Patent ID: 11894857
Assignee: SHANGHAI UNITED IMAGING MICROELECTRONICS TECHNOLOGY CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 13:
14. A readout circuit, comprising:
a signal sampler, comprising a plurality of channels;
a plurality of integrators, connected to the plurality of channels and having a one-to-one relationship with the plurality of channels;
a signal processor, comprising a first operational amplifier, a sampling input of the first operational amplifier being connected to outputs of the plurality of integrators, respectively; and
an analog-digital converter, an input of the analog-digital converter being connected to an output of the first operational amplifier;
wherein the signal processor further comprises a resetting capacitor and holding switches;
a first terminal of the resetting capacitor is connected to the sampling input of the first operational amplifier, and a second terminal of the resetting capacitor is connected to the output of the first operational amplifier;
one of the holding switches is connected between the first terminal of the resetting capacitor and a common-mode voltage input of the signal processor, and another of the holding switches is connected between the second terminal of the resetting capacitor and a common-mode voltage output of the signal processor.