SPICE leakage current question

Why leakage current limits to 1e-9 Plot log scale 1e-12 to 1e-3

What the heck is making such a large leakage current and how to fix it?

Version 4 SHEET 1 2748 1028 WIRE 176 64 80 64 WIRE 336 64 176 64 WIRE 864 64 416 64 WIRE -96 128 -192 128 WIRE 80 128 -96 128 WIRE -96 192 -128 192 WIRE 176 192 176 128 WIRE 176 192 -96 192 WIRE -128 208 -128 192 WIRE -128 208 -192 208 WIRE 80 224 80 128 WIRE 176 224 176 192 WIRE 176 288 80 288 WIRE 864 304 864 64 WIRE 176 368 176 288 WIRE 864 496 864 432 FLAG 176 368 0 FLAG -96 128 P1 IOPIN -96 128 In FLAG -96 192 P2 IOPIN -96 192 In FLAG 864 496 0 SYMBOL diode 96 128 R180 WINDOW 0 -23 0 Left 2 WINDOW 3 45 27 Left 2 SYMATTR InstName D1 SYMATTR Value VB40X SYMBOL diode 192 128 R180 WINDOW 0 -20 1 Left 2 WINDOW 3 -64 -30 Left 2 SYMATTR InstName D2 SYMATTR Value VB40X SYMBOL diode 96 288 R180 WINDOW 0 24 64 Left 2 WINDOW 3 46 29 Left 2 SYMATTR InstName D3 SYMATTR Value VB40X SYMBOL diode 192 288 R180 WINDOW 0 24 64 Left 2 WINDOW 3 -71 65 Left 2 SYMATTR InstName D4 SYMATTR Value VB40X SYMBOL res 432 48 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 1Meg SYMBOL zener 880 368 R180 WINDOW 0 -61 38 Left 2 WINDOW 3 -108 7 Left 2 SYMATTR InstName DVR1 SYMATTR Value GV3S800 SYMBOL voltage -192 112 R0 WINDOW 0 38 54 Left 2 WINDOW 3 -136 -112 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 -133 -52 Left 2 SYMATTR InstName V1 SYMATTR Value "" SYMATTR SpiceLine Rser=10K Cpar=317nF SYMBOL diode 848 368 R0 WINDOW 0 49 31 Left 2 WINDOW 3 -80 30 Left 2 SYMATTR InstName D6 SYMATTR Value VB40X TEXT -208 360 Left 2 !.dc V1 0 1000 1 TEXT 728 344 Left 2 ;Victoreen\nCorotron TEXT -216 432 Left 2 !.MODEL GV3S800 D(Is=1e-24 Rs=10K Bv=800 Ibv=1e-24) TEXT -96 -72 Left 2 !.MODEL VB40X D(Rs=1.4 Vj=6.5V Bv=5000 Ibv=100uA) TEXT 104 48 Left 2 ;n001 TEXT 592 32 Left 2 ;n002 TEXT -96 -40 Left 2 ;VB40X 9mmX2mm Mfg not found; use VMI X50SG as ref TEXT -352 232 Left 2 ;HIVOLT POWER SUPPLY\nModel PSL2-5M\n2KV @

5MA\nCONDENSER PRODUCTS CO TEXT 696 288 Left 2 ;note: combo DVR1,D6 fair emulation TEXT 736 440 Left 2 ;I(DVR1,D6) TEXT 448 488 Left 2 ;Why leakage current limits to 1e-9\nPlot log scale 1e-12 to 1e-3

Thanks,

Note: In the old daze, my DOS SPICE program could .PRINT and/or .PLOT this directly with no scale fiddling.

Leakage spec for DVR1 changed to 20e-18 made no difference.

(omit circuit)

Have you looked at it with log-log axes? i.e change the x axis to log scale and look again to see if it looks reasonable to you.

Look above re my question: Why leakage current limits to 1e-9. Plot log scale 1e-12 to 1e-3 Does that look like i DID log scale? YUP that is what promoted the question.

I did what YOU said. Than I changed the X-axis (the horizontal one) to log scale and I do not see anything that limits to 1e-9.

1e-3

which is your question

1) why is there leakage current?

or

2) why is the leakage current limited to 1e-9?

or

3) something else? m

Am 23.06.2019 um 23:00 schrieb Robert Baer:> > Why leakage current limits to 1e-9

Hello Robert,

The leakage current is caused by the deafult value gmnin=1e-12.

1000V*1e-12mho = 1nA

You have to reduce gmin, if you don't like this limit. If you reduce gmin too much, you will run into convergence problems.

.options gmin=1e-14

Helmut

Thanks.