Version 4
SHEET 1 2448 1092
WIRE 176 224 48 224
WIRE 816 224 176 224
WIRE 912 224 816 224
WIRE 1216 224 912 224
WIRE 1312 224 1216 224
WIRE 816 240 816 224
WIRE 1312 240 1312 224
WIRE 912 288 912 224
WIRE 1216 288 1216 224
WIRE 576 336 560 336
WIRE 672 336 656 336
WIRE 816 336 816 320
WIRE 816 336 784 336
WIRE 848 336 816 336
WIRE 1312 336 1312 320
WIRE 1312 336 1280 336
WIRE 1344 336 1312 336
WIRE 1488 336 1456 336
WIRE 1584 336 1568 336
WIRE 560 384 560 336
WIRE 1216 384 1184 384
WIRE 1584 384 1584 336
WIRE 912 416 912 384
WIRE 1040 416 912 416
WIRE 384 432 336 432
WIRE 496 432 464 432
WIRE 1040 432 1040 416
WIRE 1664 432 1648 432
WIRE 1792 432 1744 432
WIRE 48 512 48 224
WIRE 176 512 176 224
WIRE 1040 528 1040 512
WIRE 1184 528 1184 384
WIRE 1184 528 1040 528
WIRE 912 560 912 416
WIRE 1184 560 1184 528
WIRE 560 608 560 480
WIRE 592 608 560 608
WIRE 816 608 672 608
WIRE 848 608 816 608
WIRE 1280 608 1248 608
WIRE 1456 608 1280 608
WIRE 1584 608 1584 480
WIRE 1584 608 1536 608
WIRE 816 624 816 608
WIRE 1280 624 1280 608
WIRE 336 656 336 432
WIRE 1792 656 1792 432
WIRE 816 720 816 704
WIRE 912 720 912 656
WIRE 912 720 816 720
WIRE 1040 720 912 720
WIRE 1184 720 1184 656
WIRE 1184 720 1040 720
WIRE 1280 720 1280 704
WIRE 1280 720 1184 720
WIRE 1040 752 1040 720
WIRE 48 768 48 592
WIRE 176 768 176 576
WIRE 336 768 336 736
WIRE 1792 768 1792 736
FLAG 336 768 0
FLAG 1792 768 0
FLAG 48 768 0
FLAG 176 768 0
FLAG 1344 336 a
IOPIN 1344 336 In
FLAG 672 336 a
IOPIN 672 336 Out
FLAG 1456 336 b
IOPIN 1456 336 Out
FLAG 784 336 b
IOPIN 784 336 In
FLAG 336 432 1
FLAG 1792 432 2
FLAG 1040 752 0
SYMBOL pnp 848 384 M180
SYMATTR InstName Q1
SYMATTR Value BC556B
SYMBOL pnp 1280 384 R180
SYMATTR InstName Q2
SYMATTR Value BC556B
SYMBOL npn 848 560 R0
SYMATTR InstName Q3
SYMATTR Value BC546B
SYMBOL npn 1248 560 M0
SYMATTR InstName Q4
SYMATTR Value BC546B
SYMBOL npn 1648 384 M0
SYMATTR InstName Q5
SYMATTR Value BC546B
SYMBOL npn 496 384 R0
SYMATTR InstName Q6
SYMATTR Value BC546B
SYMBOL voltage 336 640 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
WINDOW 3 -70 180 Left 2
SYMATTR Value PULSE(0 5 {500µ+TB} 10n 10n {500µ-TB} 1m)
SYMATTR InstName V1
SYMBOL voltage 1792 640 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
WINDOW 3 -389 185 Left 2
SYMATTR Value PULSE(0 5 {TB} 10n 10n {500µ-TB} 1m)
SYMATTR InstName V2
SYMBOL res 1024 416 R0
SYMATTR InstName R2
SYMATTR Value 600
SYMBOL res 1584 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 470
SYMBOL Misc\\battery 48 496 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 132 Left 2
SYMATTR SpiceLine Rser=1
SYMATTR InstName V3
SYMATTR Value 24
SYMBOL cap 160 512 R0
SYMATTR InstName C1
SYMATTR Value 100µ
SYMATTR SpiceLine Rser=.1
SYMBOL res 480 416 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100
SYMBOL res 1760 416 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 100
SYMBOL res 672 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 470
SYMBOL res 832 336 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R13
SYMATTR Value {RB}
SYMBOL res 1296 336 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R14
SYMATTR Value {RB}
SYMBOL res 832 720 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R15
SYMATTR Value {RB}
SYMBOL res 1264 720 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R16
SYMATTR Value {RB}
SYMBOL res 576 624 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R17
SYMATTR Value 220
SYMBOL res 1440 624 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R18
SYMATTR Value 220
TEXT 32 880 Left 2 !.tran 0 0.503m 0.5m 100n
TEXT 32 920 Left 2 !.options plotwinsize=0
TEXT 32 960 Left 2 !.param TB=0n
TEXT 32 1000 Left 2 !.param RB=1G
TEXT 40 1040 Left 2 !.step param RB list 1G 470\n.step param TB list 0 500n
TEXT 272 960 Left 2 ;500n
TEXT 368 880 Left 2 ;.tran 0 2.5m 0.5m 100n
TEXT 272 992 Left 2 ;470