用示波器一端接电源地,一端检测在R12的地线上有很大的杂波,峰峰值电压有7-8V,平均值35mv.杂波强烈.测电源输入端电容地线200mv,R12地线上该电压太大了,,波形很杂乱并尖锐,影响了IC正常工作.IC的三端稳压器78L33也有此类杂波,给IC提供震荡的RC震荡器三角波上也有部分杂波,请教各位高手知道是什么造成的吗?有什么好的解决办法吗?谢谢啊!..
输入电压15V,充电电流1.7A,频率=180KHZ
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