Version 4
SHEET 1 1000 1064
WIRE 288 32 -112 32
WIRE 800 32 352 32
WIRE -112 144 -112 32
WIRE -112 144 -144 144
WIRE -96 144 -112 144
WIRE 32 144 -16 144
WIRE 96 144 32 144
WIRE 128 144 96 144
WIRE 256 144 192 144
WIRE 304 144 256 144
WIRE 384 144 368 144
WIRE 448 144 384 144
WIRE 496 144 448 144
WIRE 608 144 560 144
WIRE 656 144 608 144
WIRE 800 144 800 32
WIRE 800 144 720 144
WIRE 832 144 800 144
WIRE 96 256 96 144
WIRE 208 256 96 256
WIRE 384 256 384 144
WIRE 384 256 288 256
WIRE 320 304 272 304
WIRE 384 304 320 304
WIRE 448 304 384 304
WIRE 512 304 448 304
WIRE 720 304 592 304
WIRE 736 304 720 304
WIRE 384 352 384 304
WIRE 448 368 448 304
WIRE 736 368 736 304
WIRE 224 480 224 304
WIRE 384 480 384 432
WIRE 384 480 224 480
WIRE 448 480 448 432
WIRE 448 480 384 480
WIRE 736 480 736 448
WIRE 736 480 448 480
WIRE 800 480 800 144
WIRE 800 480 736 480
FLAG 32 144 N01041
FLAG 448 144 N01060
FLAG 320 304 N02098
FLAG 256 144 N01061
FLAG 608 144 N10655
FLAG -144 144 DIAC_IN
FLAG 720 304 TRG
FLAG 832 144 DIAC_OUT
SYMBOL sw 192 256 R270
WINDOW 0 39 0 VRight 2
WINDOW 3 32 88 VRight 2
SYMATTR InstName S_S1
SYMATTR Value _S1
SYMBOL diode 192 160 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D_D1
SYMATTR Value DZ19V
SYMBOL diode 304 160 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D_D2
SYMATTR Value DZ19V
SYMBOL diode 560 128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D_D3
SYMATTR Value DZ14V
SYMBOL diode 656 128 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D_D4
SYMATTR Value DZ14V
SYMBOL voltage -112 144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName V_IDIAC1
SYMATTR Value DC 0Vdc AC 0Vac
SYMBOL cap 432 368 R0
SYMATTR InstName C_C1
SYMATTR Value 1µ IC=0
SYMBOL res 496 320 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R_R1
SYMATTR Value {1.462*Tr}
SYMBOL res 400 336 M0
SYMATTR InstName RS_S1
SYMATTR Value 1G
SYMBOL Misc\\Epoly 736 352 M0
WINDOW 3 24 156 Left 2
SYMATTR Value VALUE { IF(ABS(I(V_IDIAC1))>{Ibo},1,0)}
SYMATTR InstName E_ABM1
SYMBOL cap 288 16 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C_C2
SYMATTR Value 10p
TEXT -176 -128 Left 2 !.MODEL        _S1 VSWITCH Roff=1e7 Ron=2.2 Voff=0.1V Von=0.99V
TEXT -176 -112 Left 2 !.model DZ14V    D(Is=3.142f Rs=0.1 Ikf=0 N=1 Xti=3 Eg=1.11 M=.3282\n+                               Vj=.75 Fc=.5 Isr=1.973n Nr=2 Bv={Vbo} Ibv=.14467 Nbv=1.093\n+                               Ibvl=.1m Nbvl=1.2722 Tbv1=001433.3u)
TEXT -176 -56 Left 2 !.model DZ19V D(Is=6.994f Rs=5.612 Ikf=0 N=1 Eg=1.11 M=.2906\n+                    Vj=.75 Fc=.5 Isr=2.088n Nr=2 Bv={Delta_V} Ibv=.17098 Nbv=1.2072\n+                    Ibvl=2.002m Nbvl=1.1457 Tbv1=888.89u)
TEXT 448 -120 Left 2 !;DB3TG\n.param Tr=0.342\n.param Vbo=13.6V\n.param Delta_V=19V\n.param Ibo=6u\n.param Ih=7.3m