公开(公告)号：US08299952B1

公开(公告)日：2012-10-30

申请号：US13093649

申请日：2011-04-25

Applicant: Jin-Fu Lin ,  Chia-Hsuan Huang

Inventor： Jin-Fu Lin ,  Chia-Hsuan Huang

IPC: H03M1/12

CPC classification number: H03K5/00 ,  H03F3/005 ,  H03F3/45475 ,  H03F3/45986 ,  H03M1/0604 ,  H03M1/0695 ,  H03M1/442

Abstract: A switched-capacitor circuit which comprises a first sampling capacitor, a second sampling capacitor, an op-amp, a third capacitor, and a fourth capacitor is provided. The first sampling capacitor is disposed to sample an input signal in a sampling phase. The second sampling capacitor is disposed to sample the input signal in the sampling phase. Wherein, in a first amplify phase, the third capacitor stores an offset voltage of the op-amp, the fourth capacitor stores the electric charges which are flowed from the first sampling capacitor and the second sampling capacitor, and in a second amplify phase, the fourth capacitor gives the stored electric charges back to the first sampling capacitor and the second sampling capacitor.

Abstract translation: 提供了包括第一采样电容器，第二采样电容器，运算放大器，第三电容器和第四电容器的开关电容器电路。 第一采样电容器设置成在采样阶段对输入信号进行采样。 第二采样电容器设置成在采样阶段对输入信号进行采样。 其中，在第一放大相位中，第三电容器存储运算放大器的偏移电压，第四电容器存储从第一采样电容器和第二采样电容器流出的电荷，并且在第二放大相位中， 第四电容器将存储的电荷返回到第一采样电容器和第二采样电容器。