From: Vladimir D. <vo...@mi...> - 2010-11-26 05:56:55
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Hi all, I have been using Qucs for a while now - great job ! I am adding a model for a BFG540X transistor using constants from manufacturer's SPICE file. The file simply uses a built-in BJT model, so I have been filling in corresponding entries in Qucs. However, Qucs model is more complex and has extra parameters. What would be good default values for Xcgc, TR, MJS, VJS and FC ? Thank you very much ! Vladimir Dergachev PS My current model: <Component BFG540X> <Description> Si npn 400mW 15V 120mA 9GHz pkg:SOT-143 added by Vladimir Dergachev Xcgc parameter is set to 0.05 - not specified in the model file, same for TR, MJS, VJS and FC </Description> <Model> <_BJT BFG540X_ 1 0 0 8 -26 0 0 "npn" 0 "1.04516f" 0 "0.981774" 0 "0.992532" 0 "10" 0 "0.166296" 0 "41.6981" 0 "2.09773" 0 "2.32436e-13" 0 "2.02825" 0 "1.29849E-016" 0 "1.06486" 0 "184.359" 0 "43.9917" 0 "5" 0 "1e-6" 0 "1.34" 0 "0.353552" 0 "5" 0 "1.97895E-012" 0 "0.6" 0 "0.332695" 0 "7.93745E-013" 0 "0.185522" 0 "8.41656E-002" 0 "0.05" 0 "0" 0 "0.75" 0 "0" 0 "0.72063" 0 "7.45719p" 0 "11.4072" 0 "3.15854" 0 "1.56917E-001" 0 "1.0037n" 0 "26.85" 0 "0" 0 "1" 0 "1" 0 "0" 0 "1" 0 "1" 0 "0" 0 "0" 0 "3" 0 "1.11" 0 "26.85" 0 "1" 0> </Model> </Component> |
From: Stefan J. <st...@gr...> - 2011-03-03 09:04:39
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Am Fr, 26.11.2010, 06:56 schrieb Vladimir Dergachev: > Hi all, Hello! > I have been using Qucs for a while now - great job ! > > I am adding a model for a BFG540X transistor using constants from > manufacturer's SPICE file. The file simply uses a built-in BJT model, so I > have > been filling in corresponding entries in Qucs. > > However, Qucs model is more complex and has extra parameters. What > would be good default values for Xcgc, TR, MJS, VJS and FC ? Please refer to http://qucs.sourceforge.net/tech/node70.html for the meaning of those parameters and a reasonable default value. Best regards, Stefan. |