用在高精度A／D转换器中的CMOS电压参考源

One Kind of CMOS Voltage Reference Using in High Precision A/D

文章介绍了一种用在高精度A／D转换器中的CMOS电压参考源,依靠PMOS管阈值电压差来产生电流,在外接下拉电阻上产生电压参考源。该种结构的电路温度系数基本在10×10-6／℃左右, 所以这种参考电压可以适用于高精度A／D转换器中。

In this paper, it introduces one kind of CMOS voltage reference source in high precision A/D converter, which produces current depending on difference of PMOS threshold voltage, and gives birth to voltage reference source on external get-down resistance.It＇s temperature coefficient is about 10×10^-6/℃, so it can be used of A/D.