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详细分析了基本低压带隙基准电压源电路实现二阶温度曲率补偿成立的条件.采用0.35 μm标准CMOS工艺库,在-50 ℃～+120 ℃温度范围内,通过选择合适的电阻比例及MOSFET的沟道调制效应系数λ,获得了任意输出电压值的二阶曲率补偿基准电压源,且具有较低的温度系数.“,”Specific requirements for 2nd-order temperature curvature compensation were analyzed based on low voltage bandgap reference (BGR) circuit. Results from simulation based on standard CMOS 0.35 μm technology showed that, by choosing proper resistance ratio and channel-length modulation coefficient λ for MOSFET, the proposed universal precise curvature compensated BGR could develop arbitrary value of output voltage reference and achieve low temperature coefficient over a wide temperature range from -50 ℃ to +120 ℃.