LT Spice bug?

Is your model the one which has a negative voltage? If so, I had no problem switching from transient to AC.

They don't get tangled for me, but every time I switch from transient to AC or back, it wipes out the settings. Annoying and time-consuming.

Sometimes it works fine. Occasionally it likes to tangle the analysis parameter lists, or as you say wipe some of them out.

Clearly a bug.

Yes. I don't use XVII. I use IV because of all the problems. Did you keep IV?

They are both installed and both work.

XVII is generally a bit faster, so I usually use it. If I mix AC and transient analysis, I guess I should use the old one.

Good idea. I also don't like the user interface in XVII. As for speed, I am not pressed for time, so I choose the friendlier version.

Yup. I just comment out the one I'm not using.

Cheers

Phil Hobbs

I emailed Mike, and he said that's what we should do, and that there is no bug.

I disagree; the popup tabs do themselves enable and disable the two types of sim, and edit the params, but they are horribly tangled.

Yup. In 4, you can go back and forth between tabs, and it remembers what you did before, at least until you close the .asc file.

My biggest issue with 17 is that it crashes more often under WINE.

Cheers

Phil Hobbs

It would take some thinking to allow multiple .xxx and ;.xxx things on a screen, and still use the type-specific popup editors, and handle both editing and enable/disable. Actually, he's halfway there, but it's messy.

If you right-click on .ac dec 100 1K 1Meg it pops up the AC-specific edit box. If you right-click on ;.ac dec 100 1K 1Meg, it pops up the simple text editor. If that were fixed, you could have multiple sim lines and smart editing.

If you change between the edit tiles, it screws everything up.

Sometimes I get ;.tran and sometimes I get ;tran

It just created .tran dec 100 1K 1Meg for me.

That's not a bug?

I hate the little edit boxes for stuff like .step param. I generally start each text block with a comment so that when I click on it the whole text comes up (as in 4) and not the stupid command-specific edit box.

Once you have a couple of each kind of .tran, .ac, and so on in the text box, it's easy to go back and forth, and as a bonus it remembers what you did before.

Cheers

Phil Hobbs

Don't you insult the cute little edit boxes! I haven't memorized all the parameter lists for all the various commands, and the boxes are great.

The specific edit boxes could do all that, but don't.

Use a real simulator instead of a kludge

Of course it won?t be free ?

I very often have one text box like

.param Cf 0.5p \n .step dec param Cf 0.1p 10p 2

(I think I got that right.) When I find the step I like, I comment out the .step param and adjust the .param line. With the normal text box editor, that's easy, but it's a pain with the "cute little edit boxes".

Cheers

Phil Hobbs

I'd gladly pay for LT Spice. It's a minor bonus that I don't have to.

Support is great: I email Mike directly.