EF86

.SUBCKT EF86 A S G K

*
* Calculate reduction in mu when Vg < -3V
*
Emu     mu      0       VALUE={LIMIT{V(G,K),-3,999}+LIMIT{V(G,K)+3,-999,0}*0.714}
*
* Calculate contribution to cathode current
*
Eat     at      0       VALUE={0.636*ATAN(V(A,K)/15)}
Egs     gs      0       VALUE={LIMIT{V(S,K)/27.5+V(mu)*1.32+1,0,1E6}}
Egs2    gs2     0       VALUE={PWRS(V(gs),1.5)}
Ecath   cc      0       VALUE={V(gs2)*V(at)}
*
* Calculate anode current
*
Ga      A       K       VALUE={5.83E-4*V(cc)}
*
* Calculate screen current
*
Escrn   sc      0       VALUE={V(gs2)*(1.1-V(at))}
Gs      S       K       VALUE={0.5E-3*V(sc)}
*
* Capacitances
*
Cg1     G       K       3.8p
Cak     A       K       5.3p
Cg1a    G       A       0.05p

.ENDS

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