* SPICE netlist
XU1 0 N006 18V+ 18V- N001 OP37 ;pnba In+)In-)V+)V-)OUT
XU2 0 N007 18V+ 18V- N002 OP37 ;pnba In+)In-)V+)V-)OUT
V1 N010 0 SINE(0 707m 40k) AC 1
V2 18V+ 0 18
V3 0 18V- 18
R1 N006 N005 1k
R2 N001 N006 100k
R3 N007 N001 300
rr1 N002 N007 3k
R4 N004 0 5k
R5 0 N003 100k
XU3 N010 N009 18V+ 18V- N008 OP27 ;pnba In+)In-)V+)V-)OUT
C2 N004 N005 100n
C3 N002 N003 100n
XU4 N004 N008 N004 opamp Aol=100K GBW=10Meg ;pnba invin)noninvin)out
R7 N004 N009 190k
R8 N009 0 10k
R9 N010 0 10k
.tran 0 10.25m 10m

* LTspice schematic (.asc)
Version 4
SHEET 1 1264 1200
WIRE 120 -552 8 -552
WIRE 248 -552 120 -552
WIRE 8 -536 8 -552
WIRE 248 -536 248 -552
WIRE -56 -520 -56 -584
WIRE -24 -520 -56 -520
WIRE 200 -520 200 -600
WIRE 216 -520 200 -520
WIRE 56 -504 40 -504
WIRE 120 -504 56 -504
WIRE 344 -504 280 -504
WIRE 376 -504 344 -504
WIRE 488 -504 440 -504
WIRE -456 -488 -536 -488
WIRE -312 -488 -376 -488
WIRE -248 -488 -312 -488
WIRE -136 -488 -184 -488
WIRE -40 -488 -56 -488
WIRE -24 -488 -40 -488
WIRE 120 -488 120 -504
WIRE 216 -488 200 -488
WIRE 8 -440 8 -472
WIRE 120 -440 8 -440
WIRE 248 -440 248 -472
WIRE 248 -440 120 -440
WIRE -40 -392 -40 -488
WIRE -24 -392 -40 -392
WIRE 56 -392 56 -504
WIRE 200 -376 200 -488
WIRE 216 -376 200 -376
WIRE 344 -376 344 -504
WIRE 344 -376 296 -376
WIRE -392 -200 -536 -200
WIRE -312 -200 -312 -488
WIRE -312 -200 -392 -200
WIRE -312 -136 -312 -200
WIRE 488 -104 488 -120
WIRE -392 -56 -392 -200
WIRE -328 -56 -328 -72
WIRE -328 -56 -392 -56
WIRE -536 8 -536 -200
WIRE -296 8 -296 -72
WIRE -296 8 -328 8
WIRE 632 24 632 -24
WIRE -536 104 -536 88
WIRE -536 104 -552 104
WIRE -328 152 -328 8
WIRE -536 264 -536 104
WIRE -344 264 -344 216
WIRE -344 264 -536 264
WIRE -312 280 -312 216
WIRE -296 280 -312 280
WIRE -312 504 -312 280
WIRE -296 504 -312 504
WIRE -296 520 -296 504
FLAG 488 -24 0
FLAG 632 -104 0
FLAG 488 -120 18V+
FLAG 120 -552 18V-
FLAG 120 -440 18V+
FLAG 632 24 18V-
FLAG -296 600 0
FLAG 200 -600 0
FLAG -56 -584 0
FLAG 568 -504 0
FLAG -360 184 18V+
FLAG -296 184 18V-
FLAG -216 280 0
FLAG -632 104 0
FLAG -536 -488 0
DATAFLAG -96 -16 ""
SYMBOL OpAmps\\OP37 8 -440 M180
SYMATTR InstName U1
SYMBOL OpAmps\\OP37 248 -440 M180
SYMATTR InstName U2
SYMBOL voltage -296 504 R0
SYMATTR InstName V1
SYMATTR Value SINE(0 707m 40k)
SYMATTR Value2 AC 1
SYMBOL voltage 488 -120 R0
SYMATTR InstName V2
SYMATTR Value 18
SYMBOL voltage 632 -120 R0
SYMATTR InstName V3
SYMATTR Value 18
SYMBOL res -40 -504 R90
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 72 -408 R90
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL res 216 -504 R90
SYMATTR InstName R3
SYMATTR Value 300
SYMBOL res 312 -392 R90
SYMATTR InstName rr1
SYMATTR Value 3k
SYMBOL res -360 -504 R90
SYMATTR InstName R4
SYMATTR Value 5k
SYMBOL res 584 -520 R90
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL OpAmps\\OP27 -392 184 R270
SYMATTR InstName U3
SYMBOL cap -248 -472 R270
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL cap 376 -488 R270
SYMATTR InstName C3
SYMATTR Value 100n
SYMBOL OpAmps\\opamp -376 -104 R270
SYMATTR InstName U4
SYMBOL res -552 -8 R0
SYMATTR InstName R7
SYMATTR Value 190k
SYMBOL res -536 88 R90
SYMATTR InstName R8
SYMATTR Value 10k
SYMBOL res -312 296 R270
SYMATTR InstName R9
SYMATTR Value 10k