.SUBCKT 12AX7 P G K
#
#
.param u=83
#WK=IP/(VPK^1.5)ŌvZ
.param K=1.54u
.param RGR=1k
.param Cgp=2p
.param Cgk=2p
.param Cpk=1p
#
#PpGm[hɓdp̓do
B1  PpG  0  V=(if(sgn(V(P,K)+{u}*V(G,K)),V(P,K)+{u}*V(G,K),0))
R1  PpG  0  1MEG
#
#v[gdpd
Bp  P  K  I=({K}*PWR(V(PpG),1.5))
#Q[gd͋[pR_CI[h
RGr G  1 {RGR}
D1  1  K  DG
#
Cgp G  P  {Cgp}
Cgk G  K  {Cgk}
Cpk P  K  {Cpk}
.model DG D
.ENDS
