BANDGAP CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a bandgap circuit which can be operated with a low supply voltage and has a high power supply rejection ratio (PSRR), low noise, and less variance. SOLUTION: The bandgap circuit is constituted of: an amplifier 31 for feedback control; PMOS transistors 32 and 35; two bipolar transistors 33 and 34 having different emitter areas; resistors R1, R2, and Rpbetween the base and the emitter of the bipolar transistor 33 having a smaller emitter area; a resistor Rpbetween the base and the collector of the bipolar transistor 34 having a larger emitter area; and resistors R1and R2between the base and the emitter of the bipolar transistor. COPYRIGHT: (C)2006,JPO&NCIPI