An inverse temperature characteristic generating circuit decreases an output voltage V.sub.out by a voltage V.sub.GS, and supplies the resultant voltage as a voltage VA to a temperature characteristic generating circuit. The temperature characteristic generating circuit includes a differential amplification circuit that receives a terminal voltage V.sub.AP between resistances R.sub.22 and R.sub.23 and an emitter voltage V.sub.AM of a bipolar transistor T.sub.21, and outputs a control signal VC. When the terminal voltages V.sub.AP and V.sub.AM are equal to each other, an operation of a circuit is stable. The temperature characteristic of the voltage VA during the stable operation, and the temperature characteristic of the voltage V.sub.GS are inverse to each other and therefore cancel each other, so that the constant voltage V.sub.out independent of temperature is output. In addition, the output terminal is not connected via a resistance to a ground, so that low current consumption can be easily achieved.