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Jon, No, IBIS isn't in LTspice. I think IBIS was an Intel invention that allowed them to give behavioral descriptions of their I/O pins without giving out implementation details. Anyway, I think IBIS

Bill, I think it might be hard to generalize without seeing the circuit that's causing you trouble. Usually its a matter of finding the part of the circuit that's causing difficulty and find a

Is there any support for IBIS models in LTSpice? Assuming that there isn't, are there any suggestions for what to do if a manufacturer only has an IBIS model for a part that I'd like to model?

What sort of things would one do to minimize the time required to process a simulation? Bill __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - File online,

Steve, Multiple plot windows were a precursor to the multiple pane plots that are now supported. The active window is the one most recently opened. Whether adding plot a trace to an old window will be

I just discovered (maybe everyone else already knew) that if you choose View / Simulation Data after a plot is displayed, you get a second independant plot window. If you rerun a simulation, only the

Hello, I have uploaded an enhanced version of the raw file utility program ltsputil.exe. It allows you to convert, merge, equalize and export your LTSPICE simulation raw files to other programs. Now

Works. And, as usual, you gave me something new to think about. I've not been using .dc, yet, since I'm still learning and there is plenty enough for me to fill my time with, using .tran. I still need

Jon, By and large, you can run spice3 models in LTspice. LTspice can use resistor models. But it looks like there is one syntax incompatiblity here, you'd have to put the resistor model before the

I found this model for a 1N5242B zener: .SUBCKT 1n5242b 1 9 DF 1 9 DFMOD .MODEL DFMOD D N=1.63427 IS=4.58223E-011 RS=1E-005 EG=1.11 + XTI=3 CJO=4.12979E-011 VJ=0.41419 M=0.268521 FC=0.5 + TT=1E-008

Bill, Go to Tools=>Control Panel=>Save Defaults and check "Save Subcircuit Node Votlages" --Mike __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - File online,

Is there some way to monitor nodes internal to a model? Bill __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - File online, calculators, forms, and more

Jon, Not really. Yep. --Mike __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - File online, calculators, forms, and more http://tax.yahoo.com

Is there a way, in LT SPice, to access the value field of a component in a schematic, for use in a {} formula? For example, let's say I have a component, R1, which is 47k. I know that the voltage

Thank you so much. How did you determine that? Or is this something I should just know -- to leave nothing floating? Bill --- Panama Mike <panamatex@...> wrote: <snip>

Bill, The problem was that the filment supply was floating, that is, its potential wasn't defined. The following circuit fixed this: --- .asc file --- Version 4 SHEET 1 892 692 WIRE -144 304 -144 336

OK, here they are. I have managed to clear up the warnings but still get the singular matrix error. .asc file... Version 4 SHEET 1 892 692 WIRE -16 208 176 208 WIRE 272 256 272 336 WIRE -16 288 -16

Bill, It's vaguely documented here and there in the help. It looks like the messages in your circuit come from using curly braces where parenthesis was meant. PSpice accepts with without warning, but

Thanks for the reply, Mike. Where might I find documention on the syntax so I could clean up these models and avoid the warnings? I have put the files for the circuit and model on the web. I wasn't

The "Questionable use of curly braces" just means the model is written with sloppy syntax. LTspice is pretty verbose about error messages. You can ignore it. Post the circuit with models for more