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How does an NMOS switch translate voltage?

April 26, 2017NMOS Switch translate voltage

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How does an NMOS switch translate voltage?

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The NMOS transistor in the switch core clamps the input signal voltage to V_clamp (Vout) at the output due to the threshold of NMOS transistor (V_ threshold). V_clamp = Vcc V_threshold. If the input signal is below V_clamp, the switch will pass through the full voltage range to the output without clamping. If the input voltage is higher than V_clamp, the switch will clamp the output at V_clamp. Designers can select the clamping voltage by adjusting the Vcc voltage.