* SPICE netlist
V1 +V 0 6.5
V2 0 -V 6.5
XU1 N020 N021 +V -V N021 TL072 ;pnba In+)In-)V+)V-)OUT
V3 N020 0 SINE(1 1 1k) AC 1
R1 N022 N021 2.05k
R2 N023 N022 1.02k
C1 N022 0 4.3n
R3 N022 N019 2.05k
C2 N019 N023 1.1n
XU2 N024 N023 +V -V N019 TL072 ;pnba In+)In-)V+)V-)OUT
XU3 N019 N017 +V -V N018 TL072 ;pnba In+)In-)V+)V-)OUT
R4 N017 N018 2.05k
R5 N015 N017 2.05k
R6 N015 N017 2.05k
R7 N015 N017 2.05k
XU4 N016 N015 +V -V N015 TL072 ;pnba In+)In-)V+)V-)OUT
R8 N016 0 2.05k
R9 N014 N016 2.05k
R10 N013 N014 2.05k
V4 N013 0 4
XU5 N007 N008 +V -V N008 TL072 ;pnba In+)In-)V+)V-)OUT
V5 N007 0 SINE(1 1 1k) AC 1
R11 N009 N008 2.05k
R12 N010 N009 1.02k
C3 N009 0 4.3n
R13 N009 N005 2.05k
C4 N005 N010 1.1n
XU6 0 N010 +V -V N005 TL072 ;pnba In+)In-)V+)V-)OUT
XU7 N012 N006 +V -V N011 TL072 ;pnba In+)In-)V+)V-)OUT
R14 N006 N011 2.05k
R15 N005 N006 2.05k
R16 N005 N006 2.05k
R17 N005 N006 2.05k
XU8 N004 N003 +V -V N003 TL072 ;pnba In+)In-)V+)V-)OUT
R18 N004 0 2.05k
R19 N002 N004 2.05k
R20 N001 N002 2.05k
V6 N001 0 4
R21 N005 N006 2.05k
V7 N024 0 1 AC 0
XU9 N031 N032 +V -V N032 TL072 ;pnba In+)In-)V+)V-)OUT
V8 N031 0 SINE(1 1 1k) AC 1
R22 N033 N032 2.05k
R23 N034 N033 1.02k
C5 N033 0 4.3n
R24 N033 N029 2.05k
C6 N029 N034 1.1n
XU10 N035 N034 +V -V N029 TL072 ;pnba In+)In-)V+)V-)OUT
XU11 N042 N030 +V -V N041 TL072 ;pnba In+)In-)V+)V-)OUT
R25 N030 N041 2.05k
R26 N029 N030 2.05k
R27 N029 N030 2.05k
R28 N029 N030 2.05k
V10 N035 0 1 AC 0
R29 N029 N030 2.05k
V9 N042 0 0.8 AC 0
R30 N026 N025 2.05k
R31 N027 N026 2.05k
R32 N028 N027 2.05k
R33 0 N028 2.05k
V11 N025 0 4.096 AC 0
R34 N037 N036 2.05k
R35 N038 N037 2.05k
R36 N039 N038 2.05k
R37 N040 N039 2.05k
V12 N036 0 4.096 AC 0
R38 0 N040 2.05k
.SUBCKT TL072 1 2 3 4 5
C1 11 12 3.498E-12
C2 6 7 15.00E-12
DC 5 53 DX
DE 54 5 DX
DLP 90 91 DX
DLN 92 90 DX
DP 4 3 DX
EGND 99 0 POLY(2) (3,0) (4,0) 0 .5 .5
FB 7 99 POLY(5) VB VC VE VLP VLN 0 4.715E6 -5E6 5E6 5E6 -5E6
GA 6 0 11 12 282.8E-6
GCM 0 6 10 99 8.942E-9
ISS 3 10 DC 195.0E-6
HLIM 90 0 VLIM 1K
J1 11 2 10 JX
J2 12 1 10 JX
R2 6 9 100.0E3
RD1 4 11 3.536E3
RD2 4 12 3.536E3
RO1 8 5 150
RO2 7 99 150
RP 3 4 2.143E3
RSS 10 99 1.026E6
VB 9 0 DC 0
VC 3 53 DC 2.200
VE 54 4 DC 2.200
VLIM 7 8 DC 0
VLP 91 0 DC 25
VLN 0 92 DC 25
.tran 10m

* LTspice schematic (.asc)
Version 4
SHEET 1 2784 3264
WIRE 688 -1632 544 -1632
WIRE 688 -1616 688 -1632
WIRE 544 -1568 544 -1632
WIRE 688 -1504 688 -1536
WIRE 944 -1504 816 -1504
