一种采用二次曲率补偿的带隙基准源

Bandgap Reference Compensated by Second Degree Curvature

基于二次曲率补偿的基本原理,提出一种高精度的采用二次曲率补偿的新型带隙基准源电路,产生二次温度补偿量对传统的带隙基准源进行校正,获得更小的温度系数。该电路采用0.6μm的CMOS工艺实现。经过Spectre仿真,结果表明在-50^+125℃的温度范围内,基准电压源的平均温度系数为4.47 ppm/℃。该基准源可以被应用于各种高精度的模拟和混合集成电路。

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.