Design of a Bandgap Reference with 1.5V Supply Voltage

Based on analysis of the conventional bandgap reference circuit, a low operating voltage bandgap reference circuit using current-mode architecture, is proposed in this paper, which can output voltage as low as 200mV. Meanwhile,the operation amplifier with the negative feedback network and the bias independent on operating voltage, are used to improve the precision of the circuit. Implemented by 0.35μm CMOS technology, this circuit can work under the operating voltage of 1.1V to 1.5V. The Hspice simulation results show that the effective temperature coefficient is 14ppm/℃ under the operating voltage of 1.5V.