<p>A semiconductor device includes a voltage comparing circuit, an amplifying circuit and a control circuit. The voltage comparing circuit includes first and second transistors that are coupled in a differential manner to compare first and second input voltages. The amplifying circuit amplifies an output voltage of the voltage comparing circuit to produce an amplified signal and holds the amplified signal. The control circuit is configured, when activated, to cut off a current path though which a current flows from the amplifying circuit. The current path includes a serial connection of the first and second transistors.</p>
