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

Claim 2:
3. The analog-to-digital conversion circuit according to claim 2, wherein a first analog signal of a channel corresponding to each sampling and conversion module is input at a first input terminal of the sampling and conversion module, a first control signal is input at a second input terminal of the module, and a second analog signal is output in response to the first conversion switch being closed,
each sampling and conversion module includes U first sampling capacitors, U sets of first hold switches, and a first conversion switch, U being an integer greater than or equal to 1, one terminal of each of the first sampling capacitors is connected to the first conversion switch, the other terminal of the capacitors is connected to one terminal of a set of first hold switches, and the other terminal of the set of first hold switches is respectively connected to one of the first analog signal, a device voltage VDD, a ground GND, or a preset direct current voltage,
the second analog signal is input at a first input terminal of the comparator, a reference signal is input at a second input terminal of the comparator, and a first comparison signal is input at an output terminal of the comparator, and
the first comparison signal is input at an input terminal of the control module, a converted first digital signal is output at a first output terminal of the control module, and the first control signal is output at a second output terminal of the control module.