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AMC1200芯片进行采样电压，输入前端用电阻分压，测试时发现给芯片供电，无输入电压时仍有纹波；去掉芯片供电消失；经检查供电稳定。
你好谢谢回答，有输入电压的情况下输出波形也是类似，有较大的噪声干扰
亲；建议先查下运放电源线噪音。
噪音无非三要素，源/途径/受体。找到源就问题不大了。
