Version 4
SHEET 1 880 680
WIRE -672 -96 -736 -96
WIRE -736 -64 -736 -96
WIRE -672 -48 -672 -96
WIRE -576 -48 -576 -64
WIRE -576 -48 -672 -48
WIRE -576 -16 -576 -48
WIRE -736 32 -736 16
WIRE -640 32 -736 32
WIRE 208 32 64 32
WIRE -736 48 -736 32
WIRE 416 64 368 64
WIRE 528 64 496 64
WIRE -576 96 -576 80
WIRE -496 96 -576 96
WIRE -576 112 -576 96
WIRE -496 112 -496 96
WIRE -736 128 -736 112
WIRE 64 160 64 32
WIRE 96 160 64 160
WIRE 208 176 208 32
WIRE 208 176 160 176
WIRE 240 176 208 176
WIRE 368 176 368 64
WIRE 368 176 320 176
WIRE 432 176 368 176
WIRE -224 192 -256 192
WIRE -144 192 -160 192
WIRE -32 192 -80 192
WIRE 48 192 -32 192
WIRE 96 192 48 192
WIRE 528 192 528 64
WIRE 528 192 496 192
WIRE -32 208 -32 192
WIRE 48 208 48 192
WIRE 320 208 256 208
WIRE 400 208 320 208
WIRE 432 208 400 208
WIRE -736 224 -736 192
WIRE -736 224 -912 224
WIRE -576 240 -576 192
WIRE -496 240 -496 176
WIRE -496 240 -576 240
WIRE -256 240 -256 192
WIRE -256 240 -496 240
WIRE 400 240 400 208
WIRE -736 256 -736 224
WIRE 320 256 320 208
WIRE -576 272 -576 240
WIRE -496 288 -496 240
WIRE -912 336 -912 224
WIRE -736 336 -736 320
WIRE -256 352 -256 240
WIRE -224 352 -256 352
WIRE 256 352 256 208
WIRE 256 352 -160 352
WIRE -576 368 -576 352
WIRE -496 368 -496 352
WIRE -496 368 -576 368
WIRE -576 384 -576 368
WIRE -736 432 -736 400
WIRE -640 432 -736 432
WIRE -736 464 -736 432
WIRE -576 512 -576 480
WIRE -576 512 -672 512
WIRE -576 528 -576 512
WIRE -736 576 -736 544
WIRE -672 576 -672 512
WIRE -672 576 -736 576
FLAG 128 144 +12v
FLAG 464 160 +12v
FLAG 128 208 -12v
FLAG 464 224 -12v
FLAG -32 272 0
FLAG 48 288 0
FLAG 320 320 0
FLAG 400 320 0
FLAG -320 -176 +12v
FLAG -192 -176 -12v
FLAG -320 -96 0
FLAG -192 -96 0
FLAG -912 416 0
FLAG -576 -64 +12v
FLAG -576 528 -12v
SYMBOL Opamps\\opamp2 128 112 R0
SYMATTR InstName U1
SYMATTR Value ""
SYMATTR SpiceModel TL084
SYMBOL Opamps\\opamp2 464 128 R0
SYMATTR InstName U2
SYMATTR Value ""
SYMATTR SpiceModel TL084
SYMBOL res 512 48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL res 336 160 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 -59 51 VTop 0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL res 64 304 R180
WINDOW 0 36 76 Left 0
WINDOW 3 -64 33 Left 0
SYMATTR InstName R3
SYMATTR Value 1Meg
SYMBOL res 416 336 R180
WINDOW 0 36 76 Left 0
WINDOW 3 -72 45 Left 0
SYMATTR InstName R4
SYMATTR Value 1Meg
SYMBOL cap 304 256 R0
WINDOW 3 -43 32 Left 0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL cap -48 208 R0
WINDOW 3 -55 47 Left 0
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL schottky -144 208 R270
WINDOW 0 32 32 VTop 0
WINDOW 3 0 32 VBottom 0
SYMATTR InstName D1
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -224 208 R270
WINDOW 0 32 32 VTop 0
WINDOW 3 0 32 VBottom 0
SYMATTR InstName D2
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -224 368 R270
WINDOW 0 32 32 VTop 0
WINDOW 3 0 32 VBottom 0
SYMATTR InstName D3
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL voltage -320 -192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value +12v
SYMBOL voltage -192 -192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value -12v
SYMBOL voltage -912 320 R0
WINDOW 3 -246 -143 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 -246 -115 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(0 2 0 1nS 1nS 1uS 99uS)
SYMATTR SpiceLine Rser=400
SYMBOL res -592 96 R0
SYMATTR InstName R5
SYMATTR Value 68
SYMBOL res -592 256 R0
SYMATTR InstName R6
SYMATTR Value 68
SYMBOL cap -512 112 R0
SYMATTR InstName C3
SYMATTR Value 100n
SYMBOL cap -512 288 R0
SYMATTR InstName C4
SYMATTR Value 100n
SYMBOL npn -640 -16 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL pnp -640 480 M180
SYMATTR InstName Q2
SYMATTR Value BC556B
SYMBOL diode -752 48 R0
WINDOW 3 49 34 Left 0
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL diode -752 128 R0
WINDOW 3 51 32 Left 0
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL diode -752 256 R0
WINDOW 3 56 34 Left 0
SYMATTR InstName D6
SYMATTR Value 1N4148
SYMBOL diode -752 336 R0
WINDOW 3 49 31 Left 0
SYMATTR InstName D7
SYMATTR Value 1N4148
SYMBOL res -752 -80 R0
SYMATTR InstName R7
SYMATTR Value 4K7
SYMBOL res -752 448 R0
SYMATTR InstName R8
SYMATTR Value 4K7
TEXT -472 -8 Left 0 !.INC TL084.MOD
TEXT -472 32 Left 0 !.tran 0 1000uS 0