# Help with using a tunnel diode in LTspice

I want to use a tunnel diode to implement a simple van der pol oscillator circuit. So far I found a SPICE code for 1N4393 from this reference.

Is it possible to simulate 1N4393 to convert and use the following SPICE code for LTspice?:

* JFET n-type, analog switch; 40V 50 mA, low Ron resistance
.MODEL 1N4393 NJF (VTO=-1.50 BETA=4m LAMBDA=.035 RD=14 RS=15 IS=2E-15
+ CGS=7p CGD=9p KF=1.5E-16

• As far as I'm aware, the same model statements/parameters are used. – Andy aka Dec 4 '19 at 8:24
• @Andyaka In LTspice diode models are given as follows: .model DA227Y D(Is=936.8p N=1.721 Rs=1.02 Ikf=28.9 Cjo=1.793p M=189.9m Vj=865.3m Isr=2.051n Nr=2.4 Bv=80 tt=37n Iave=0.1 Vpk=80 mfg=Rohm type=Switching) But the code in question is different I tried to copy paste it but didnt see such diode in LTspice. Maybe a modification is required. Waiting for some LTspice wizards save me. – cm64 Dec 4 '19 at 9:22
• Chua et al., 1985, DOI: 10.1109/TCS.1985.1085599 – jonk Dec 4 '19 at 10:36
• Found this open access thing on Esaki diode modeling. I don't consider it anywhere near as interesting as the seminal paper I mentioned earlier. But it's available on the web. So that is its good point. – jonk Dec 4 '19 at 18:52