jws@cica4.mlb.semi.harris.com (James W. Swonger) (05/02/91)
I need to snarf some SPICE models for discrete transistors. Anybody know
of any ftp sources for manufacturers like Moto and TI?
Failing that, anyone want to e-mail me a model for the 2N4209?
Thanks...erickson@crevas.enet.dec.com (John Erickson) (05/02/91)
In article <1991May1.192818.21120@mlb.semi.harris.com>, jws@cica4.mlb.semi.harris.com (James W. Swonger) writes... > > I need to snarf some SPICE models for discrete transistors. Anybody know >of any ftp sources for manufacturers like Moto and TI? > I can never figure out why folks ask questions like this. Spice knows how to model transistors, all you have to do is give it the parameters from the Data Book! I don't get why anyone would want to ftp, like, one or two lines of Spice source! > Failing that, anyone want to e-mail me a model for the 2N4209? The 2N4209 is a PNP switching transistor, TO-18 package Vceo: 15V Vcbo: 15V hFE: 50-120 @Ic=10mA/Vce=0.3V Vce(sat): 0.18V @ Ic=10mA/Ib=1.0mA Just plug these values in to your standard SPICE model! *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* * John Erickson * crevas::erickson * * Advanced Test Development * erickson@crevas.dec.com * * Digital Equipment Corp. * ...!decwrl!crevas.dec.com!erickson * * Acton, MA 01720 * erickson%crevas.dec@decwrl.dec.com * *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
FC138001@ysub.ysu.edu (Phil Munro) (05/02/91)
>> James W. Swonger writes... >> I need to snarf some SPICE models for discrete transistors. Anybody know >>of any ftp sources for manufacturers like Moto and TI? >> > John Erickson replys: > I can never figure out why folks ask questions like this. Spice > knows how to model transistors, all you have to do is give it > the parameters from the Data Book! I don't get why anyone would > want to ftp, like, one or two lines of Spice source! > >> Failing that, anyone want to e-mail me a model for the 2N4209? > > The 2N4209 is a PNP switching transistor, TO-18 package > > Vceo: 15V > Vcbo: 15V > hFE: 50-120 @Ic=10mA/Vce=0.3V > Vce(sat): 0.18V @ Ic=10mA/Ib=1.0mA > > Just plug these values in to your standard SPICE model! > The spec sheet for the 2N4209 will include *MUCH* more information than that contained just above!! BJT modeling has come far beyond just plugging in a few parameters. For example, look at some of the readily available (e.g., evaluation versions of PSpice) BJT models to see the multitude of parameters which one can include to sharpen BJT models. It's the word *just* above that causes the problem. Spec sheet values don't go directly into the Spice BJT model. One might want to look at something like Microsim's PARTS program which comes with PSpice. It allows the user to develop his/her own models from spec-sheet and experimental data. But before we go any further with this, let us note that J.W. Swonger was asking for an *easy* way to get a (good?) model for the 2N4209. Perhaps someone can help him! --Phil
jws@cica22.mlb.semi.harris.com (James W. Swonger) (05/03/91)
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.