| 摘要 |
An apparatus comprises a first stage, a second stage, and a switch circuit. The first stage and the second stage are coupled between a first reference voltage and a second reference voltage. The first stage has a first input end for receiving an input signal and a first output end for outputting a first output signal. The second stage has a second input end for receiving the first output signal from the first output end of the first stage and a second output end for outputting a second output signal. The switch circuit is coupled between the second stage and at least one of the first reference voltage and the second reference voltage for receiving a power control signal and for turning on or turning off according to the power control signal such that the current leakage of the second stage is reduced.
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