Design of a bandgap reference with low temperature drift and high power supply rejection ratio

Abstract

Based on bandgap voltage reference structure in the traditional current mode and the first-order compensation of the voltage reference output characteristics, introducing a subsection compensation circuit,which significantly improve the accuracy of voltage reference in a wide temperature range(-50~150 ℃). At the same time, the circuit is simply improved, the output voltage to obtain a high power supply rejection ratio .Using TSMC 65 nm CMOS process simulation model, in the power supply voltage of 1.5 V, power supply rejection ratio is -83.6 dB, temperature coefficient is 2.27 ppm/℃.

Keywords

• bandgap voltage reference
• low temperature drift
• high power supply rejection ratio