Version 4
SHEET 1 880 680
WIRE 320 0 256 0
WIRE 528 0 464 0
WIRE 752 0 672 0
WIRE 0 64 -160 64
WIRE -160 96 -160 64
WIRE 0 112 0 64
WIRE 160 112 0 112
WIRE 256 112 256 80
WIRE 320 112 320 0
WIRE 368 112 320 112
WIRE 464 112 464 80
WIRE 528 112 528 0
WIRE 576 112 528 112
WIRE 672 112 672 80
WIRE 160 144 0 144
WIRE -160 208 -160 176
WIRE -80 208 -160 208
WIRE 0 208 0 144
WIRE 0 208 -80 208
WIRE 256 208 256 144
WIRE 368 208 368 144
WIRE 368 208 256 208
WIRE 464 208 464 144
WIRE 576 208 576 144
WIRE 576 208 464 208
WIRE 672 208 672 144
WIRE 752 208 752 0
WIRE 752 208 672 208
WIRE 672 240 672 208
FLAG -80 288 0
FLAG 672 240 0
SYMBOL tline 208 128 R0
SYMATTR InstName T1
SYMBOL tline 416 128 R0
SYMATTR InstName T2
SYMBOL tline 624 128 R0
SYMATTR InstName T3
SYMBOL Misc/signal -160 80 R0
WINDOW 3 -79 -44 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 1 0 0 0 1n 2000n)
SYMBOL res 240 -16 R0
SYMATTR InstName R1
SYMATTR Value 1
SYMBOL res 448 -16 R0
SYMATTR InstName R2
SYMATTR Value 1
SYMBOL res 656 -16 R0
SYMATTR InstName R3
SYMATTR Value 1
SYMBOL res -96 192 R0
SYMATTR InstName R4
SYMATTR Value 100meg
TEXT 256 336 Left 2 !.tran 190ns