Study Notes | How to reduce the ripple noise voltage

Recently, I need to design a filter to deal with the problem of a ripple voltage caused by a SMPS(Switch Mode Power Supply). But it need so much tricky to solve this problem. So here is a guideline to make it more easily to slove this problem.

1. How to measure the ripple voltage ?

The methods to measure the ripple voltage are diverse, but there is a standard which is developed by a Japan Power Module Manufacturer (TDK Power). It provide a standard procedure called JEITA-RC9131A to measure a power supply’s output ripple voltage. Here is the detailed method.

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