* SPICE netlist
V1 +V 0 5
V2 -V 0 -5
C1 N001 IN .015
C2 N005 N001 .015
R1 N009 IN 215K
R2 N005 N009 215K
C3 N009 0 .03
R3 N002 N001 100K
R4 N005 0 215K
C4 N005 0 .1
R5 N002 N008 200K
R6 N008 0 100K
C5 N002 N008 .01
V3 IN 0 AC 1
R7 N002 N006 10K
C6 N006 0 .1
C7 N003 N006 .015
C8 N007 N003 .015
R8 N011 N006 169K
R9 N007 N011 169K
C9 N011 0 .03
R10 N004 N003 80.6K
R11 N007 0 169K
C10 N007 0 .1
R12 N004 N010 200K
R13 N010 0 100K
C11 N004 N010 .01
R14 OUT N004 10K
C12 0 OUT .1
XU1 N005 N008 +V -V N002 LT1494 ;pnba In+)In-)V+)V-)OUT
XU2 N007 N010 +V -V N004 LT1494 ;pnba In+)In-)V+)V-)OUT
.ac oct 100 1 1K

* LTspice schematic (.asc)
Version 4
SHEET 1 1632 480
WIRE -416 -224 -608 -224
WIRE -112 -224 -336 -224
WIRE 352 -208 160 -208
WIRE 640 -208 432 -208
WIRE -688 -160 -720 -160
WIRE -608 -160 -608 -224
WIRE -608 -160 -624 -160
WIRE -592 -160 -608 -160
WIRE -496 -160 -528 -160
WIRE 80 -144 48 -144
WIRE 160 -144 160 -208
WIRE 160 -144 144 -144
WIRE 176 -144 160 -144
WIRE 272 -144 240 -144
WIRE -224 -128 -224 -144
WIRE -720 -112 -720 -160
WIRE -720 -112 -816 -112
WIRE -496 -112 -496 -160
WIRE -464 -112 -496 -112
WIRE -368 -112 -464 -112
WIRE -256 -112 -368 -112
WIRE 528 -112 528 -128
WIRE -816 -96 -816 -112
WIRE -464 -96 -464 -112
WIRE -368 -96 -368 -112
WIRE -112 -96 -112 -224
WIRE -112 -96 -192 -96
WIRE -96 -96 -112 -96
WIRE 0 -96 -16 -96
WIRE 48 -96 48 -144
WIRE 48 -96 0 -96
WIRE 272 -96 272 -144
WIRE 304 -96 272 -96
WIRE 400 -96 304 -96
WIRE 496 -96 400 -96
WIRE -256 -80 -288 -80
WIRE 0 -80 0 -96
WIRE 304 -80 304 -96
WIRE 400 -80 400 -96
WIRE 640 -80 640 -208
WIRE 640 -80 560 -80
WIRE 656 -80 640 -80
WIRE 768 -80 736 -80
WIRE 816 -80 768 -80
WIRE -720 -64 -720 -112
WIRE -704 -64 -720 -64
WIRE -608 -64 -624 -64
WIRE -592 -64 -608 -64
WIRE -496 -64 -496 -112
WIRE -496 -64 -512 -64
WIRE 496 -64 464 -64
WIRE -224 -48 -224 -64
WIRE 48 -48 48 -96
WIRE 64 -48 48 -48
WIRE 160 -48 144 -48
WIRE 176 -48 160 -48
WIRE 272 -48 272 -96
WIRE 272 -48 256 -48
WIRE 768 -48 768 -80
WIRE 528 -32 528 -48
WIRE -608 -16 -608 -64
WIRE -816 0 -816 -16
WIRE -464 0 -464 -16
WIRE -368 0 -368 -32
WIRE -288 0 -288 -80
WIRE -192 0 -288 0
WIRE -112 0 -112 -96
WIRE -112 0 -128 0
WIRE 0 0 0 -16
WIRE 160 0 160 -48
WIRE 304 16 304 0
WIRE 400 16 400 -16
WIRE 464 16 464 -64
WIRE 560 16 464 16
WIRE 640 16 640 -80
WIRE 640 16 624 16
WIRE 768 32 768 16
WIRE -608 64 -608 48
WIRE 160 80 160 64
WIRE -384 96 -400 96
WIRE -288 96 -288 0
WIRE -288 96 -304 96
WIRE -224 96 -288 96
WIRE -112 96 -112 0
