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The circuit shows that NMOS can transmit low voltage. First, disconnect the left switch, close the right switch, and charge the right capacitor, and finally it is 2V. The disconnect the right switch, close the left switch, let the capacitor discharge to the ground through the NMOS, observes the voltage on both sides of the capacitor, and final value is 0. Conversely, to understand this, the low voltage of “ground” is transferred to the capacitor, which shows that NMOS can transfer the low voltage without loss.
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