Ah thank you, I have read that article before quite a long time ago and I have been searching for it without finding it since I could not remember any specifics to it.
It does actually help quite a bit in other areas.
It is in concept the same as my circuit, I do have a linear regulator stage controlled by a microcontroller.
But the things I am concerned about regarding input filter circuit is:
Not spreading any high frequency content to other equipment connected to the mains.
Keep the input from oscillating.
And ehmm, something to do with EMC... I am reading to much to wide a topics so I can't remember but id had something to do with EMC
Can you explain what pre-load is?
I have read that switchers may have problems during light load conditions, might it mean the minimum load required to keep the regulator/controller stable...
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I have come to understand that all the "good stuff" is found in real books, though my ADD does make the task of reading books something almost meant to torment me but I will choose a suitable book and try really hard to keep at it.
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Am I correct in thinking that I could achieve a physically smaller and perhaps more cost effective design if using more than one stage in a filter?
Through the use of smaller values in each stage in comparison to larger values in a single stage configuration.