noise filtering method for a mainboard memory power supply circuit

The invention discloses a noise filtering method for a mainboard memory power supply circuit, and the mainboard memory power supply circuit comprises a decoupling capacitor and comprises the followingsteps: (1) testing an interference spectrogram; (2) testing a full spectrum chart; (3) finding out an interference frequency point or segment; (4) testing the magnitude of the interference level; (5)carrying out interference elimination. According to the noise filtering method for the mainboard memory power supply circuit, the interference source of a mainboard power supply can be accurately andefficiently measured and analyzed, and the interference is effectively eliminated in a targeted manner; The method can also be used for measuring and debugging power supply interference of other mainboards, and provides capacitance type selection and layout reference values for subsequent mainboard power supply design and noise filtering, especially for a memory part. 本发明公开了一种主板内存电源电路的噪声滤波方法，所述主板内存电源电路中含有去耦电容，包括如下步骤：（1）测试干