* SPICE netlist
I1 0 N006 SINE(2.132m {Iac} 1000) AC 1
I2 0 N008 SINE(2.132m {Iac} 1000 0 0 180) AC 1 180
V1 VCC 0 12V
V2 0 VEE 12V
R1 N002 N006 1.21k
R2 N004 N008 1.21k
C1 N004 N008 1.2n
C2 N002 N006 1.2n
R3 N005 N002 681
R4 plus N005 232
XU5 0 N006 VCC VEE N002 OPA1611 OPA1611 ;pnba In+)In-)V+)V-)OUT
XU1 0 N008 VCC VEE N004 OPA1611 OPA1611 ;pnba In+)In-)V+)V-)OUT
C3 plus N005 5.6n
R5 N007 N004 681
R6 N007 0 232
C4 0 N007 5.6n
R8 N010 N004 681
R9 minus N010 232
C5 minus N010 5.6n
R10 N009 N002 681
R11 N009 0 232
C6 0 N009 5.6n
R7 plus minus 25R
XU4 N003 N001 VCC VEE se OPA1622 OPA1622 ;pnba In+)In-)V+)V-)OUT
R12 N001 N002 481
R13 se N001 232
C7 se N001 5.6n
R14 N003 0 232
C8 0 N003 5.6n
R15 N003 N004 481
R16 se 0 25R
XU2 N007 N005 VCC VEE plus OPA1622 OPA1622 ;pnba In+)In-)V+)V-)OUT
XU3 N009 N010 VCC VEE minus OPA1622 OPA1622 ;pnba In+)In-)V+)V-)OUT
.tran 0 10m 0 100n
.four 1k 20 10 V(plus,minus)
.include OPA1611.LIB
.options plotwinsize=0
.options numdgt=15
.param Iac=1.931m
.include OPA1622.LIB

* LTspice schematic (.asc)
Version 4
SHEET 1 2048 1776
WIRE 704 -872 608 -872
WIRE 864 -872 768 -872
WIRE 608 -744 608 -872
WIRE 688 -744 608 -744
WIRE 864 -744 864 -872
WIRE 864 -744 768 -744
WIRE 368 -648 176 -648
WIRE 608 -648 608 -744
WIRE 608 -648 448 -648
WIRE 608 -616 608 -648
WIRE 656 -616 608 -616
WIRE 864 -600 864 -744
WIRE 864 -600 720 -600
WIRE 992 -600 864 -600
WIRE 1024 -600 992 -600
WIRE 656 -584 592 -584
WIRE 368 -552 240 -552
WIRE 592 -552 592 -584
WIRE 592 -552 448 -552
WIRE 1024 -552 1024 -600
WIRE 592 -488 592 -552
WIRE 672 -488 592 -488
WIRE 672 -472 672 -488
WIRE 592 -456 592 -488
WIRE 1024 -424 1024 -472
WIRE 592 -376 592 -392
WIRE 672 -376 672 -392
WIRE 672 -376 592 -376
WIRE 592 -360 592 -376
WIRE 640 -232 560 -232
WIRE 864 -232 704 -232
WIRE 560 -120 560 -232
WIRE 640 -120 560 -120
WIRE 864 -120 864 -232
WIRE 864 -120 720 -120
WIRE -224 -8 -416 -8
WIRE 96 -8 -160 -8
WIRE 176 24 176 -648
WIRE 384 24 176 24
WIRE 560 24 560 -120
WIRE 560 24 464 24
WIRE 640 24 560 24
WIRE 864 40 864 -120
WIRE 864 40 704 40
WIRE 976 40 864 40
WIRE 1024 40 976 40
WIRE 640 56 560 56
WIRE -416 104 -416 -8
WIRE -240 104 -416 104
WIRE 96 104 96 -8
WIRE 96 104 -160 104
WIRE 240 136 240 -552
WIRE 384 136 240 136
WIRE 560 136 560 56
WIRE 560 136 464 136
WIRE 640 136 560 136
WIRE 640 152 640 136
WIRE 560 168 560 136
WIRE -928 232 -1024 232
WIRE -688 232 -720 232
WIRE -416 232 -416 104
WIRE -416 232 -608 232
WIRE -224 232 -416 232
WIRE 96 248 96 104
WIRE 96 248 -160 248
WIRE 176 248 176 24
WIRE 176 248 96 248
WIRE 560 248 560 232
WIRE 640 248 640 232
WIRE 640 248 560 248
WIRE -224 264 -256 264
WIRE 560 264 560 248
WIRE -1024 296 -1024 232
WIRE 1024 312 1024 40
WIRE -256 344 -256 264
WIRE -224 344 -256 344
WIRE 240 376 240 136
WIRE 240 376 96 376
WIRE 560 392 560 376
WIRE 640 392 560 392
WIRE 560 408 560 392
WIRE 640 408 640 392
WIRE -1024 424 -1024 376
WIRE -928 424 -1024 424
WIRE -256 424 -256 344
WIRE -224 424 -256 424
WIRE 96 440 96 376
WIRE 96 440 -160 440
WIRE -1024 456 -1024 424
WIRE -688 456 -720 456
WIRE -416 456 -608 456
WIRE -224 456 -416 456
WIRE 176 504 176 248
WIRE 384 504 176 504
WIRE 560 504 560 472
WIRE 560 504 464 504
WIRE 640 504 640 488
WIRE 640 504 560 504
WIRE -1024 584 -1024 536
WIRE -928 584 -1024 584
WIRE 560 584 560 504
