Large signal PSpice transistor models

o pere o · 2012-11-10T21:53:08+00:00

To make a long story short, I ended up simulating an emitter follower with Qucs. This simulator has some transistor models embedded, but you are able to insert PSpice models and subcircuits if you need more. When you increase input signal level up to the point where the output should clip at zero, one transistor model clips correctly (BFP405, from Qucs) but others not (BFR93a, 2N2222A). The BFR93a model is a PSpice model from the NXP site and I have tried several 2N2222a models (one from Qucs itself, one PSpice model from Zetex and another PSpice model from somewhere): none of these clips at zero although it does at VCC=3.3. Tried the same circuit in LTSpice with the same result. Am I the only one experiencing this? Has anyone got better large-signal models -especially for the BFR93a? Pere

Nov 10, 2012 43 Replies

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krw 13 years ago

I don't know what your problem is (understatement) but I didn't pay anything for mine.

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Tim Williams 13 years ago

Did you look at the links I posted?? We were talking about the three-digit 2N222, not the 2N2222.

Do SPICE models even exist for any pure-Ge (not SiGe) transistors???

Tim

Deep Friar: a very philosophical monk. Website: http://seventransistorlabs.com

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legg 13 years ago

Some info on the Mextram model.

formatting link

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Jim Thompson 13 years ago

[snip]

My suspicions are correct :-) ...Jim Thompson

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