减小线性稳压电源输出端电压纹波的措施

A method to minimize the ripple of linear stabilized power supply

线性稳压电源的一个重要性能参数是纹波。以WZ-12型线性稳压电源为例,分析并查找出了其中一类在输出端无法滤除纹波的产生原因,并对相关电路走线采取措施,大幅降低了该纹波。最后总结了稳压电源和相关精密电子线路中为避免这类纹波所需要注意的问题。

The ripple is one of the most important parameters of a voltage-stabilized power supply.Here,using a classic linear voltage-stabilized power supply(WZ-12)as an example,we analyze a mechanism of the ripple voltage,which cannot be eliminated by filtering capacitors at the output.The ripple voltage is effectively suppressed after adjustment on the circuit board.For reducing ripple voltage,general guidance on the layout of the circuit board of power supplies and precision electronic instruments is summarized at the end.