关键词: 分段曲率补偿, 基准电路, 零温度系数, 稳定性

Abstract:

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.

Key words:  sectional curvature compensation;bandgap circuit;zero temperature coefficient;stability