Multiplexer and leakage current control method

A leakage current control method, applied to a multiplexer, the multiplexer comprising a first selection circuit, a second selection circuit and a leakage current control circuit;

• the method comprising:
• selectively turning on the first selection circuit according to a first selection signal to transmit a first input signal to an output node to generate an output voltage;
• selectively turning on a first switch of the second selection circuit according to a second selection signal, and turning on a second switch of the second selection circuit according to a first control signal and a second control signal to transmit a second input signal to the output node when the first switch is turned on;
• and
• comparing the output voltage with a plurality of reference voltages by the leakage current control circuit to generate a plurality of detection signals when the first selection circuit is turned on, and selectively adjusting a level of the first control signal or the second control signal according to the plurality of detection signals and the second selection signal.