WIRE 816 -1424 816 -1504
WIRE 832 -1424 816 -1424
WIRE 944 -1408 944 -1504
WIRE 944 -1408 896 -1408
WIRE 688 -1392 688 -1424
WIRE 832 -1392 688 -1392
WIRE 688 -1376 688 -1392
WIRE 416 -880 384 -880
WIRE 576 -880 496 -880
WIRE -80 -768 -240 -768
WIRE 160 -768 -80 -768
WIRE 384 -768 384 -880
WIRE 416 -768 384 -768
WIRE 576 -768 576 -880
WIRE 576 -768 496 -768
WIRE -240 -752 -240 -768
WIRE -80 -704 -80 -768
WIRE 384 -672 384 -768
WIRE 416 -672 384 -672
WIRE 576 -672 576 -768
WIRE 576 -672 496 -672
WIRE -800 -608 -992 -608
WIRE -672 -592 -736 -592
WIRE -352 -592 -672 -592
WIRE -240 -592 -240 -672
WIRE -240 -592 -272 -592
WIRE -208 -592 -240 -592
WIRE -80 -592 -80 -640
WIRE -80 -592 -128 -592
WIRE 32 -592 -80 -592
WIRE -800 -576 -832 -576
WIRE 160 -576 160 -768
WIRE 160 -576 96 -576
WIRE 384 -576 384 -672
WIRE 384 -576 160 -576
WIRE 416 -576 384 -576
WIRE 576 -576 576 -672
WIRE 576 -576 496 -576
WIRE 608 -576 576 -576
WIRE 752 -576 688 -576
WIRE 32 -560 -32 -560
WIRE -240 -528 -240 -592
WIRE -832 -496 -832 -576
WIRE -672 -496 -672 -592
WIRE -672 -496 -832 -496
WIRE -32 -496 -32 -560
WIRE -992 -480 -992 -608
WIRE 576 -448 576 -576
WIRE 624 -448 576 -448
WIRE -240 -432 -240 -464
WIRE -240 -432 -256 -432
WIRE 752 -432 752 -576
WIRE 752 -432 688 -432
WIRE 624 -416 576 -416
WIRE 576 -384 576 -416
WIRE -992 -368 -992 -400
WIRE -496 -240 -640 -240
WIRE -496 -224 -496 -240
WIRE -640 -176 -640 -240
WIRE -496 -112 -496 -144
WIRE -240 -112 -368 -112
WIRE -368 -32 -368 -112
WIRE -352 -32 -368 -32
WIRE -240 -16 -240 -112
WIRE -240 -16 -288 -16
WIRE 272 -16 -240 -16
WIRE -496 0 -496 -32
WIRE -352 0 -496 0
WIRE 272 0 272 -16
WIRE 304 0 272 0
WIRE 464 0 384 0
WIRE -496 16 -496 0
WIRE 272 96 272 0
WIRE 304 96 272 96
WIRE 464 96 464 0
WIRE 464 96 384 96
WIRE 272 192 272 96
WIRE 304 192 272 192
WIRE 464 192 464 96
WIRE 464 192 384 192
WIRE 496 192 464 192
WIRE 640 192 576 192
WIRE -96 208 -256 208
WIRE 144 208 -96 208
WIRE -256 224 -256 208
WIRE -96 272 -96 208
WIRE 464 320 464 192
WIRE 512 320 464 320
WIRE 640 336 640 192
WIRE 640 336 576 336
WIRE 512 352 464 352
WIRE -816 368 -1008 368
WIRE -688 384 -752 384
WIRE -368 384 -688 384
WIRE -256 384 -256 304
WIRE -256 384 -288 384
WIRE -224 384 -256 384
WIRE -96 384 -96 336
WIRE -96 384 -144 384
WIRE 16 384 -96 384
WIRE -816 400 -848 400
WIRE 144 400 144 208
WIRE 144 400 80 400
WIRE 464 400 464 352
WIRE 464 400 144 400
WIRE 16 416 -48 416
