Patent ID: 8314650

Claim:
A reference voltage generating circuit including a constant current circuit which comprises: a first resistive element, wherein a first end of the first resistive element is connected to a supply voltage terminal, and a second end of the first resistive element is connected to a collector of a bipolar transistor; a second resistive element which is connected in series between a base of the bipolar transistor and a constant potential point; a first MOS transistor, wherein a gate of the first MOS transistor is connected to a node between the first resistive element and the collector of the bipolar transistor, and a source of the first MOS transistor is connected to the base of the bipolar transistor; a second MOS transistor connected between a drain of the first MOS transistor and the supply voltage terminal; and a third MOS transistor forming a current mirror in conjunction with the second MOS transistor, wherein a constant current generated by the constant current circuit or a current proportional to the generated constant current is converted to a voltage as a reference voltage.