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.
Study Notes | Cadence Allegro SPB
After nearly 3.5 years working in Creative, I finaly decided to change a job with more challenge which I never encoutered.
In a new company, I decide to use OrCAD + Allegro to finish all projects. In next 3~4 weeks, I will write some notes about how to use Allegro to draw a PCB Board. Orcad is somebit of easy job for me because of that I've used a lot with the pspice simulation jobs.
Topic which covers: (Updated 2010-03-29)
1. How to draw Component’s footprint in Allegro
2. How to link a Component’s footprint with a schematic's symbol
3. How to Draw a board outline
4. How to Import a netlist from Capture
Study Notes | High Speed PCB Layout Guideline
As you all know, I am a heavy search-depent person which got almost information from Google. So in my last year, I give a present a KeyNote to my colleagues on the Topic of "How to Google Everything".
And as an electronics engineer myself, I also have collected many design rule from Internet. Most of them coming from Semiconductor Corp (TI, NSC, LT, Onsemi, ... ). So here I gave my version of PCB Design GuideLine.
It will be the first one of my series Guide Book called - TGuide Book Series.
So Here is the 1st one. High Speed PCB Layout Guide Book
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