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Installing and using LTspice IV (now including LTXVII). From beginner to advanced.
Installing and using LTspice IV (now including LTXVII). From beginner to advanced.
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Old 25th November 2017, 06:53 PM   #861
keantoken is offline keantoken  United States
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Subcircuit not found. That means the symbol is there on the schematic, but LTspice can't find the .sub file somewhere that contains the actual electrical model that goes with the symbol. You need to put the .sub file in the same folder as the schematic and use the .inc command on the schematic to tell the simulator to use it.
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Old 26th November 2017, 02:39 AM   #862
george_ct is offline george_ct  Romania
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@Mooly

The link for WIKI from the first page (first message) does't work anymore. The link that must be inserted is this one:
http://www.diyaudio.com/wiki/Special...s?userid=52623

Also the link from this phrase (from the first page, first message) does't work anymore:
A/ Using LTSpice simulation command for a DC sweep for resistors. For a worked example see post # 560 ........ (submitted by pr)
The correct link is this one: http://www.diyaudio.com/forums/softw...ml#post4573413

And also the link from this phrase (from the first page, first message) does't work anymore:
B/ Functional LF198/LF298/LF398 Sample and Hold, post #754 .......... (submitted by FdW)
The correct link is this one: http://www.diyaudio.com/forums/softw...ml#post4988859

Last edited by george_ct; 26th November 2017 at 02:45 AM.
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Old 26th November 2017, 08:18 AM   #863
Mooly is offline Mooly  United Kingdom
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Installing and using LTspice IV (now including LTXVII). From beginner to advanced.
Thanks for pointing these out George Links have become a bit of a major issue lately with recent forum changes. Of the original links you mention, the Wiki doesn't work for me but the other two do ! and for your replacements the Wiki works and the other don't. Those last two return me to post #861 just above these. Arghhh.

I'll see what we can sort out (jazbo is good on these, hint hint)
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Old 26th November 2017, 08:55 AM   #864
Mooly is offline Mooly  United Kingdom
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Installing and using LTspice IV (now including LTXVII). From beginner to advanced.
jazbo has worked his magic on these links.

Thanks
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Old 4th December 2017, 06:48 AM   #865
Straight Tracker is offline Straight Tracker  United States
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Default Thank you for your precious time

Hello Mooly,

A kind gentleman on the Internet provided me with a servo circuit for my tangentially tracking tone arm. The circuit works perfectly, but I don't understand how it works. A few days ago I downloaded LTspice and I would like to know if I can/may download your entire thread so that I can take it to my work station and go through your tutorials in the peace and quiet of my shop.

Sincerely,

Ralf
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Old 4th December 2017, 07:06 AM   #866
jazbo8 is offline jazbo8
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Installing and using LTspice IV (now including LTXVII). From beginner to advanced.
Please see: Can a (long) thread be downloaded?
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Old 5th December 2017, 11:26 AM   #867
martyh is offline martyh  United States
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Is setting up the dc supply as ac with an offset a valid way to check PSRR? I.E. I set up a 1 volt peak 100 Hz ac source with a 350V dc offset to power a tube circuit. Ran the simulation with a 0v ac input and looked at the output.
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Old 5th December 2017, 11:58 AM   #868
Mooly is offline Mooly  United Kingdom
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Installing and using LTspice IV (now including LTXVII). From beginner to advanced.
For checking PSRR you really need to either simulate an appropriate shaped ripple voltage or you can even use an AC source feeding a rectifier.

Here are typical settings to generate a ripply rail.
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Old 5th December 2017, 11:18 PM   #869
martyh is offline martyh  United States
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Thanks again Mooly
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Old 21st December 2017, 12:08 PM   #870
kees52 is online now kees52  Netherlands
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some question for the LTspice specialists here.

Why I get such a bad drive signal for the lower fet?, it looks not very good, I get the deadtime not right that way

Maybe @analog do now because he did make them.

Thanks

kees
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