WIRE -256 448 -256 384
WIRE -848 480 -848 400
WIRE -688 480 -688 384
WIRE -688 480 -848 480
WIRE -48 480 -48 416
WIRE -1008 496 -1008 368
WIRE -256 544 -256 512
WIRE -256 544 -272 544
WIRE -1008 608 -1008 576
WIRE -1296 656 -1296 624
WIRE -1296 656 -1392 656
WIRE -1392 688 -1392 656
WIRE -1296 688 -1296 656
WIRE 768 1040 656 1040
WIRE 896 1040 848 1040
WIRE 1024 1040 976 1040
WIRE 1168 1040 1104 1040
WIRE 1280 1040 1248 1040
WIRE -160 1088 -320 1088
WIRE 80 1088 -160 1088
WIRE 192 1088 160 1088
WIRE 352 1088 272 1088
WIRE -320 1104 -320 1088
WIRE 656 1104 656 1040
WIRE 1280 1104 1280 1040
WIRE -160 1152 -160 1088
WIRE 160 1184 160 1088
WIRE 192 1184 160 1184
WIRE 352 1184 352 1088
WIRE 352 1184 272 1184
WIRE -880 1248 -1072 1248
WIRE -752 1264 -816 1264
WIRE -432 1264 -752 1264
WIRE -320 1264 -320 1184
WIRE -320 1264 -352 1264
WIRE -288 1264 -320 1264
WIRE -160 1264 -160 1216
WIRE -160 1264 -208 1264
WIRE -48 1264 -160 1264
WIRE -880 1280 -912 1280
WIRE 80 1280 80 1088
WIRE 80 1280 16 1280
WIRE 160 1280 160 1184
WIRE 160 1280 80 1280
WIRE 192 1280 160 1280
WIRE 352 1280 352 1184
WIRE 352 1280 272 1280
WIRE -48 1296 -112 1296
WIRE 768 1296 656 1296
WIRE 896 1296 848 1296
WIRE 1024 1296 976 1296
WIRE 1168 1296 1104 1296
WIRE 1280 1296 1248 1296
WIRE 1376 1296 1360 1296
WIRE 1392 1296 1376 1296
WIRE -320 1328 -320 1264
WIRE -912 1360 -912 1280
WIRE -752 1360 -752 1264
WIRE -752 1360 -912 1360
WIRE -112 1360 -112 1296
WIRE 656 1360 656 1296
WIRE 1376 1360 1376 1296
WIRE -1072 1376 -1072 1248
WIRE 160 1376 160 1280
WIRE 192 1376 160 1376
WIRE 352 1376 352 1280
WIRE 352 1376 272 1376
WIRE 384 1376 352 1376
WIRE 528 1376 464 1376
WIRE -320 1424 -320 1392
WIRE -320 1424 -336 1424
WIRE -1072 1488 -1072 1456
WIRE 352 1504 352 1376
WIRE 400 1504 352 1504
WIRE 528 1520 528 1376
WIRE 528 1520 464 1520
WIRE 400 1536 288 1536
WIRE 288 1552 288 1536
FLAG -1392 688 0
FLAG -1296 544 +V
FLAG -1296 768 -V
FLAG -784 416 +V
FLAG -784 352 -V
FLAG 48 368 +V
FLAG 48 432 -V
FLAG -1008 608 0
FLAG -256 544 0
FLAG 544 304 +V
FLAG 544 368 -V
FLAG -320 -48 +V
FLAG -320 16 -V
FLAG -496 96 0
FLAG -640 -96 0
FLAG -768 -560 +V
FLAG -768 -624 -V
FLAG 64 -608 +V
FLAG 64 -544 -V
FLAG -992 -368 0
FLAG -240 -432 0
FLAG 656 -464 +V
FLAG 656 -400 -V
FLAG 864 -1440 +V
FLAG 864 -1376 -V
FLAG 688 -1296 0
FLAG 544 -1488 0
FLAG -48 560 0
FLAG -32 -496 0
FLAG -848 1296 +V
FLAG -848 1232 -V
FLAG -16 1248 +V
FLAG -16 1312 -V
