在传统低压带隙基准的基础上，通过设计与热力学温度成正比的电流（IPTAT）及与热力学温度呈互补关系的电流（ICTAT），实现节点电流相减，从而产生分段线性电流作为基准源的曲率校正分量，设计了一个性能更佳的曲率校正带隙基准。电路采用低压运放及低压PTAT电流产生模块，工作电压低。Cadence仿真结果显示，在-40~125℃温度范围内，平均温度系数大约3×10-6℃-1，最低工作电压在1V左右，可用于低电源电压、高精度的集成芯片。%Based on the traditional low supply voltage bandgap reference, by designing current proportional to absolute temperature(IPTAT)and current complementary to absolute temperature(ICTAT)which are subtracted from one another, a piecewise linear current is achieved and used as the curvature correction component. Thus, a better performance curvature corrected bandgap reference is proposed. The circuits use low-voltage ampliifer and low-voltage IPTAT generator, so the operation voltage is low. Simulation results with Cadence indicate that the bandgap reference has an average temperature coefifcient of 3×10-6℃ -1 within a temperature range between-40~125℃centigrade, and the power supply is as low as 1 V, the circuits can be used in low power supply and high-precision SOCs.
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