WIRE 640 584 560 584
WIRE -416 600 -416 456
WIRE -240 600 -416 600
WIRE 96 600 96 440
WIRE 96 600 -160 600
WIRE 864 600 704 600
WIRE 976 600 864 600
WIRE 1024 600 1024 392
WIRE 1024 600 976 600
WIRE 240 616 240 376
WIRE 384 616 240 616
WIRE 560 616 464 616
WIRE 640 616 560 616
WIRE -416 712 -416 600
WIRE -240 712 -416 712
WIRE 96 712 96 600
WIRE 96 712 -176 712
WIRE 560 760 560 616
WIRE 640 760 560 760
WIRE 864 760 864 600
WIRE 864 760 720 760
WIRE 560 872 560 760
WIRE 640 872 560 872
WIRE 864 872 864 760
WIRE 864 872 704 872
FLAG -720 232 0
FLAG -720 456 0
FLAG -928 424 0
FLAG -928 232 VCC
FLAG -928 584 VEE
FLAG -224 344 0
FLAG -192 216 VCC
FLAG -192 472 VCC
FLAG -192 408 VEE
FLAG -192 280 VEE
FLAG 672 8 VCC
FLAG 672 72 VEE
FLAG 560 264 0
FLAG 976 40 plus
FLAG 672 632 VCC
FLAG 672 568 VEE
FLAG 560 376 0
FLAG 976 600 minus
FLAG 592 -360 0
FLAG 688 -632 VCC
FLAG 688 -568 VEE
FLAG 1024 -424 0
FLAG 992 -600 se
SYMBOL current -688 232 R270
SYMATTR InstName I1
SYMATTR Value SINE(2.132m {Iac} 1000)
SYMATTR Value2 AC 1
SYMBOL current -688 456 R270
SYMATTR InstName I2
SYMATTR Value SINE(2.132m {Iac} 1000 0 0 180)
SYMATTR Value2 AC 1 180
SYMBOL Misc\\signal -1024 280 R0
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL Misc\\signal -1024 440 R0
SYMATTR InstName V2
SYMATTR Value 12V
SYMBOL res -144 88 R90
SYMATTR InstName R1
SYMATTR Value 1.21k
SYMBOL res -144 584 R90
SYMATTR InstName R2
SYMATTR Value 1.21k
SYMBOL cap -176 696 R90
SYMATTR InstName C1
SYMATTR Value 1.2n
SYMBOL cap -160 -24 R90
SYMATTR InstName C2
SYMATTR Value 1.2n
SYMBOL res 480 8 R90
SYMATTR InstName R3
SYMATTR Value 681
SYMBOL res 736 -136 R90
SYMATTR InstName R4
SYMATTR Value 232
SYMBOL OpAmps\\opamp2 -192 184 R0
SYMATTR InstName U5
SYMATTR Value OPA1611
SYMATTR InstName OPA1611
SYMBOL OpAmps\\opamp2 -192 504 M180
SYMATTR InstName U1
SYMATTR Value OPA1611
SYMATTR InstName OPA1611
SYMBOL cap 704 -248 R90
SYMATTR InstName C3
SYMATTR Value 5.6n
SYMBOL res 480 120 R90
SYMATTR InstName R5
SYMATTR Value 681
SYMBOL res 624 136 R0
SYMATTR InstName R6
SYMATTR Value 232
SYMBOL cap 576 232 R180
SYMATTR InstName C4
SYMATTR Value 5.6n
SYMBOL res 480 632 M270
SYMATTR InstName R8
SYMATTR Value 681
SYMBOL res 736 776 M270
SYMATTR InstName R9
SYMATTR Value 232
SYMBOL cap 704 888 M270
SYMATTR InstName C5
SYMATTR Value 5.6n
SYMBOL res 480 520 M270
SYMATTR InstName R10
SYMATTR Value 681
SYMBOL res 624 504 M180
SYMATTR InstName R11
SYMATTR Value 232
SYMBOL cap 576 408 M0
SYMATTR InstName C6
SYMATTR Value 5.6n
SYMBOL res 1008 296 R0
SYMATTR InstName R7
SYMATTR Value 25R
SYMBOL OpAmps\\opamp2 688 -664 R0
SYMATTR InstName U4
SYMATTR Value OPA1622
SYMATTR InstName OPA1622
SYMBOL res 464 -664 R90
SYMATTR InstName R12
SYMATTR Value 481
SYMBOL res 784 -760 R90
SYMATTR InstName R13
SYMATTR Value 232
SYMBOL cap 768 -888 R90
SYMATTR InstName C7
SYMATTR Value 5.6n
SYMBOL res 656 -488 R0
SYMATTR InstName R14
SYMATTR Value 232
SYMBOL cap 608 -392 R180
SYMATTR InstName C8
SYMATTR Value 5.6n
SYMBOL res 464 -568 R90
SYMATTR InstName R15
SYMATTR Value 481
SYMBOL res 1008 -568 R0
SYMATTR InstName R16
SYMATTR Value 25R
SYMBOL OpAmps\\opamp2 672 -24 R0
SYMATTR InstName U2
SYMATTR Value OPA1622
SYMATTR InstName OPA1622
SYMBOL OpAmps\\opamp2 672 664 M180
SYMATTR InstName U3
SYMATTR Value OPA1622
SYMATTR InstName OPA1622