| 摘要 |
An analog circuit 20 includes an amplifier 30 with a positive input node, a negative input node, a positive output node and a negative output node. A first capacitor 32 is coupled between the negative input node and an analog signal node. A second capacitor 34 is coupled between the positive input node and a reference voltage node. In addition, a third capacitor 36 is coupled between the positive input node and the negative output node and a fourth capacitor 38 is coupled between the negative input node and the positive output node. A first switch 40 is coupled between the third capacitor 36 and the negative output node and a second switch 42 is coupled between the fourth capacitor 38 and the positive output node.
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