Version 4.1
SHEET 1 2020 920
WIRE -272 -128 -272 -160
WIRE -144 -128 -144 -160
WIRE 1952 -80 1152 -80
WIRE 160 -64 0 -64
WIRE 320 -64 240 -64
WIRE 1152 -64 1152 -80
WIRE 1120 -16 1008 -16
WIRE 1312 -16 1216 -16
WIRE 1696 48 1504 48
WIRE 1952 48 1952 -80
WIRE 1952 48 1760 48
WIRE -272 80 -272 32
WIRE 1008 80 1008 -16
WIRE 1136 80 1008 80
WIRE 1312 80 1312 -16
WIRE 1312 80 1200 80
WIRE 176 128 176 80
WIRE 80 160 48 160
WIRE 48 176 48 160
WIRE 80 176 80 160
WIRE 96 176 80 176
WIRE 320 192 320 -64
WIRE 320 192 288 192
WIRE -144 208 -224 208
WIRE 0 208 0 -64
WIRE 0 208 -64 208
WIRE 96 208 0 208
WIRE 672 208 672 176
WIRE 1648 224 1648 176
WIRE -224 240 -224 208
WIRE 1184 240 1184 208
WIRE 1088 272 1056 272
WIRE 320 288 320 192
WIRE 1056 288 1056 272
WIRE 1088 288 1088 272
WIRE 1104 288 1088 288
WIRE 1312 304 1312 80
WIRE 1312 304 1296 304
WIRE 1392 304 1312 304
WIRE 1504 304 1504 48
WIRE 1504 304 1472 304
WIRE 1552 304 1504 304
WIRE 1952 304 1952 48
WIRE 1952 304 1808 304
WIRE 672 320 672 288
WIRE 672 320 464 320
WIRE 1008 320 1008 80
WIRE 1008 320 832 320
WIRE 1104 320 1008 320
WIRE 1952 320 1952 304
WIRE 176 336 176 256
WIRE 1552 336 1504 336
WIRE 1888 336 1808 336
WIRE 672 368 672 320
WIRE 832 368 832 320
WIRE 1184 400 1184 368
WIRE 1504 400 1504 336
WIRE 320 416 320 368
WIRE 608 416 320 416
WIRE 912 416 896 416
WIRE 912 432 912 416
WIRE 320 448 320 416
WIRE 1648 448 1648 416
WIRE 1888 448 1888 336
WIRE 1888 448 1648 448
WIRE 752 464 672 464
WIRE 832 464 752 464
WIRE 752 496 752 464
WIRE 640 560 640 544
WIRE 1648 560 1648 448
WIRE 544 592 512 592
WIRE 512 608 512 592
WIRE 544 608 544 592
WIRE 560 608 544 608
WIRE 752 624 752 576
WIRE 464 640 464 320
WIRE 560 640 464 640
WIRE 640 768 640 688
FLAG 320 528 0
FLAG 48 176 0
FLAG -272 -48 0
FLAG -144 -48 0
FLAG -272 -160 +15V
FLAG -144 -160 -15V
FLAG 176 80 +15V
FLAG 176 336 -15V
FLAG 672 176 +15V
FLAG 912 432 0
FLAG 512 608 0
FLAG 1056 288 0
FLAG 640 544 +15V
FLAG 640 768 -15V
FLAG 1184 208 +15V
FLAG 1184 400 -15V
FLAG -272 32 +5V
FLAG -272 160 0
FLAG 1504 400 +5V
FLAG 1648 176 +15V
FLAG 1648 560 -15V
FLAG 1952 400 0
FLAG -224 320 0
SYMBOL res -48 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL res 256 -80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 2k2
SYMBOL res 336 384 R180
WINDOW 0 -35 65 Left 2
WINDOW 3 -44 33 Left 2
SYMATTR InstName R3
SYMATTR Value 100
SYMBOL res 304 432 R0
SYMATTR InstName R4
SYMATTR Value 270
SYMBOL res 656 192 R0
SYMATTR InstName R5
SYMATTR Value 3Meg
SYMBOL voltage -272 -144 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -144 -144 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value -15
SYMBOL res 736 480 R0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL cap 1200 64 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL res 1488 288 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 47k
SYMBOL voltage -272 64 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL cap 1760 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 10p
SYMBOL res 1936 304 R0
SYMATTR InstName R8
SYMATTR Value 2k2
SYMBOL voltage -224 224 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value 1
SYMBOL njf 1216 -64 R90
WINDOW 0 29 -12 VRight 2
WINDOW 3 23 85 VRight 2
SYMATTR InstName J1
SYMATTR Value 2N4391
SYMBOL OpAmps\\LMX58_LM2904 160 192 R0
SYMATTR InstName U1
SYMBOL OpAmps\\LMX58_LM2904 624 624 R0
SYMATTR InstName U2
SYMBOL OpAmps\\TL082 1216 304 R0
SYMATTR InstName U3
SYMBOL OpAmps\\LM311 1616 336 R0
SYMATTR InstName U4
SYMBOL npn 608 368 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL npn 896 368 M0
SYMATTR InstName Q2
SYMATTR Value BC547B
TEXT -528 872 Left 2 !.tran 0 0.002 0 1 startup uic