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Old 27th December 2009, 06:01 PM   #1
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Default Transistor modeling - how do I generate P-Spice Parameter ?

I need articles and books, where I can find more informations about this in general.
Particularly by old devices (e. g. germanium transistors like AD148, AD161/162 or AC128) but unfortunately even by some currently types (MJE340/350 or 2N/2SC/2SA series) unfortunately there are either nothing or unreliable values only available.

Thank you very much for your suggestions
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Old 27th December 2009, 10:19 PM   #2
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This is the best I can manage for now:

Quote:
The BJT default in ISSPICE4 gives first order, Ebers-Moll, DC
parameters; but it does not provide parameters for Transient or
AC analysis. The following default can be used when minimal
data sheet specifications are available by using the PARAM
program to evaluate the equations in curly braces. This model
will create a good transistor model from virtually any data sheet.
The parameters you must specify are:

IMAX Maximum collector current
COB Collector-base capacitance
FT Gain bandwidth product in Hz
TS Storage time

The equation-based model is shown below:
.MODEL NBJT NPN (CJC={2.2*COB} TF={.16/FT} TR={1.7*TS}
+CJE={7*COB} RC={.5/IMAX} VAF=100 IKF={.7*IMAX}
+ IS={2E-15*MAX} )

This subcircuit-based macro model makes use of the default
model parameters so that it is not permissible to change default
values without reevaluating the parameters which are given
here.
And if you want it more precise:

Improved SPICE Models for MJL3281A and MJL1302A - Section 3

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Old 27th December 2009, 11:51 PM   #3
danhard is offline danhard  Czech Republic
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http://www.electronics.oulu.fi/Opetu...UT/GP_DOCU.pdf
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Old 27th December 2009, 11:55 PM   #4
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Old 28th December 2009, 12:30 AM   #5
danhard is offline danhard  Czech Republic
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tiefbassuebertr,
what do you want to create with transistors out of bamboo?
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Old 28th December 2009, 12:34 AM   #6
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Fuzz pedal maybe?

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Old 28th December 2009, 05:31 AM   #7
andy_c is offline andy_c  United States
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Quote:
Originally Posted by tiefbassuebertr View Post
I need articles and books, where I can find more informations about this in general.
The best book I know of on this subject is by Massobrio and Antognetti titled Semiconductor Device Modeling with SPICE.
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Old 28th December 2009, 09:45 AM   #8
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Very interesting informations - thank you very much to all.

Danhard: "out of bamboo" - what means this ??
Please note: my colloquially english is very bad.
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Old 28th December 2009, 12:15 PM   #9
danhard is offline danhard  Czech Republic
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It is joke, germanium transistors made of bamboo wood
Sorry, my English is directly Zero.
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