Hi, the other day I was talking to a friend about the reliability of libraries .model in simulators . It claims that it can happen and not infrequently, that the spice files are incorrect and as a result the simulation may be incorrect!. He gave me two sample files of a transistor for which he had problems saying that one of these models gave him busted results in the simulation. He talks about completely different numerical values. Since it also happened to me to have unexpected results and I did not understand why, I place the two of that .model for comparison. Thanks.
1) .MODEL BC549B NPN IS=4.679E-14 ISE=2.642f ISC=2.337E-14 XTI=3 BF=458.7 BR=11.57 IKF=0.1371 IKR=0.1144 XTB=1.5 VAF=52.64 VAR=364.5 VJE=0.5591 VJC=0.1994 RE=0.2598 RC=1 RB=1 RBM=1 IRB=1E-06 CJE=1.229E-11 CJC=4.42p XCJC=0.6193 FC=0.7936 NF=1.01 NR=1.019 NE=1.581 NC=1.164 MJE=0.3385 MJC=0.2782 TF=4.689E-10 TR=1m2 ITF=0.8842 VTF=2.828 XTF=160 EG=1.11 VCEO=30 ICRATING=100m MFG=PHILIPS
2) .MODEL BC549B NPN IS =1.8E-14 ISE=5.0E-14 NF =.9955 NE =1.46 BF =400 BR =35.5 IKF=.14 IKR=.03 ISC=1.72E-13 NC =1.27 NR =1.005 RB =.56 RE =.6 RC =.25 VAF=80 VAR=12.5 CJE=13E-12 TF =.64E-9 CJC=4E-12 TR =50.72E-9 VJC=.54 MJC=.33