Version 4
SHEET 1 2388 3980
WIRE -48 64 -96 64
WIRE 64 64 32 64
WIRE 160 64 64 64
WIRE 384 64 240 64
WIRE -96 80 -96 64
WIRE 288 160 288 128
WIRE 128 176 128 160
WIRE 64 192 64 64
WIRE 96 192 64 192
WIRE 240 208 160 208
WIRE 384 208 384 64
WIRE 384 208 336 208
WIRE 464 208 384 208
WIRE 544 208 464 208
WIRE -112 224 -208 224
WIRE 96 224 -32 224
WIRE 128 256 128 240
WIRE 544 256 544 208
WIRE 256 272 256 256
WIRE -208 288 -208 224
WIRE 288 288 288 256
WIRE 544 384 544 336
WIRE -208 400 -208 368
WIRE -208 512 -208 496
WIRE -64 512 -64 496
WIRE 160 512 160 496
WIRE 304 512 304 496
WIRE -208 608 -208 592
WIRE -64 608 -64 592
WIRE 160 608 160 592
WIRE 304 608 304 592
FLAG 544 384 0
FLAG -96 80 0
FLAG -208 608 0
FLAG -208 400 0
FLAG 464 208 out
FLAG 256 272 0
FLAG -208 496 +V1
FLAG 128 160 +V1
FLAG -64 608 0
FLAG -64 496 -V1
FLAG 128 256 -V1
FLAG 288 128 +V2
FLAG 288 288 -V2
FLAG 160 608 0
FLAG 160 496 +V2
FLAG 304 608 0
FLAG 304 496 -V2
SYMBOL res 528 240 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 144 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res -64 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 2.5k
SYMBOL res -128 240 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 100
SYMBOL voltage -208 496 R0
SYMATTR InstName V1P
SYMATTR Value 15V
SYMBOL voltage -208 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(-2 2 0 10n 10n 5u 10u 2)
SYMBOL xopps 288 208 R0
WINDOW 3 16 89 Left 2
SYMATTR Value IQ=3m
SYMATTR InstName U1ps
SYMBOL Opamps\\opamp2 128 144 R0
SYMATTR InstName U3
SYMATTR Value TL072
SYMBOL voltage -64 496 R0
SYMATTR InstName V1
SYMATTR Value -15
SYMBOL voltage 160 496 R0
SYMATTR InstName V2
SYMATTR Value 15V
SYMBOL voltage 304 496 R0
SYMATTR InstName V4
SYMATTR Value -15
TEXT -248 -56 Left 2 !.tran 30u
TEXT 112 -56 Left 2 !.lib xopps.sub
TEXT -88 -56 Left 2 !.lib TL072.301