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Re: LT Spice Tutorial
Raymond.Rogers_#1   9/7/2013 11:17:18 AM
Doctek:  Your not wrong but how much is it worth to have information in an organized familiar form; readily available?

If your retired, student, or short of money $50 is not worth it because you have no way to get a ROI.

But if you are being paid $50/hour then it doesn't take long to recover a $50 investment either as a contractor or employe.

You have to remember that details fade if you don't use them.  I have had very experienced and high paid engineers ask me technical questions about particular spice models.  No shame in that since all memory is fallable; either due to time, distraction, or (when you are older) displacement in the memory space :)

How much is the saved time worth?

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Knowing more on how to get "true" FFT
Sanjib.A   9/7/2013 3:35:34 AM
I have an unexplored area in LTSpice, I have seen a significant different between the FFT responses (for the waveforms generated for the same circuit parameters) for different settings of "Stop Time" and "Minimum Time step" in the "Edit Simulation Command" window. I just briefly went through the table of contents of the book (thanks for the link) and see that there is a chapter10 and sections 10.11.1, 2, 3 describes this. But rest of the book is not that interesting to me as it looks more like a manual to me. Does anyone have any article explaining what should be the optimum settings to get a more real FFT picture? Also, is there not an e-book version released? 

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Re: LT Spice Tutorial
zeeglen   9/6/2013 11:57:02 AM
Good info, can use good sources of LTspice tutorials. A word of caution on the yahoo group, while most are helpful, one of the members is known to be very aggressively disparaging towards newbies.

Kenneth Wyatt
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Re: LT Spice Tutorial
Kenneth Wyatt   9/6/2013 11:44:39 AM
You're right, of course. But some will find it handy to have everything needed in one place.

Here are a few links to tutorials and other LTspice references:

The Yahoo LTspice group has nearly 45,000 members and is very active - You'll need a Yahoo email address and will have to go through the "joining" process.

A good reference and tutorial site is the LTwiki site -

Linear Technology applications engineer, Steve Knudtsen, has a very nice tutorial slide set given to the Denver Power Electronics chapter of the IEEE in 2009 -

Dr. Tony Richardson, of the University of Evansville, has a collection of tutorials for LTspice -


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LT Spice Tutorial
Doctek   9/5/2013 8:35:11 PM
Google for some excellent and free tutorial material on LTSpice. 

I'm sure the Wurth book is great, but $50 is a lot for the hobbyist or student when there are many excellent treatments available free.

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