Version 4
SHEET 1 880 680
WIRE -80 160 -80 144
WIRE -80 256 -80 240
WIRE -80 272 -80 256
WIRE -80 384 -80 368
WIRE -64 256 -80 256
WIRE 16 256 0 256
WIRE 16 272 16 256
WIRE 16 320 -16 320
WIRE 48 272 16 272
WIRE 48 272 48 208
WIRE 64 208 48 208
WIRE 96 144 -80 144
WIRE 96 176 96 144
WIRE 96 320 80 320
WIRE 96 320 96 256
WIRE 96 352 96 336
WIRE 112 272 48 272
WIRE 112 320 112 272
WIRE 128 320 112 320
WIRE 128 336 96 336
WIRE 128 384 -80 384
WIRE 128 384 128 336
WIRE 144 208 128 208
WIRE 144 256 96 256
WIRE 144 256 144 208
WIRE 208 256 144 256
WIRE 224 320 192 320
WIRE 288 144 96 144
WIRE 288 160 288 144
WIRE 288 256 272 256
WIRE 288 256 288 240
WIRE 288 272 288 256
WIRE 288 384 128 384
WIRE 288 384 288 368
WIRE 336 144 288 144
WIRE 336 288 336 144
WIRE 336 384 288 384
WIRE 336 384 336 352
WIRE 432 144 336 144
WIRE 432 192 432 144
WIRE 432 272 432 256
WIRE 432 384 336 384
WIRE 432 384 432 352
FLAG 96 352 0
SYMBOL diode 128 336 R270
WINDOW 0 32 32 VTop 0
WINDOW 3 0 32 Invisible 0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 448 256 R180
WINDOW 0 24 72 Left 0
WINDOW 3 32 43 Invisible 0
SYMATTR InstName D2
SYMATTR Value MURS120
SYMBOL cap 0 240 R90
WINDOW 0 42 57 VBottom 0
WINDOW 3 31 1 VTop 0
SYMATTR InstName C1
SYMATTR Value 220p
SYMBOL cap 272 240 R90
WINDOW 0 -12 81 VBottom 0
WINDOW 3 -13 70 VTop 0
SYMATTR InstName C2
SYMATTR Value 220p
SYMBOL polcap 320 288 R0
WINDOW 0 -42 31 Left 0
WINDOW 3 -36 58 Left 0
SYMATTR InstName C3
SYMATTR Value 100µ
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=16 Irms=1.436 Rser=0.08 MTBF=0 Lser=2.5p mfg="KEMET" pn="T495X107K016AS4823" type="Tantalum" ppPkg=1
SYMBOL Pote 160 192 R90
WINDOW 0 -1 9 VCenter 0
WINDOW 123 49 66 VCenter 0
WINDOW 3 -4 137 VCenter 0
SYMATTR InstName Duty
SYMATTR Value2 Set=val
SYMATTR Value Rt=300k
SYMBOL res 272 144 R0
WINDOW 0 -40 29 Left 0
WINDOW 3 -44 54 Left 0
SYMATTR InstName R1
SYMATTR Value 1K5
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -96 144 R0
WINDOW 0 25 50 Left 0
WINDOW 3 21 83 Left 0
SYMATTR InstName R2
SYMATTR Value 1K5
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL diode 80 304 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 Invisible 0
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL npn3 224 272 R0
WINDOW 0 -26 68 Left 0
WINDOW 3 -43 97 Left 0
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL npn3 -16 272 M0
WINDOW 0 -32 68 Left 0
WINDOW 3 -54 95 Left 0
SYMATTR InstName Q2
SYMATTR Value 2N2222
SYMBOL voltage 432 256 R0
WINDOW 0 -54 94 VRight 0
WINDOW 3 -53 -64 VRight 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 15 1k)
TEXT -80 120 Left 0 !.step param val 0.07 .93 .3
TEXT 328 120 Left 0 !.tran .5m