This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS7A4700 LDO使用疑惑



         模拟电路采用TPS7A4700这颗LDO供电,发现它本身非但对12Mhz左右的噪声没有衰减作用反而有放大的效果.噪声的出现周期为30Khz,

噪声的本身频率为12Mhz,在TPS7A4700输入端的噪声伏值为20mv Vpp,不过在5V输入端的噪声升为30多mv Vpp.TPS7A4700它的输入电压为12V,

输出电压为5V,测量时为空载.滤波电容输入端和输出端都为50UF.这个是什么问题?