Patent ID: 8653806

Claim:
The semiconductor device comprising: a first transistor coupled between a first power supply line and a first node and including a control electrode coupled to a first common node; a second transistor coupled between the first power supply line and a second node and including a control electrode coupled to the first common node; a first diode coupled between the first node and a second power supply line; a second diode and a first resistor coupled in series between the second node and the second power supply line; a third transistor coupled between the first power supply line and a reference voltage output terminal and including a control electrode coupled to the first common node; a differential amplifying circuit that includes an output terminal coupled to the first common node, a first input terminal coupled to the first node, and a second input terminal coupled to the second node; a control circuit including an output node coupled to the first node and including an input node coupled to the reference voltage output terminal or the second node; wherein the control circuit includes a fourth transistor coupled between the first node and the first power supply line, the fourth transistor including a control electrode coupled to a third node, a fifth transistor coupled between the third node and the first power supply line, a sixth transistor coupled between the first power supply line and a fourth node and including a control electrode coupled to a control electrode of the fifth transistor and the fourth node, and a seventh transistor coupled between the fourth node and a fifth node and including a control electrode coupled to the reference voltage output terminal or the second node.