* SPICE netlist
V1 Vin N011 SINE(0 1m 1)
V2 VSP 0 5
V3 0 VSN 5
R1 N001 N009 220
R2 N002 N001 12k
R3 N010 N009 12k
XU1 Vin N001 VSP VSN N002 level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
XU2 N011 N009 VSP VSN N010 level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R4 N005 N002 10k
R5 N003 N005 10k
R6 N007 N010 10k
R7 0 N007 10k
XU3 N007 N005 VSP VSN N003 level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R8 N008 N003 39k
R9 N006 N008 39k
C1 N008 Vout 100n
C2 N006 0 100n
XU4 N006 N004 VSP VSN Vout level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R10 N004 0 20k
R11 Vout N004 10k
R12 N011 0 10k
.dc V1 -80m 80m 1m

* LTspice schematic (.asc)
Version 4
SHEET 1 1552 752
WIRE -56 -360 -72 -360
WIRE 56 -344 8 -344
WIRE -56 -328 -408 -328
WIRE 56 -296 56 -344
WIRE 120 -296 56 -296
WIRE 312 -296 280 -296
WIRE 552 -296 536 -296
WIRE 744 -296 712 -296
WIRE 536 -264 536 -296
WIRE -584 -248 -680 -248
WIRE -680 -200 -680 -248
WIRE -72 -136 -72 -360
WIRE 56 -136 56 -296
WIRE 56 -136 8 -136
WIRE -408 -72 -408 -328
WIRE -72 -72 -72 -136
WIRE 632 -72 632 -296
WIRE 648 -72 632 -72
WIRE 200 -56 200 -296
WIRE 216 -56 200 -56
WIRE 744 -56 744 -296
WIRE 744 -56 712 -56
WIRE 776 -56 744 -56
WIRE -680 -40 -680 -120
WIRE -680 -40 -776 -40
WIRE 312 -40 312 -296
WIRE 312 -40 280 -40
WIRE 344 -40 312 -40
WIRE 648 -40 504 -40
WIRE 216 -24 200 -24
WIRE -776 -8 -776 -40
WIRE -680 24 -680 -40
WIRE 424 56 424 -40
WIRE 504 56 504 -40
WIRE -72 72 -72 8
WIRE 56 72 8 72
WIRE -680 152 -680 104
WIRE -584 152 -680 152
WIRE 56 152 56 72
WIRE 120 152 56 152
WIRE 200 152 200 -24
WIRE 312 152 280 152
WIRE 504 152 504 120
WIRE 312 200 312 152
WIRE -72 216 -72 72
WIRE -56 216 -72 216
WIRE 424 216 424 120
WIRE 744 216 744 -56
WIRE 744 216 424 216
WIRE 56 232 56 152
WIRE 56 232 8 232
WIRE -408 248 -408 8
WIRE -56 248 -408 248
WIRE -408 264 -408 248
WIRE -408 376 -408 344
FLAG -776 -8 0
FLAG -584 -248 VSP
FLAG -584 152 VSN
FLAG 312 200 0
FLAG 504 152 0
FLAG 536 -264 0
FLAG -408 376 0
FLAG -24 -376 VSP
FLAG -24 200 VSP
FLAG 248 -72 VSP
FLAG 680 -88 VSP
FLAG -24 -312 VSN
FLAG -24 264 VSN
FLAG 248 -8 VSN
FLAG 680 -24 VSN
FLAG 776 -56 Vout
FLAG -408 -328 Vin
SYMBOL voltage -408 -88 R0
SYMATTR InstName V1
SYMATTR Value SINE(0 1m 1)
SYMBOL voltage -680 -216 R0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage -680 8 R0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL res -56 -88 M0
SYMATTR InstName R1
SYMATTR Value 220
SYMBOL res 24 -152 R90
SYMATTR InstName R2
SYMATTR Value 12k
SYMBOL res 24 56 R90
SYMATTR InstName R3
SYMATTR Value 12k
SYMBOL OpAmps\\UniversalOpAmp2 -24 -344 R0
SYMATTR InstName U1
SYMBOL OpAmps\\UniversalOpAmp2 -24 232 R0
SYMATTR InstName U2
SYMBOL res 216 -312 R90
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 296 -312 R90
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 216 136 R90
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res 296 136 R90
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL OpAmps\\UniversalOpAmp2 248 -40 R0
SYMATTR InstName U3
SYMBOL res 440 -56 R90
SYMATTR InstName R8
SYMATTR Value 39k
SYMBOL res 520 -56 R90
SYMATTR InstName R9
SYMATTR Value 39k
SYMBOL cap 408 56 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 488 56 R0
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL OpAmps\\UniversalOpAmp2 680 -56 R0
SYMATTR InstName U4
SYMBOL res 648 -312 R90
SYMATTR InstName R10
SYMATTR Value 20k
SYMBOL res 728 -312 R90
SYMATTR InstName R11
SYMATTR Value 10k
SYMBOL res -424 248 R0
SYMATTR InstName R12
SYMATTR Value 10k