Version 4
SHEET 1 1924 956
WIRE 752 -144 -64 -144
WIRE 960 -144 752 -144
WIRE 1920 -144 960 -144
WIRE 752 -16 752 -144
WIRE 288 32 96 32
WIRE 624 32 352 32
WIRE 688 32 624 32
WIRE -64 48 -64 -144
WIRE 960 48 960 -144
WIRE 752 112 752 80
WIRE 848 112 752 112
WIRE 624 144 624 32
WIRE 752 144 752 112
WIRE 96 160 96 32
WIRE 848 160 848 112
WIRE 752 256 752 224
WIRE 848 256 848 224
WIRE 848 256 752 256
WIRE -64 288 -64 128
WIRE -64 288 -160 288
WIRE 96 288 96 240
WIRE 96 288 -64 288
WIRE 624 288 624 224
WIRE 624 288 96 288
WIRE 1104 288 624 288
WIRE 1920 288 1104 288
WIRE 1104 320 1104 288
WIRE -160 336 -160 288
WIRE 960 368 960 128
WIRE 1104 416 1104 384
WIRE 1104 416 1024 416
WIRE 1264 416 1104 416
WIRE -64 512 -64 288
WIRE 752 528 752 256
WIRE 960 528 960 464
WIRE 960 528 752 528
WIRE 1104 544 1104 416
WIRE 1264 560 1264 416
WIRE 752 576 752 528
WIRE -64 720 -64 592
WIRE 752 720 752 656
WIRE 752 720 -64 720
WIRE 1104 720 1104 624
WIRE 1104 720 752 720
WIRE 1264 720 1264 624
WIRE 1264 720 1104 720
WIRE 1920 720 1264 720
FLAG -160 336 0
SYMBOL voltage -64 32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -64 496 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL npn 688 -16 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL res 736 560 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL voltage 96 144 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(-10m 10m 250n 10n 10n 500n)
SYMATTR Value2 AC 1.
SYMBOL npn 1024 368 M0
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL res 944 32 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL diode 1088 320 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL res 1088 528 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 736 128 R0
SYMATTR InstName R4
SYMATTR Value 100
SYMBOL cap 832 160 R0
SYMATTR InstName C1
SYMATTR Value 20p
SYMBOL cap 352 16 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL res 608 128 R0
SYMATTR InstName R5
SYMATTR Value 4k7
SYMBOL cap 1248 560 R0
SYMATTR InstName C3
SYMATTR Value 1µ
TEXT 84 522 Left 2 !;tran 0 1µ 0 100p
TEXT 80 568 Left 2 !.ac dec 1k 100k 1e9