Version 4
SHEET 1 1180 680
WIRE 384 -16 384 -32
WIRE 336 112 80 112
WIRE 384 112 384 64
WIRE 384 112 336 112
WIRE 80 128 80 112
WIRE 384 144 384 112
WIRE 80 256 80 192
WIRE 384 256 384 224
WIRE 80 352 80 320
WIRE 384 352 384 336
WIRE 384 352 80 352
WIRE -144 432 -144 416
WIRE -64 432 -64 416
WIRE 384 432 384 352
WIRE 336 448 320 448
WIRE 336 496 320 496
WIRE 320 512 320 496
WIRE -144 528 -144 512
WIRE -64 528 -64 512
WIRE 384 544 384 512
FLAG 384 544 0
FLAG 384 -32 Ub
FLAG 320 448 In
FLAG 320 512 0
FLAG -144 528 0
FLAG -144 416 In
FLAG -64 528 0
FLAG -64 416 Ub
FLAG 336 112 Ub*
SYMBOL res 368 128 R0
SYMATTR InstName Rcu
SYMATTR Value 30
SYMBOL res 368 -32 R0
SYMATTR InstName Shunt
SYMATTR Value 1m
SYMBOL zener 96 256 M0
SYMATTR InstName D1
SYMATTR Value DFLZ33
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL diode 96 192 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value ES1D
SYMBOL voltage -144 416 R0
WINDOW 3 24 96 Invisible 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PWL(0 24 0.1 24 0.100000001 0 10 0)
SYMATTR InstName V1
SYMBOL voltage -64 416 R0
WINDOW 3 24 96 Invisible 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value 16
SYMATTR InstName V2
SYMBOL sw 384 528 M180
WINDOW 0 12 104 Left 2
WINDOW 3 17 11 Left 2
SYMATTR InstName S1
SYMATTR Value MYSW
SYMBOL ind 368 240 R0
SYMATTR InstName Lsp
SYMATTR Value 80m
TEXT -176 608 Left 2 !.model MYSW SW(Ron=100m Roff=1MEG Vt=1 Vh=0.5 Lser=0 Vser=0)
TEXT -176 640 Left 2 !.tran 0 104m 99m 500n
TEXT 424 464 Left 1 ;Roff=1MEG\nRon=100m