Version 4
SHEET 1 880 680
WIRE 272 -128 0 -128
WIRE -304 -80 -656 -80
WIRE -224 -80 -304 -80
WIRE -656 -48 -656 -80
WIRE 0 -16 0 -128
WIRE -656 64 -656 32
WIRE 272 112 272 -128
WIRE -304 128 -304 0
WIRE 112 128 112 80
WIRE 112 128 -304 128
WIRE 240 128 112 128
WIRE 576 144 576 96
WIRE 576 144 304 144
WIRE -304 160 -304 128
WIRE -304 160 -656 160
WIRE -224 160 -224 0
WIRE 160 160 160 80
WIRE 160 160 -224 160
WIRE 240 160 160 160
WIRE -656 176 -656 160
WIRE 0 176 0 64
WIRE 0 176 -48 176
WIRE -48 192 -48 176
WIRE 576 192 576 144
WIRE 0 224 0 176
WIRE -304 288 -304 160
WIRE -224 288 -224 160
WIRE -656 304 -656 256
WIRE 576 304 576 272
WIRE 0 352 0 304
WIRE 272 352 272 176
WIRE 272 352 0 352
WIRE -256 368 -304 368
WIRE -224 368 -256 368
WIRE -256 400 -256 368
FLAG 576 96 out
FLAG 112 80 in1
FLAG -48 192 0
FLAG -656 304 0
FLAG 576 304 0
FLAG 160 80 in2
FLAG -656 64 0
FLAG -256 400 0
SYMBOL voltage 0 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 20
SYMBOL voltage 0 208 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 20
SYMBOL res 560 176 R0
SYMATTR InstName R1
SYMATTR Value 10K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage -656 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V5
SYMATTR Value PULSE(0 5 0 0 0 12.5µ 25µ)
SYMBOL voltage -656 -64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL res -320 -96 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res -240 -96 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res -320 272 R0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res -240 272 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL Opamps\\LT1078 272 80 R0
SYMATTR InstName U1
TEXT -736 520 Left 2 !.tran 0.0005 startup uic