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From: Jeroen Belleman <jeroen@nospam.please>
Newsgroups: sci.electronics.design
Subject: Re: fast NPN in LT Spice
Date: Mon, 3 Jun 2024 09:58:52 +0200
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On 6/3/24 00:36, john larkin wrote:
> There are many NPNs in the standard LT Spice library.
> 
> Does anyone know of a fast, RF type, transistor? It's hard to tell
> from the jillion lines of fine-print parameters.
> 
> I want to make a model of the MC10EP89 gate.
> 

I always used the -now obsolete- BFR92A for such things.
That's a 5GHz Ft NPN that I used often. It's not in the
library, I think. Below the model. Mind the line wraps.

Jeroen Belleman

..model BFR92A NPN IS=4.11877E-016 BF=1.02639E+002 NF=9.97275E-001 
VAF=6.26719E+001 IKF=3.20054E+000 ISE=4.01062E-015 NE=1.57708E+000 
BR=1.81086E+001 NR=9.96202E-001 VAR=3.36915E+000 IKR=1.28155E+000 
ISC=2.79905E-016       NC=1.07543E+000 RB=1.00000E+001 IRB=1.00000E-006 
RBM=1.00000E+001 RE=1.16450E+000 RC=2.32000E+000 EG=1.11000E+000 
XTI=3.00000E+000 CJE=8.90512E-013 VJE=6.00000E-001 MJE=2.58570E-001 
TF=1.54973E-011 XTF=3.91402E+001 VTF=2.15279E+000       ITF=2.13776E-001 
CJC=5.46563E-013 VJC=3.80824E-001 MJC=2.02935E-001