FLAG -1072 1488 0
FLAG -320 1424 0
FLAG 432 1488 +V
FLAG 432 1552 -V
FLAG -112 1440 0
FLAG 288 1632 0
FLAG 1280 1104 0
FLAG 656 1184 0
FLAG 656 1440 0
FLAG 1376 1360 0
SYMBOL voltage -1296 528 R0
SYMATTR InstName V1
SYMATTR Value 6.5
SYMBOL voltage -1296 672 R0
SYMATTR InstName V2
SYMATTR Value 6.5
SYMBOL OpAmps\\opamp2 -784 448 M180
SYMATTR InstName U1
SYMATTR Value TL072
SYMBOL voltage -1008 480 R0
SYMATTR Value2 AC 1
SYMATTR InstName V3
SYMATTR Value SINE(1 1 1k)
SYMBOL res -272 368 R90
SYMATTR InstName R1
SYMATTR Value 2.05k
SYMBOL res -128 368 R90
SYMATTR InstName R2
SYMATTR Value 1.02k
SYMBOL cap -272 448 R0
SYMATTR InstName C1
SYMATTR Value 4.3n
SYMBOL res -240 320 R180
SYMATTR InstName R3
SYMATTR Value 2.05k
SYMBOL cap -112 272 R0
SYMATTR InstName C2
SYMATTR Value 1.1n
SYMBOL OpAmps\\opamp2 48 336 R0
SYMATTR InstName U2
SYMATTR Value TL072
SYMBOL OpAmps\\opamp2 544 272 R0
SYMATTR InstName U3
SYMATTR Value TL072
SYMBOL res 480 208 R270
SYMATTR InstName R4
SYMATTR Value 2.05k
SYMBOL res 288 208 R270
SYMATTR InstName R5
SYMATTR Value 2.05k
SYMBOL res 288 112 R270
SYMATTR InstName R6
SYMATTR Value 2.05k
SYMBOL res 288 16 R270
SYMATTR InstName R7
SYMATTR Value 2.05k
SYMBOL OpAmps\\opamp2 -320 -80 R0
SYMATTR InstName U4
SYMATTR Value TL072
SYMBOL res -512 0 R0
SYMATTR InstName R8
SYMATTR Value 2.05k
SYMBOL res -512 -128 R0
SYMATTR InstName R9
SYMATTR Value 2.05k
SYMBOL res -512 -240 R0
SYMATTR InstName R10
SYMATTR Value 2.05k
SYMBOL voltage -640 -192 R0
SYMATTR InstName V4
SYMATTR Value 4
SYMBOL OpAmps\\opamp2 -768 -528 M180
SYMATTR InstName U5
SYMATTR Value TL072
SYMBOL voltage -992 -496 R0
SYMATTR Value2 AC 1
SYMATTR InstName V5
SYMATTR Value SINE(1 1 1k)
SYMBOL res -256 -608 R90
SYMATTR InstName R11
SYMATTR Value 2.05k
SYMBOL res -112 -608 R90
SYMATTR InstName R12
SYMATTR Value 1.02k
SYMBOL cap -256 -528 R0
SYMATTR InstName C3
SYMATTR Value 4.3n
SYMBOL res -224 -656 R180
SYMATTR InstName R13
SYMATTR Value 2.05k
SYMBOL cap -96 -704 R0
SYMATTR InstName C4
SYMATTR Value 1.1n
SYMBOL OpAmps\\opamp2 64 -640 R0
SYMATTR InstName U6
SYMATTR Value TL072
SYMBOL OpAmps\\opamp2 656 -496 R0
SYMATTR InstName U7
SYMATTR Value TL072
SYMBOL res 592 -560 R270
SYMATTR InstName R14
SYMATTR Value 2.05k
SYMBOL res 400 -560 R270
SYMATTR InstName R15
SYMATTR Value 2.05k
SYMBOL res 400 -656 R270
SYMATTR InstName R16
SYMATTR Value 2.05k
SYMBOL res 400 -752 R270
SYMATTR InstName R17
