| 摘要 |
<p>PURPOSE:To reduce current consumption and to stably decrease and supply a power supply voltage from outside by using a transistor as a voltage decreasing means and driving the transistor by applying a reference voltage on a prescribed level to the gate of the transistor. CONSTITUTION:As a voltage decreasing means for decreasing a power supply voltage Vcc to a prescribed internal voltage Vci, a transistor Q connected between the line of the power supply voltage Vcc and the generation node N of the internal voltage Vci is used. By applying a reference voltage Vss on a prescribed level to the gate of the transistor Q, the decreased internal voltage Vci is taken out of the generation node of the internal voltage. In such a constitution, in a semiconductor device with built-in circuit for decreasing a power supply voltage from outside, the current consumption is reduced and the internally decreased voltage is stably supplied. It is desirable that the transistor Q is a depression type N channel transistor.</p> |
