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Are small signal npn transistors really so different from one another?

Discussion in 'Electronic Design' started by Paul Burridge, Dec 20, 2003.

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  1. Sorry, I suppose I really should post the models:

    ..model 2N3904 NPN(IS=1E-14 VAF=100
    Bf=300 IKF=0.4 XTB=1.5 BR=4
    CJC=4E-12 CJE=8E-12 RB=20 RC=0.1 RE=0.1
    TR=250E-9 TF=350E-12 ITF=1 VTF=2 XTF=3 Vceo=40 Icrating=200m

    ..model 2N5769 NPN(Is=44.14f Xti=3 Eg=1.11 Vaf=100 Bf=78.32 Ne=1.389
    Ise=91.95f Ikf=.3498 Xtb=1.5 Br=12.69m Nc=2 Isc=0 Ikr=0 Rc=.6
    Mjc=86.19m Vjc=.75 Fc=.5 Cje=4.5p Mje=.2418 Vje=.75 Tr=1.073u
    Tf=227.6p Itf=.3 Vtf=4 Xtf=4 Rb=10 Vceo=15 Icrating=200m
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