Fundamentals of PCB Design

8/16/2010 11:28 AM EDT

It`s very usefull !

Thank you

8/16/2010 4:48 PM EDT

WOW! no need for reading 100 books. that was very precise and effective

8/16/2010 9:39 PM EDT

Great course! This course give very detail explanation on how important a good PCB layout can affect the product performance and reliability. PCB layout usually draws the least attention from engineers as they may think this to be a low level workmanship. However, a high performance, especially with nowadays high speed mixed signal design, really is very demanding on layout. I hope people get good enough attention on doing a good layout. It really helps companies to save lots of money in re-spinning the board.

8/17/2010 7:08 AM EDT

This is a very good course for pcb design. It is not very easy for first time learner to grab all the concepts of PCB design but this course is very well organized and gives very good insight towards the specifications of PCB.
I have just forwarded it to all my electronics engineering students.
Great Course.

8/26/2010 12:45 AM EDT

Very good. Short and concise. I liked the cross talk and EMI part

8/26/2010 4:52 AM EDT

Dear Dr. Johnson,

is available a document that transcribes the voice of the video? My comprehension of English is low and I do better in reading rather than listening.

Thank you.

8/28/2010 2:26 PM EDT

It's good, but still missing many useful and practical techniques to improve your chance of passing FCC and CE for the 1st time.

Anyway, tremendous effort from Howard. Thank you!

8/30/2010 4:30 AM EDT

I watched this presentation last week - I wanted to come back to say that it was one of the finest concise technical presentations I've seen (and I've seen a few!). You delivered the main and most interesting aspects, your supporting slides were clear and judiciously selected, and your delivery was pretty much perfect, managing to keep a sense of humour while emphasising key points. Excellent, well done.

8/31/2010 1:02 AM EDT

It is useful information. I tried concept of reducing coupling between rf lines by reducing height so less em waves couple but it worsen my performance. I believe reducing height add more capacitance with lesser isolation. Any idea

9/7/2010 11:26 AM EDT

Dear Bhola_#1,

Regarding your pcb traces, reducing the height above the nearest solid plane layer has two effects: it radically reduces crosstalk, and at the same time it reduces the characteristic impedance of the traces (you know, whether they are 50 ohms or 45 ohms or even lower). If the characteristic impedance becomes too low your drivers can experience difficulty sourcing enough current to properly drive the lines. Changing the impedance also affecs the performance of any terminations present in the system. The solution to these difficulties is simple: shrink the trace width in proportion to the decrease in height (i.e., 10% reduction in height is commensurate with about a 10% reduction in width). By maintaining the same height/width ratio, you do not (much) affect the trace impedance, yet you gain all the crosstalk benefits. Use a 2-D field solver (or ask your board vendor) to find the exact trace width necessary to work with your new height.

9/7/2010 11:26 AM EDT

Dear Dr.JOhnson,

I sincerely appreciate this presentation that you have put up . The questions that you posed related to the Board planner with the Specialist at Intel were very insightful .

Thanks & Regards,

Debajit

10/7/2010 10:29 PM EDT

A very good presentation indeed but I guess need to be divided into two parts. Like from 21 onwards can be put into new presentation. I like the BGA part, details on via. I would like to know more on challenges faced with BGA designs?

10/30/2010 2:40 AM EDT

Thanks Howard
I understand this point. I adjusted the trace width to make sure RF traces to be around 50 ohm depending on its new height. I also think there is something else on PCB causing issue. On my bias line, I have high impedance line length between choke n bypass cap. It may be possible it acting as antenna and radiating towards RF traces causing coupling..some kind of DC-RF coupling. One question, reducing height will increase the capacitance and affect the performance even width is adjusted to make it 50 ohm line.

10/30/2010 2:44 AM EDT

I did find coupling issue between traces. terminated RF end with 50 ohm n measure insertion loss...seeing dip over certain freq range. The only solution I think of is have maximum spacing between two traces depending on board space. But after seeing your presentation, I thought of trying combo ie something reducing height ( that actually make sense too..less height less em coupling)and having space bet traces, but seems like it just like spacing.

11/25/2010 1:48 PM EST

Great course! A broad high-level overview that touched on all the important topics. Thanks!

12/10/2010 8:12 PM EST

AWESOME presentation! Extremely usefull information!

Greetings from Argentina

12/28/2010 6:46 AM EST

Dr.Johnson,

It is the best presentation about PCB design I have ever seen. Very useful, mainly for a rookie like me.

Best Regards.

3/26/2011 12:34 AM EDT

Dr.Johnson

Very Useful Presentation for beginners who are aspiring to become digital design engineer.Can you suggest me any PCB design tools to start with?

Greetings from Singapore

Regards,
Seyed Mohideen

4/29/2011 12:12 AM EDT

Such a wonderful course for revising all the important key points in PCB design. You made it so easy to understand. Please make more courses on signal integrity analysis.

6/4/2011 10:41 AM EDT

super LIKE Doc

6/16/2011 6:19 AM EDT

Amazing!

7/6/2011 12:52 AM EDT

I learned a lot from this presentation. Cheers from the Philippines!

7/6/2011 9:38 AM EDT

hello howard

I found this presentation very very useful and extremely good and it seems to me the overall fruit which has the flavour of many books in it.


But Sir I want to keep your this beautiful and amazing work for my future refrence, So can you tell me that how can I download it.

Thank you

9/15/2011 10:55 AM EDT

Dear Johnson,
I have to design a PCB for my final year project. It might be a 2 or 3 layer pcb. Can you please tell me which software tool(s) would be best for the purpose and easy to use.
Regards,
Hanan

2/7/2012 8:57 PM EST

Well, you know how you moved that memory DIMM 90deg, what did it do to the signal routing? Where is the SI on that aspect? That would be quite usefull.

2/12/2012 4:07 AM EST

I would like to know what are chances to short or sum two different voltage levels. say each island of voltages are near by