6146

.SUBCKT 6146 A S G K
*
* Calculate contribution to cathode current
*
Eat     at      0       VALUE={0.636*ATAN(V(A,K)/10)}
Eme     me      0       VALUE={LIMIT{V(A,K),0,10000}/130}
Emu     mu      0       VALUE={PWRS(V(G,K),1-(LIMIT{-V(G,K),30,9999}-30)/2000)}
Egs     gs      0       VALUE={LIMIT{V(A,K)/10+V(S,K)*4.5+V(mu)*19,0,1E6}}
Egs2    gs2     0       VALUE={PWRS(V(gs),1.5)*16E-6}
Ecath   cc      0       VALUE={LIMIT{V(gs2)*V(at),0,V(me)}}
Esd     sd      0       VALUE={LIMIT{V(gs2)*V(at)-V(me),0,99999}}
*
* Calculate anode current
*
Ga      A       K       VALUE={V(cc)}
*
* Calculate screen current
*
Escrn   sc      0       VALUE={2.5E-4*PWRS(V(S,K),1.5)*V(gs2)*(1.1-V(at))+V(sd)}
Gs      S       K       VALUE={V(sc)}
*
* Grid current
*
Gg      G       K       VALUE={PWR(LIMIT{V(G,K)+1,0,1E6},1.5)*(1.25-V(at))*870E-6}
*
* Capacitances
*
Cg1     G       K       13.0p
Cak     A       K       8.5p
Cg1a    G       A       0.24p

.ENDS

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