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From: jws@cica22.mlb.semi.harris.com (James W. Swonger)
Newsgroups: sci.electronics
Subject: Re: Discrete transistor models (SPICE) wanted
Message-ID: <1991May2.201620.11396@mlb.semi.harris.com>
Date: 2 May 91 20:16:20 GMT
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 Perhaps I should be clearer about what I need and what I need it for. I
have to model a circuit made up of discretes (a hybrid, actually) and
the transient results will be used to set design goals for my monolithic
implementation, since the actual circuit is not in my posession. The edge
rates we have been told are on the order of 2nS. I need a model for the
2N4209 which includes accurate CJC, CJE, TR and TF terms. Naturally I
would prefer one which represents a normal device - not one with the
datasheet minimum or maximum values plugged in. In addition, other 
parameters like VA, C2 and IK become important when you're running a
device over the entire range rather than just a single point near beta peak.

 Making a useful general-purpose model requires a lot of work. I'm hoping 
there exists a library of models based on thorough characterization.
I'd love to get a complete set and I'd be ecstatic to find temperature
dependent models.

Of course I'll take what I can get and be thankful for it.