设计了一种利用三极管的反向饱和电流来实现高阶曲率补偿的、具有极低温度系数的BiCMOS带隙基准电压源.通过增加由一个三极管和若干电阻形成的高阶曲率补偿电路来获得更小的温度漂移.电路采用0.8μm BiCMOS工艺实现,在5 V工作电压条件下的仿真结果表明.在-20+120℃的温度范围内输出电压的温度系数为5 ppm/℃,与一阶补偿相比温度系数减小了90%.该电路结构简单实用,功耗较小.
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