-digital conversion circuit performs V analog-to-digital conversions on the quantized margin signal in a successive approximation manner.