***************************************************************** * ARRL Radio Designer 1.0 File EXRF9507.TXT V1.1 (30 Jul 1995) * * Exploring RF -- July 1995 *QST*, pp 79-81 * * compiled by David Newkirk, WJ1Z (dnewkirk@arrl.org) * * * * Using Optimization & Databank Data to Create a Realistic BIP * ***************************************************************** * * This block contains the BIP we'll adjust for equivalence with * measured S-parameter data. Note that the specification for alpha * differs from that shown in July 1995 Exploring RF: It shows a * _constrained_ value for alpha that lets the optimizer adjust * alpha for realism without pushing its value to a number that's * illegal for a real bipolar junction transistor. * * If you've gotten this circuit file as part of EXRF9507.ZIP, * remember that the graphs in the associated report file won't look * anything much like those shown in July 1995 Exploring RF until * you optimize this file's BIP for congruence with the MRF581 data. * BLK BIP 1 2 0 A=?0.8 0.98 0.999? RE=?1? F=?1GHZ? T=?0.01NS? + CE=?0.1PF? CI=?1PF? RC=?1000? RO=?0.1? CO=?1PF? + RB1=?1? RC1=?1E-6? RB2=?0.1? CBE=?10PF? + CBC=?0.1PF? CCE=?100E-6PF? LB=?1E-6NH? + LC=?100E-6NH? LE=?0.1NH? OPTBIP:2POR 1 2 0 END BLK TWO 1 2 0 MRF581 REALBIP:2POR 1 2 0 END FREQ 300MHZ 500MHZ 1000MHZ 1500MHZ END OPT * This block carries instructions for optimization. OPTBIP S=REALBIP TERM=0.01 END DATA MRF581:S * MOTCL MOTOROLA MRF581 Vce=10V Ic=100mA 300MHZ .66 -172 8.46 93 .05 49 .3 -134 500MHZ .68 174 5.06 82 .07 56 .25 -147 1000MHZ .68 157 2.64 65 .12 64 .23 -172 1500MHZ .72 139 1.86 52 .17 63 .27 -177 END