*****************************RCA12AX7A Spice Model "Dream" Version 2.1 (Pspice sintax)**************************************            
*************************created by Leonardo Di Carlo on 19th September 2007************************                             
*$
.SUBCKT 12AX7A 1 2 3                                                                                                        
*              A G C                                                                                                        
+PARAMS: CCG=2.3P  CGP=2.4P CCP=.9P  D1=0.02 K1=1.3 Voff=-0.3
+        a0G=4.078038328397099e-004 a1G=-1.707012749804205e-004 b1G=-2.795321128757336e-004 
+        a2G=-3.977259950874701e-005 b2G=-2.019086980287667e-005 a3G=-7.325989432415848e-006
+        b3G=-1.993267331125395e-005 a4G=-1.277705414730726e-005 b4G=1.602298326944057e-005 wG=4.833219467061220e-001
+        a0H=2.555511440193710e+000 a1H=2.144677492761441e+000 b1H=3.930600128339031e+000 
+        a2H=-1.694583732063634e+000 b2H=2.410350422340002e+000 a3H=-1.280668290691556e+000 
+        b3H=-2.508546825262458e-001 a4H=-5.798003623995759e-002 b4H=-2.891753242849665e-001 wH=5.275142079594077e-001
+        a0MU=5.576436595040941e+001 a1MU=-2.764717938648795e+001 b1MU=-1.964237677821670e+001 
+        a2MU=1.013193260634988e+000 b2MU=-7.140575499071005e+000 a3MU=2.764669622519628e-001 
+        b3MU=2.338439088981428e+000 a4MU=-1.149730793093910e+000 b4MU=6.067911208262837e-001 wMU=6.209904905764004e-001
*
GG 11 0 Value={IF(V(2,3)<-5,a0G+a1G*cos(-5*wG)+b1G*sin(-5*wG)+a2G*cos(2*-5*wG)+b2G*sin(2*-5*wG)+a3G*cos(3*-5*wG)+
+              b3G*sin(3*-5*wG)+a4G*cos(4*-5*wG)+b4G*sin(4*-5*wG),IF(V(2,3)>=-5&V(2,3)<=1.5,a0G+
+              a1G*cos(V(2,3)*wG)+b1G*sin(V(2,3)*wG)+a2G*cos(2*V(2,3)*wG)+b2G*sin(2*V(2,3)*wG)+a3G*cos(3*V(2,3)*wG)+
+              b3G*sin(3*V(2,3)*wG)+a4G*cos(4*V(2,3)*wG)+b4G*sin(4*V(2,3)*wG),a0G+a1G*cos(1.5*wG)+b1G*sin(1.5*wG)+
+              a2G*cos(2*1.5*wG)+b2G*sin(2*1.5*wG)+a3G*cos(3*1.5*wG)+b3G*sin(3*1.5*wG)+a4G*cos(4*1.5*wG)+b4G*sin(4*1.5*wG)))}
VG 12 11 0
RG 12 0 1U
GH 13 0 Value={IF(V(2,3)<-5,a0H+a1H*cos(-5*wH)+b1H*sin(-5*wH)+a2H*cos(2*-5*wH)+b2H*sin(2*-5*wH)+a3H*cos(3*-5*wH)+
+              b3H*sin(3*-5*wH)+a4H*cos(4*-5*wH)+b4H*sin(4*-5*wH),IF(V(2,3)>=-5&V(2,3)<=1.5,a0H+a1H*cos(V(2,3)*wH)+
+              b1H*sin(V(2,3)*wH)+a2H*cos(2*V(2,3)*wH)+b2H*sin(2*V(2,3)*wH)+a3H*cos(3*V(2,3)*wH)+b3H*sin(3*V(2,3)*wH)+
+              a4H*cos(4*V(2,3)*wH)+b4H*sin(4*V(2,3)*wH),a0H+a1H*cos(1.5*wH)+b1H*sin(1.5*wH)+a2H*cos(2*1.5*wH)+
+              b2H*sin(2*1.5*wH)+a3H*cos(3*1.5*wH)+b3H*sin(3*1.5*wH)+a4H*cos(4*1.5*wH)+b4H*sin(4*1.5*wH)))}
VH 14 13 0
RH 14 0 1U
GMU 15 0 Value={IF(V(2,3)<-5,a0MU+a1MU*cos(-5*wMU)+b1MU*sin(-5*wMU)+a2MU*cos(2*-5*wMU)+b2MU*sin(2*-5*wMU)+a3MU*cos(3*-5*wMU)+
+               b3MU*sin(3*-5*wMU)+a4MU*cos(4*-5*wMU)+b4MU*sin(4*-5*wMU),IF(V(2,3)>=-5&V(2,3)<=1.5,a0MU+a1MU*cos(V(2,3)*wMU)+
+               b1MU*sin(V(2,3)*wMU)+a2MU*cos(2*V(2,3)*wMU)+b2MU*sin(2*V(2,3)*wMU)+a3MU*cos(3*V(2,3)*wMU)+
+               b3MU*sin(3*V(2,3)*wMU)+a4MU*cos(4*V(2,3)*wMU)+b4MU*sin(4*V(2,3)*wMU),a0MU+a1MU*cos(1.5*wMU)+b1MU*sin(1.5*wMU)+
+               a2MU*cos(2*1.5*wMU)+b2MU*sin(2*1.5*wMU)+a3MU*cos(3*1.5*wMU)+b3MU*sin(3*1.5*wMU)+a4MU*cos(4*1.5*wMU)+
+               b4MU*sin(4*1.5*wMU)))}
VMU 16 15 0
RMU 16 0 1U
*
GSpace 17 0 Value={I(VG)*(PWR(V(2,3)+I(VH)+V(1,3)/I(VMU),1.5)+PWRS(V(2,3)+I(VH)+V(1,3)/I(VMU),1.5))/2} 
VSpace 18 17 0 
RSpace 18 0 1U
*
Ggrid1 20 0 Value={IF(V(2,3)>=Voff,I(VSpace)/(1+D1*(V(1,3)/(V(2,3)+(-Voff)))^K1),0)} 
Vgrid1 21 20 0   
Rgrid1 21 0 1U                                                                    
GPlate1 22 0 Value={I(Vspace)-I(Vgrid1)}                                   
VPlate1 23 22 0                                                          
RPlate1 23 0 1U
*
FPlate 1 3 VPlate1 1 
FGrid 2 3 Vgrid1 1
C1 2 3 {CCG}                                                                          
C2 2 1 {CGP}                                                                          
C3 1 3 {CCP}                                                                          
.ENDS