SYMATTR Value 2.05k
SYMBOL OpAmps\\opamp2 864 -1472 R0
SYMATTR InstName U8
SYMATTR Value TL072
SYMBOL res 672 -1392 R0
SYMATTR InstName R18
SYMATTR Value 2.05k
SYMBOL res 672 -1520 R0
SYMATTR InstName R19
SYMATTR Value 2.05k
SYMBOL res 672 -1632 R0
SYMATTR InstName R20
SYMATTR Value 2.05k
SYMBOL voltage 544 -1584 R0
SYMATTR InstName V6
SYMATTR Value 4
SYMBOL res 400 -864 R270
SYMATTR InstName R21
SYMATTR Value 2.05k
SYMBOL voltage -48 464 R0
SYMATTR Value2 AC 0
SYMATTR InstName V7
SYMATTR Value 1
SYMBOL OpAmps\\opamp2 -848 1328 M180
SYMATTR InstName U9
SYMATTR Value TL072
SYMBOL voltage -1072 1360 R0
SYMATTR Value2 AC 1
SYMATTR InstName V8
SYMATTR Value SINE(1 1 1k)
SYMBOL res -336 1248 R90
SYMATTR InstName R22
SYMATTR Value 2.05k
SYMBOL res -192 1248 R90
SYMATTR InstName R23
SYMATTR Value 1.02k
SYMBOL cap -336 1328 R0
SYMATTR InstName C5
SYMATTR Value 4.3n
SYMBOL res -304 1200 R180
SYMATTR InstName R24
SYMATTR Value 2.05k
SYMBOL cap -176 1152 R0
SYMATTR InstName C6
SYMATTR Value 1.1n
SYMBOL OpAmps\\opamp2 -16 1216 R0
SYMATTR InstName U10
SYMATTR Value TL072
SYMBOL OpAmps\\opamp2 432 1456 R0
SYMATTR InstName U11
SYMATTR Value TL072
SYMBOL res 368 1392 R270
SYMATTR InstName R25
SYMATTR Value 2.05k
SYMBOL res 176 1392 R270
SYMATTR InstName R26
SYMATTR Value 2.05k
SYMBOL res 176 1296 R270
SYMATTR InstName R27
SYMATTR Value 2.05k
SYMBOL res 176 1200 R270
SYMATTR InstName R28
SYMATTR Value 2.05k
SYMBOL voltage -112 1344 R0
SYMATTR Value2 AC 0
SYMATTR InstName V10
SYMATTR Value 1
SYMBOL res 176 1104 R270
SYMATTR InstName R29
SYMATTR Value 2.05k
SYMBOL voltage 288 1536 R0
SYMATTR Value2 AC 0
SYMATTR InstName V9
SYMATTR Value 0.8
SYMBOL res 864 1024 R90
SYMATTR InstName R30
SYMATTR Value 2.05k
SYMBOL res 992 1024 R90
SYMATTR InstName R31
SYMATTR Value 2.05k
SYMBOL res 1120 1024 R90
SYMATTR InstName R32
SYMATTR Value 2.05k
SYMBOL res 1264 1024 R90
SYMATTR InstName R33
SYMATTR Value 2.05k
SYMBOL voltage 656 1088 R0
SYMATTR Value2 AC 0
SYMATTR InstName V11
SYMATTR Value 4.096
SYMBOL res 864 1280 R90
SYMATTR InstName R34
SYMATTR Value 2.05k
SYMBOL res 992 1280 R90
SYMATTR InstName R35
SYMATTR Value 2.05k
SYMBOL res 1120 1280 R90
SYMATTR InstName R36
SYMATTR Value 2.05k
SYMBOL res 1264 1280 R90
SYMATTR InstName R37
SYMATTR Value 2.05k
SYMBOL voltage 656 1344 R0
SYMATTR Value2 AC 0
SYMATTR InstName V12
SYMATTR Value 4.096
SYMBOL res 1376 1280 R90
SYMATTR InstName R38
SYMATTR Value 2.05k