摘要
文中提出了一种利用多路负温度系数电流进行复合补偿的基准电流源的设计,结合使用分段曲率补偿和高阶非线性温度补偿,在考虑电阻温度系数的情况下,详细的分析了补偿原理。与传统的曲率补偿电路不同,该电路在整个温度范围内分两段产生不同的补偿电流,利用电流负温度系数求差的方法进行补偿,兼具分段曲率补偿与高阶非线性温度补偿。电路结构简单,功耗低,可移植性强。利用标准0.6μm UMC工艺,应用Hspice进行仿真,结果表明：在-25～125℃范围内,基准电流的温度系数达到34.2 ppm/℃.该电路可用于低功耗、高精度的系统设计中。
This paper introduced a reference current source using muhipath negative temperature coefficient to composite compensate. Considered the temperature coefficient of the resistance, the paper analyzed the compensation principle in detail with the sectional curvature compensation and higher-order nonlinear temperature compensation. The difference with the traditional circuit is that the circuit produces two different compensation current using the difference of the current negative temperature coefficient which has the advantage of the sectional curvature compensation and higher-order nonlinear temperature compensation. This circuit has the simple structure,low power and strong portability. Using the standard 0. 6 μm UMC process and simulated by Hspiee, the results show that the temperature coefficient of the reference current is 34. 2 ppm/℃ and it can be used into the low power and high accuracy system.
出处
《仪表技术与传感器》
CSCD
北大核心
2014年第11期18-20,共3页
Instrument Technique and Sensor
基金
国家自然科学基金(61106026)
教育部重点实验室基金资助项目(JY0100092702)
陕西省自然科学基金(No.2013JM5002)
关键词
电流源
负温度系数
复合补偿
求差补偿
功耗
高精度
current source
negative temperature coefficient
composite compensation
differential compensation
power consump-tion
high precision
