【摘要】 提出了一种利用分支电流的正负温度系数进行温度补偿的新型设计方法。在传统的电流温度补偿的基础上,通过增加一条分支电流对温度特性进行曲率补偿(二阶温度补偿),并且详细地分析了补偿原理。使用XFAB公司的0.6μm CMOS工艺模型进行仿真模拟,得到了较好的仿真结果:在-40℃～135℃温度范围内,其温度系数达到39.8ppm/℃。更多还原

【Abstract】 A super performance CMOS current reference circuit with temperature compensation is presented, which uses curvature temperature compensation with three branch currents having positive and negative temperature for fine adjustment. Comparing to the typical temperature compensation, the third branch current can be added to optimize the temperature features by curvature compensation. The principle of compensation is detailedly produced and 0.6μm CMOS process are used for simulation. The results are shown that the temperature coefficient of the current reference can reach 39.8 ppm/℃ with in temperature range from-40℃ to 135℃.更多还原