download from https://groups.io/g/LTspice/topic/1n3714_germanium_tunnel_diode/50202014

* 1N2927 ; Tunnel Diode ; Silicon (Si) ; Microsemi Corp. ; TO-18
.SUBCKT 1N2927 1 4
* TERMINALS: A K
R1 1 2 7.210024u
L1 3 2 7.5n
B1 3 4 I=(V(3,4)*13.333e-4)*EXP(1-(V(3,4)*13.333))
B2 3 4 I=(.000035*EXP(V(3,4)-.475))
B3 3 4 I=(3.8503E-18)*(EXP((V(3,4)*38.61)-1))
.ENDS 1N2927

.subckt 1N3715 1 2
d1 1 2 DF
c1 1 2 10p
f1 1 2 v2 1
e0 10 0 1 2 1
r10 10 20 1meg
d10 0 20 dmod
e1 5 0 20 0 1
r1 5 4 1meg
d2 4 6 dmod
vv 6 0 0.35
b1 0 7 i=15.1839048*v(4)**5-16.88273767*v(4)**4 +6.963855542*v(4)**3-1.280954583*v(4)**2+0.0914520233*v(4)-7.457433336e-5
r2 7 8 1u
v2 8 0 DC 0
.model DF d (N=3.217 IS=4.716e-6 BV=0.2 IBV=0.003 )
.model dmod d (N=0.001)
.ends 1n3715
.Subckt 1N3716 1 2
.Param Vp=100mV Ip=4.7mA Vv=370mV Vt=26mV Vpp =525mV Iv=370uA
Bthermal 1 2 I=Ip*exp(-Vpp/Vt)*(exp(v(1,2)/Vt)-1)
Btunnel 1 2 I=Ip*(v(1,2)/Vp)*exp(1-v(1,2)/Vp)
Bexcess 1 2 I=Iv*exp(v(1,2)-Vv)
Cd 1 2 25pF
.Ends 1N3716

.SUBCKT 1N3858 1 2
R1 1 3 2.5
I0 3 2 1.2M
D1 3 2 DIODE
J1 4 2 3 NCHANNELJFET
J2 4 3 2 PCHANNELJFET
.MODEL NCHANNELJFET NJF(VTO=-.115V BETA=1.9 CGS=4P)
.MODEL PCHANNELJFET PJF(VTO=-.115V BETA=1.9 CGS=4P)
.MODEL DIODE D (RS=7 N=.6)
.ENDS 1N3858