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一种新型高线性度采样开关的设计

作者：时间：2011-12-23 来源：网络

在导通状态，当输入和输出之间的电压差变为0时，比较器输出低电平，此时驱动S1再次打开。

图2为设计中的实际电路架构，图3为输入电压与开关管栅极电压的变化曲线，可看到当输入源(漏)级正弦信号变化时，采样到的栅极电压跟随输入信号，即源栅电压Vsg为恒定常数，因此衬底效应被抑制，开关的线性度有了较大提高。

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关键词：设计开关采样线性新型

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