一种高精度基准电压源的设计制作

The design and make of one High-precision benchmark voltage power supply

对能引起电源的时间漂移及电源噪声的诸多因素进行了分析,采用了AD581集成三端器件和uA741运算放大器设计了恒温控制电路,并制作了恒温槽,设计制作高精度基准电压源。该基准源被应用于HHSV-1型高压高稳定性直流电源的基准电压,极大的提高了该直流电源的精度,使其高压高稳定性直流电源在输出电压为10000V,负载电流在2 mA的工作情况下,输出电压和电流的稳定度、时漂、温漂均达到10-6量级,波纹系数达10-7。该电压源可以用作粒子加速器,质谱计,CT机等高精度医疗仪器的基准源。

Constant-temperature control circuit, by integration three-end apparatus-AD581-and operation amplifier uA741, is designed to have the constant-temperature cannulation and then make a high precision benchmark voltage power after analyzing the time excursion and noise of power. It could much improve the precision of the DC power that the benchmark power has been used in the high- voltage and high-precision DC power HHSV- 1. And the benchmark power also could keep the output voltage of the high-voltage and high-precision DC power beening 10000V, the Stabilization level, time excursion and temperature excursion beening 10-6 by the load current is 2mA and the ripple coefficient beening 10-7.