Version 4
SHEET 1 2232 708
WIRE 576 -64 -144 -64
WIRE 320 80 288 80
WIRE 432 80 400 80
WIRE 496 80 432 80
WIRE 624 80 496 80
WIRE 432 112 432 80
WIRE 144 128 80 128
WIRE 704 128 704 80
WIRE 752 128 704 128
WIRE 1072 128 752 128
WIRE 1280 128 1072 128
WIRE 576 160 576 16
WIRE 640 160 576 160
WIRE 704 160 704 128
WIRE 1072 160 1072 128
WIRE 80 208 -32 208
WIRE 288 208 288 176
WIRE 288 208 80 208
WIRE 432 208 432 176
WIRE 432 208 288 208
WIRE 1280 208 1280 128
WIRE 80 256 80 208
WIRE 1072 256 1072 240
WIRE 1216 256 1072 256
WIRE 496 272 496 160
WIRE 496 272 352 272
WIRE 576 288 576 160
WIRE 1072 288 1072 256
WIRE 752 304 752 128
WIRE 208 336 80 336
WIRE 432 336 288 336
WIRE 512 336 432 336
WIRE 880 336 864 336
WIRE 1008 336 960 336
WIRE 1280 336 1280 304
WIRE 1360 336 1280 336
WIRE 1472 336 1424 336
WIRE 1616 336 1552 336
WIRE 864 384 864 336
WIRE 864 384 832 384
WIRE 1280 384 1280 336
WIRE 432 432 432 336
WIRE 864 432 864 384
WIRE 896 432 864 432
WIRE 1216 432 976 432
WIRE -144 448 -144 -64
WIRE 352 480 352 272
WIRE 368 480 352 480
WIRE -32 528 -32 208
WIRE -32 528 -144 528
WIRE 432 528 -32 528
WIRE 576 528 576 384
WIRE 576 528 432 528
WIRE 672 528 576 528
WIRE 752 528 752 368
WIRE 752 528 672 528
WIRE 832 528 832 384
WIRE 832 528 752 528
WIRE 1072 528 1072 384
WIRE 1072 528 832 528
WIRE 1280 528 1280 480
WIRE 1280 528 1072 528
WIRE 1616 528 1616 416
WIRE 1616 528 1280 528
WIRE 672 592 672 528
FLAG 672 592 0
SYMBOL npn 368 432 R0
SYMATTR InstName Q1
SYMATTR Value BC548C
SYMBOL npn 224 80 R0
SYMATTR InstName Q2
SYMATTR Value BC548C
SYMBOL res 240 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage 80 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 -59 20 Left 2
WINDOW 3 -408 80 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 4.8 16u 0 0 16u 32u 0)
SYMBOL res 480 64 R0
WINDOW 0 35 79 Left 2
WINDOW 3 35 60 Left 2
SYMATTR InstName R2
SYMATTR Value 100K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL cap 416 112 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL res 416 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 29 60 VTop 2
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL npn 512 288 R0
SYMATTR InstName Q3
SYMATTR Value BC639
SYMBOL diode 640 176 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL ind 560 -80 R0
SYMATTR InstName L1
SYMATTR Value 1µ
SYMATTR SpiceLine Ipk=0.01 Rser=1m Rpar=1 Cpar=0
SYMBOL res 720 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 53 VTop 2
SYMATTR InstName R4
SYMATTR Value 1Meg
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage 80 352 R180
WINDOW 0 24 96 Left 2
WINDOW 3 39 39 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 4.8 12.8u 0 0 19.2u 32u 0)
SYMBOL res 304 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL voltage -144 432 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 4.8
SYMBOL npn 1008 288 R0
SYMATTR InstName Q4
SYMATTR Value BC546B
SYMBOL npn 1216 384 R0
SYMATTR InstName Q5
SYMATTR Value BC546B
SYMBOL cap 1424 320 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 1µ
SYMATTR SpiceLine V=100
SYMBOL res 1568 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 100
SYMBOL res 1056 144 R0
SYMATTR InstName R7
SYMATTR Value 100K
SYMBOL res 976 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 100K
SYMBOL res 992 416 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 100K
SYMBOL npn 1216 208 R0
WINDOW 3 45 59 Left 2
WINDOW 0 39 32 Left 2
SYMATTR Value BC546B
SYMATTR InstName Q6
SYMBOL res 1600 320 R0
SYMATTR InstName R10
SYMATTR Value 1k
SYMBOL cap 736 304 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMATTR SpiceLine V=100
TEXT -152 592 Left 2 !.tran 0 1s 0 0.01