Version 4
SHEET 1 880 680
WIRE -368 128 -480 128
WIRE -208 128 -368 128
WIRE -160 128 -208 128
WIRE -16 128 -160 128
WIRE 288 128 -16 128
WIRE 544 128 288 128
WIRE -448 144 -528 144
WIRE -368 144 -368 128
WIRE -208 144 -208 128
WIRE -448 160 -448 144
WIRE 16 160 -32 160
WIRE 288 160 288 128
WIRE 288 160 240 160
WIRE -528 176 -528 144
WIRE -160 176 -160 128
WIRE -288 192 -304 192
WIRE -272 192 -288 192
WIRE 16 224 0 224
WIRE 256 224 240 224
WIRE -288 256 -288 192
WIRE -208 256 -208 240
WIRE -208 256 -288 256
WIRE 416 256 400 256
WIRE 544 256 544 128
WIRE -208 272 -208 256
WIRE -208 272 -224 272
WIRE -528 288 -528 256
WIRE -528 288 -544 288
WIRE -160 288 -160 256
WIRE -64 288 -64 256
WIRE -64 288 -160 288
WIRE 16 288 -64 288
WIRE 256 288 256 224
WIRE 256 288 240 288
WIRE 400 288 400 256
WIRE 400 288 256 288
WIRE -368 304 -368 240
WIRE -304 304 -368 304
WIRE -480 320 -480 128
WIRE -304 320 -304 304
WIRE -288 320 -304 320
WIRE 400 320 400 288
WIRE -512 336 -528 336
WIRE -432 352 -448 352
WIRE -16 352 -16 128
WIRE 16 352 -16 352
WIRE 320 352 240 352
WIRE -544 368 -544 288
WIRE -512 368 -544 368
WIRE 544 368 544 336
WIRE 544 368 512 368
WIRE -224 384 -224 368
WIRE 0 384 0 224
WIRE 0 384 -224 384
WIRE 256 384 256 288
WIRE 256 384 0 384
WIRE 512 384 512 368
WIRE -528 416 -528 336
WIRE -368 416 -368 400
WIRE -368 416 -528 416
WIRE -160 416 -368 416
WIRE -32 416 -32 160
WIRE -32 416 -80 416
WIRE 320 416 -32 416
WIRE 400 416 400 384
WIRE 400 416 320 416
WIRE 544 416 544 368
WIRE 544 416 400 416
FLAG -64 256 Out
IOPIN -64 256 Out
FLAG 512 384 0
FLAG 416 256 Ramp
IOPIN 416 256 Out
FLAG -480 384 0
FLAG -448 160 0
SYMBOL voltage 544 240 R0
WINDOW 0 10 14 Left 0
WINDOW 3 -13 57 Left 0
SYMATTR InstName V+
SYMATTR Value 15
SYMBOL Robertugo\\555_ALL 176 272 R0
WINDOW 38 -86 82 Left 0
WINDOW 0 -62 -82 Left 0
SYMATTR InstName U1
SYMBOL cap 384 320 R0
WINDOW 0 -35 34 Left 0
WINDOW 3 -33 61 Left 0
SYMATTR InstName Ct
SYMATTR Value 1n
SYMBOL pnp2 -304 240 R180
WINDOW 0 -5 97 Left 0
WINDOW 3 22 47 Left 0
SYMATTR InstName Q1
SYMATTR Value 2N3906
SYMBOL cap 304 352 R0
WINDOW 0 -38 16 Left 0
WINDOW 3 -33 49 Left 0
SYMATTR InstName Cbp
SYMATTR Value 10n
SYMBOL res -176 160 R0
SYMATTR InstName Rpu
SYMATTR Value 10k
SYMBOL pnp2 -272 240 M180
WINDOW 0 -5 97 Left 0
WINDOW 3 21 51 Left 0
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL pnp2 -288 368 M180
WINDOW 0 72 72 Left 0
WINDOW 3 22 47 Left 0
SYMATTR InstName Q4
SYMATTR Value 2N3906
SYMBOL npn2 -432 304 R0
WINDOW 0 42 27 Left 0
WINDOW 3 23 49 Left 0
SYMATTR InstName Q3
SYMATTR Value 2N3904
SYMBOL res -64 400 R90
WINDOW 0 15 108 VBottom 0
WINDOW 3 -13 1 VTop 0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL Robertugo\\OPAMP5 -480 288 R0
WINDOW 0 -24 64 Left 0
WINDOW 38 9 22 Left 0
SYMATTR InstName U2
SYMATTR SpiceModel level2
SYMBOL voltage -528 272 R180
WINDOW 0 -13 54 Left 0
WINDOW 3 -177 164 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vc
SYMATTR Value PULSE(0 12 0 1m)
TEXT -122 146 Left 0 !.tran 1m