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diff --git a/Windows/spice/examples/vdmos/VDMOS-DIO-AC.cir b/Windows/spice/examples/vdmos/VDMOS-DIO-AC.cir
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+++ b/Windows/spice/examples/vdmos/VDMOS-DIO-AC.cir
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+Capacitance and current comparison between models d and bulk diode in vdmos
+
+D1 ad kd dio
+.model dio d TT=1371n IS=2.13E-08 N=1.564 RS=0.0038 m=0.548 Vj=0.1 Cjo=3200pF
+
+Va ad 0 DC 0.5 AC 1 $ DC -20
+Vk kd 0 0
+
+m1 d g s IXTP6N100D2
+.MODEL IXTP6N100D2 VDMOS(KP=2.9 RS=0.1 RD=1.3 RG=1 VTO=-2.7 LAMBDA=0.03 CGDMAX=3000p CGDMIN=2p CGS=2915p a=1 TT=1371n IS=2.13E-08 N=1.564 RB=0.0038 m=0.548 Vj=0.1 Cjo=3200pF ksubthres=0.1 subslope=43m subshift=-25m)
+
+Vd d 0 DC -0.5 AC 1 $ DC 20
+Vg g 0 -5 $ transistor is off
+Vs s 0 0
+
+.ac dec 10 1 100K
+
+.control
+save @d1[id] @m1[id] all
+run
+plot mag(i(Vs)) mag (i(Vk))
+plot ph(i(Vs)) ph(i(Vk))
+.endc
+
+.end