| 摘要 |
In an embodiment of the present invention, a circuit includes a forward path circuit which contains the following parts: an auto-zero switch which is combined between an input of an amplifier and an output of the amplifier; a first chopping circuit which has an input combined with an input of the forward path circuit, and an output combined with the input of the amplifier; and a second chopping circuit which has an input combined with the output of the amplifier, and an output combined with an output of the forward path circuit. The circuit additionally includes a feedback circuit which contains the following parts: a feedback switch; a feedback capacitor which includes a first end part combined with an output of the amplifier; a third chopping circuit which is combined between the input of the forward path circuit and a first end part of the feedback switch; and a fourth chopping circuit which is combined between a second end part of the feedback switch and a second end part of the feedback capacitor. |
