Bandgap Reference Compensated by Second Degree Curvature
Haisong Li · Modern Electronics Technique · 2008
Based on the principle of second degree curvature compensation,a novel bandgap reference circuit compensated by second degree curvature with high accuracy is proposed in this paper.A second degree compensation term is produced to corrected the curve of conventional CMOS bandgap reference,so that a small temperature coefficient is achieved.The circuit is fabricated with 0.6μm CMOS process.The reference is simulated by Spectre.It has average temperature coefficient of 4.47 ppm/℃ between-50~125 ℃.This reference can be used in all kinds of analog integrated circuits and mixed-signal circuit.