基于电阻补偿技术的低温漂电流源的设计

Design of Current Source Depending on the Technology of Resistor Compensation

介绍了一种采用补偿电阻的方法获得低温漂电流源的设计思想。基于Chartered0 .2 5 μm工艺电阻模型的分析 ,提出采用两种电阻相互补偿的方法 ,获得具有低温度系数的电阻值 ,从而优化了输出电流的温度特性。仿真结果表明 ,输出电流的温度系数为 33× 10 - 6 /℃。针对非理想参考电压的情况 ,给出了提高输出电流稳定性的分析以及解决方法。

A new way to get current sources of low drift with temperature by compensated resistances is concerned. Depending on the analysis of the resistance models, using the way of two kinds of resistances compensation to get resistance of low temperature coefficient, then optimize the temperature characteristic of the output current. We can know from the simulated results that the temperature coefficient of the output current is 33 ppm/℃. The way to optimize the stability of the output when the voltage reference is not ideal is also mentioned last at this paper.