基准电路的分段曲率补偿电路设计

Design of a Bandgap Circuit with Sectional Curvature Compensation

提出了一种分段曲率补偿基准电路设计方法。针对一次曲率补偿基准电路只能使得产生的基准电压在一个温度点的温度系数为0,整个温度范围内温度系数的变化问题,提出分段曲率补偿基准电路设计方法,从而使所产生的基准电压在多个温度点都能表现出零温度系数,提高了基准电压的稳定性。该电路基于0.35μm CMOS工艺设计,经Cadence仿真验证,达到设计目标。

This paper presents a novel design approach for sectional curvature compensated reference circuit.The one-time curvature compensated reference circuit can only make the temperature coefficient of the reference voltage generated at a temperature 0,and in the entire temperature range the temperature coefficient is large. We propose herein a sectional curvature compensated reference circuit design method,so that the reference voltages generated at a plurality of temperature points have a zero temperature coefficient and the stability of the reference voltage can be improved. The circuit design is based on the 0. 35 μm CMOS process. Cadence simulation shows that the design goals are attained.