PSpice Output File Device

Is there an output device that will allow a single circuit parameter to be written to a file?

I know that VPWL_FILE can be used to read an ASCII file of two columns, time and voltage.

Reply to
Bob Penoyer
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The ".PRINT" statement can print-to-file most anything.

What did you have in mind? Your problem statement is somewhat muddy ;-)

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Reply to
Jim Thompson

I use Capture. How do I invoke the .PRINT statement?

I have a fairly large circuit that is having convergence problems. The various parts ran all right when they were in their own projects. Now the presence of a particular amplifier circuit has somehow affected convergence in other parts of the overall circuit.

As one possible approach to this apparent dilema, I have considered running the various sections separately so that one section's output can be saved to a file and another section can read that file. That way I hope to limit PSpice's computational load and maybe avoid the convergence problem.

Reply to
Bob Penoyer

Poor bastard ;-)

In PSpice Schematics it's just Get Part "Print1" or "PrintData", but I couldn't find it in Capture.

You can also capture a PWL file directly from Probe by copying and pasting into a text file, or Excel for that matter.

Irrespective of what the Cadence types will tell you, set the following:

ITL1=1500, ITL2=2000, ITL4=1000

Also set:

VNTOL=10uV ABSTOL=10pA RELTOL=0.01

Check the STEPGMIN box.

Might also try checking the SKIPBP box.

Sometimes that works. My general experience is that PSpice failing to converge means you have a nearly unstable system.

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Reply to
Jim Thompson

Another approach to take is too look for daft signals. Large voltages or currents etc. Then add some circuit parasitics to reduce these. Convergence problems can be due to an unrealistic circuit, too simple models. Sometimes just adding loads to batteries (i.e. increasing standing current) can be enough to fix things.

--
Malcolm

 Malcolm Reeves BSc CEng MIEE MIRSE, Full Circuit Ltd, Chippenham, UK
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Reply to
Malcolm Reeves

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