WIRE -112 96 -144 96
WIRE 368 128 352 128
WIRE 464 128 464 16
WIRE 464 128 448 128
WIRE 528 128 464 128
WIRE 640 128 640 16
WIRE 640 128 608 128
WIRE -32 144 -32 128
WIRE 64 144 64 128
WIRE -32 240 -32 224
WIRE 64 240 64 224
FLAG 64 240 0
FLAG -224 -48 +V
FLAG 64 128 +V
FLAG -224 -144 -V
FLAG -32 240 0
FLAG -32 128 -V
FLAG -608 64 0
FLAG -816 0 0
FLAG -368 0 0
FLAG -464 0 0
FLAG -400 96 0
FLAG 528 -32 +V
FLAG 528 -128 -V
FLAG 160 80 0
FLAG 400 16 0
FLAG 304 16 0
FLAG 352 128 0
FLAG 768 32 0
FLAG 816 -80 OUT
FLAG -816 -112 IN
FLAG 0 0 0
SYMBOL voltage 64 128 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -32 128 R0
SYMATTR InstName V2
SYMATTR Value -5
SYMBOL cap -624 -176 R90
SYMATTR InstName C1
SYMATTR Value .015
SYMBOL cap -528 -176 R90
SYMATTR InstName C2
SYMATTR Value .015
SYMBOL res -608 -80 R90
SYMATTR InstName R1
SYMATTR Value 215K
SYMBOL res -496 -80 R90
SYMATTR InstName R2
SYMATTR Value 215K
SYMBOL cap -624 -16 R0
SYMATTR InstName C3
SYMATTR Value .03
SYMBOL res -320 -240 R90
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL res -480 -112 R0
SYMATTR InstName R4
SYMATTR Value 215K
SYMBOL cap -384 -96 R0
SYMATTR InstName C4
SYMATTR Value .1
SYMBOL res -128 80 R90
SYMATTR InstName R5
SYMATTR Value 200K
SYMBOL res -288 80 R90
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL cap -128 -16 R90
SYMATTR InstName C5
SYMATTR Value .01
SYMBOL voltage -816 -112 R0
SYMATTR InstName V3
SYMATTR Value AC 1
SYMBOL res -112 -112 M90
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL cap -16 -80 R0
SYMATTR InstName C6
SYMATTR Value .1
SYMBOL cap 144 -160 R90
SYMATTR InstName C7
SYMATTR Value .015
SYMBOL cap 240 -160 R90
SYMATTR InstName C8
SYMATTR Value .015
SYMBOL res 160 -64 R90
SYMATTR InstName R8
SYMATTR Value 169K
SYMBOL res 272 -64 R90
SYMATTR InstName R9
SYMATTR Value 169K
SYMBOL cap 144 0 R0
SYMATTR InstName C9
SYMATTR Value .03
SYMBOL res 448 -224 R90
SYMATTR InstName R10
SYMATTR Value 80.6K
SYMBOL res 288 -96 R0
SYMATTR InstName R11
SYMATTR Value 169K
SYMBOL cap 384 -80 R0
SYMATTR InstName C10
SYMATTR Value .1
SYMBOL res 624 112 R90
SYMATTR InstName R12
SYMATTR Value 200K
SYMBOL res 464 112 R90
SYMATTR InstName R13
SYMATTR Value 100K
SYMBOL cap 624 0 R90
SYMATTR InstName C11
SYMATTR Value .01
SYMBOL res 752 -64 M270
SYMATTR InstName R14
SYMATTR Value 10K
SYMBOL cap 752 16 M180
SYMATTR InstName C12
SYMATTR Value .1
SYMBOL opamps\\LT1496 -224 -32 M180
SYMATTR InstName U1
SYMBOL opamps\\LT1496 528 -16 M180
SYMATTR InstName U2