Version 4
SHEET 1 2036 680
WIRE 64 -80 16 -80
WIRE 160 -80 64 -80
WIRE 240 -80 160 -80
WIRE 336 -80 240 -80
WIRE 64 -48 64 -80
WIRE 240 -48 240 -80
WIRE 336 -48 336 -80
WIRE 336 64 336 32
WIRE 240 112 240 32
WIRE 272 112 240 112
WIRE 688 128 640 128
WIRE 832 128 688 128
WIRE 1248 128 1200 128
WIRE 1392 128 1248 128
WIRE 928 176 768 176
WIRE 1488 176 1328 176
WIRE 1520 176 1488 176
WIRE 1632 176 1600 176
WIRE 336 192 336 160
WIRE 336 192 96 192
WIRE 384 192 336 192
WIRE 512 192 384 192
WIRE 688 208 688 128
WIRE 1248 208 1248 128
WIRE 1488 208 1488 176
WIRE 336 224 336 192
WIRE 160 240 160 -80
WIRE 96 256 96 192
WIRE 128 256 96 256
WIRE 240 272 240 112
WIRE 240 272 192 272
WIRE 272 272 240 272
WIRE 832 272 832 128
WIRE 1392 272 1392 128
WIRE 64 288 64 32
WIRE 128 288 64 288
WIRE 768 288 768 176
WIRE 800 288 768 288
WIRE 1328 288 1328 176
WIRE 1360 288 1328 288
WIRE 512 304 512 192
WIRE 928 304 928 176
WIRE 928 304 864 304
WIRE 976 304 928 304
WIRE 1072 304 976 304
WIRE 1488 304 1488 272
WIRE 1488 304 1424 304
WIRE 1520 304 1488 304
WIRE 1632 304 1632 176
WIRE 1632 304 1600 304
WIRE 1680 304 1632 304
WIRE 1776 304 1680 304
WIRE 688 320 688 288
WIRE 800 320 688 320
WIRE 1248 320 1248 288
WIRE 1360 320 1248 320
WIRE -112 352 -112 320
WIRE 64 352 64 288
WIRE 240 352 240 272
WIRE 336 352 336 320
WIRE 688 352 688 320
WIRE 1248 352 1248 320
WIRE 1072 368 1072 304
WIRE 1776 368 1776 304
WIRE -112 464 -112 432
WIRE 64 464 64 432
WIRE 160 464 160 304
WIRE 240 464 240 432
WIRE 336 464 336 432
WIRE 512 464 512 368
WIRE 688 464 688 432
WIRE 832 464 832 336
WIRE 1072 464 1072 432
WIRE 1248 464 1248 432
WIRE 1392 464 1392 336
WIRE 1776 464 1776 432
FLAG 160 464 0
FLAG -112 464 0
FLAG 64 464 0
FLAG 240 464 0
FLAG 336 464 0
FLAG 384 192 OUT1
FLAG 512 464 0
FLAG 1392 464 0
FLAG 1248 464 0
FLAG 1680 304 OUT3
FLAG 1776 464 0
FLAG -112 320 VCC
FLAG 16 -80 VCC
FLAG 1200 128 VCC
FLAG 832 464 0
FLAG 688 464 0
FLAG 976 304 OUT2
FLAG 1072 464 0
FLAG 640 128 VCC
SYMBOL Opamps\\opamp2 160 208 R0
SYMATTR InstName U1
SYMATTR Value TL081
SYMBOL pnp 272 320 M180
SYMATTR InstName Q1
SYMATTR Value BC327-40
SYMBOL npn 272 64 R0
SYMATTR InstName Q2
SYMATTR Value BC337-40
SYMBOL voltage -112 336 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 9
SYMBOL res 48 -64 R0
SYMATTR InstName R1
SYMATTR Value 470k
SYMBOL res 48 336 R0
SYMATTR InstName R2
SYMATTR Value 470k
SYMBOL res 224 -64 R0
SYMATTR InstName R3
SYMATTR Value 22k
SYMBOL res 320 -64 R0
SYMATTR InstName R5
SYMATTR Value 22
SYMBOL res 224 336 R0
SYMATTR InstName R4
SYMATTR Value 22k
SYMBOL res 320 336 R0
SYMATTR InstName R6
SYMATTR Value 22
SYMBOL cap 496 304 R0
SYMATTR InstName CL1
SYMATTR Value 400n
SYMATTR Value2 IC=0
SYMBOL Opamps\\opamp2 1392 240 R0
SYMATTR InstName U2
SYMATTR Value TL081
SYMBOL res 1232 192 R0
SYMATTR InstName R9
SYMATTR Value 470k
SYMBOL res 1232 336 R0
SYMATTR InstName R10
SYMATTR Value 470k
SYMBOL cap 1760 368 R0
SYMATTR InstName CL3
SYMATTR Value 400n
SYMATTR Value2 IC=0
SYMBOL cap 1504 272 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C3
SYMATTR Value 1n
SYMBOL res 1616 160 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 10k
SYMBOL res 1616 288 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R12
SYMATTR Value 4.7
SYMBOL Opamps\\opamp2 832 240 R0
SYMATTR InstName U3
SYMATTR Value TL081
SYMBOL res 672 192 R0
SYMATTR InstName R7
SYMATTR Value 470k
SYMBOL res 672 336 R0
SYMATTR InstName R8
SYMATTR Value 470k
SYMBOL cap 1056 368 R0
SYMATTR InstName CL2
SYMATTR Value 400n
SYMATTR Value2 IC=0
TEXT -136 232 Left 2 !.inc tl081.mod
TEXT -136 208 Left 2 !.tran 200u