摘要
基于charter 0.35μm标准CMOS工艺,设计了一种带自启动电路的高精度、低温漂、低功耗带隙基准电压源。电路在传统带隙基准源的基础上进行改进,利用不同材料电阻温漂系数的比值实现二阶补偿。仿真结果表明,在-40-120℃范围内,输出电压达到1.148 V,平均温漂系数为4.9ppm/℃,功耗仅为57μW。
A high precision, low temperature coefficient and low power bandgap reference with a start - up circuit is designed on the charter 0.35μn CMOS technology. The circuit is developed based on the conventional bandgap reference, and achieved second - order compensation using a temperature dependent resistor ratio generated by the different kinds of resistors. The simulation results show that the circuit delivers an output voltage of 1. 149 V and achieves a temperature coefficient of 4.9 ppm/℃ over the range from - 40 ℃ to 120 ℃. The power consumption of the circuit is only 57uW.
基金
国家自然科学基金资助项目(60706002)
关键词
自启动电路
带隙基准电压源
二阶补偿
start - up circuit
bandgap reference
second - order compensation
