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Koren/Maillet 12ax7 model transfer test



Koren/Maillet model test *(1) Koren 12ax7 spice model Vpc 2 0 250 Vg1c 1 0 0 x1 2 1 0 12ax7 .SUBCKT 12AX7 1 2 3 ; P G C; NEW MODEL + PARAMS: MU=100 EX=1.4 KG1=1060 KP=600 KVB=300 RGI=2000 + CCG=2.3P CGP=2.4P CCP=.9P ; ADD .7PF TO ADJACENT PINS; .5 TO OTHERS. E1 7 0 VALUE= +{V(1,3)/KP*LOG(1+EXP(KP*(1/MU+V(2,3)/SQRT(KVB+V(1,3)*V(1,3)))))} RE1 7 0 1G G1 1 3 VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))/KG1} RCP 1 3 1G ; TO AVOID FLOATING NODES IN MU-FOLLOWER C1 2 3 {CCG} ; CATHODE-GRID C2 2 1 {CGP} ; GRID=PLATE C3 1 3 {CCP} ; CATHODE-PLATE D3 5 3 DX ; FOR GRID CURRENT R1 2 5 {RGI} ; FOR GRID CURRENT .MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N) .ENDS .DC Vpc 0 500 5 Vg1c -5 0 .5 .probe .end *(2) Maillet 12ax7 spice model Vpc 2 0 0 Vgc 1 0 0 x1 2 1 0 RCA12ax7 ***************** p g c *************************************************** .subckt RCA12ax7 1 2 3 ************************* eGIogVpc 20 0 value={log(v(1,3))} rGlogVpc 20 0 1 eG0 10 0 poly(1) <2,3> -3.7694e+00 1.9947e+00 5.9432e-02 eG1 11 0 poly(1) <2,3> -3.2024e-02 -4.1443e-02 -4.8236e-03 eG2 12 0 poly(1) <2,3> 1.9127e-02 -1.2189e-02 -1.5526e-03 eG3 13 0 poly(1) <2,3> -1.1354e-02 4.9339e-03 6.1016e-04 rG0 10 0 1 rG1 11 0 1 rG2 12 0 1 rG3 13 0 1 gG 2 3 value={(exp(v(10)+v(20)*(v(11)+v(20)*(v(12)+v(20)*v(13)))))/170} eP0 110 0 poly(1) <2,3> -9.9158e+0 1.9145e+0 -2.8135e+0 1.8661e+0 + 1.5643e+0 4.7240e-1 6.4276e-2 3.3101e-3 eP1 111 0 poly(1) <2,3> 9.5428e-1 3.2558e-2 -8.3349e-1 -4.8578e-2 + 2.6213e-1 1.0492e-1 1.8921e-2 1.3632e-3 eP2 112 0 poly(1) <2,3> 9.5766e-2 2.5192e-2 2.2391e-1 -1.7040e-1 + -2.4952e-1 -1.0960e-1 -2.0981e-2 -1.4882e-3 eP3 113 0 poly(1) <2,3> -6.6107e-2 -3.9657e-2 7.5560e-2 3.1025e-2 + 2.4265e-2 1.7002e-2 4.2512e-3 3.4761e-4 eP4 114 0 poly(1) <2,3> 8.4148e-3 4.7989e-3 -1.3258e-2 -1.9288e-3 + 5.2888e-4 -5.6853e-4 -2.4727e-4 -2.4359e-5 rP0 110 0 1 rP1 111 0 1 rP2 112 0 1 rP3 113 0 1 rP4 114 0 1 gP 1 3 value={(exp(v(110)+v(20)*(v(111)+v(20)*(v(112)+v(20)*(v(113)+v(20)*v(114))))))} Cgc 2 3 1.8p Cgp 2 1 1.7p Cpc 1 3 1.9p .ends .DC Vpc 5 500 5 Vgc -5.0 1.0 0.5 .probe .end

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