* SPICE netlist
V1 Vp 0 15
V2 Vm 0 -15
V4 N003 0 0
R3 N001 N005 1k
C2 N001 N004 100n
C1 N001 0 2n
R1 OUT N001 2.4k
R2 OUT N002 100k
R2b N002 0 100k
V3 N006 0 -15
V5 N010 0 15
R6 N004 N003 10k
XU3 N001 N002 +V -V OUT LT1357 ;pnba In+)In-)V+)V-)OUT
XU1 N004 N005 Vp Vm N005 LT1357 ;pnba In+)In-)V+)V-)OUT
XU2 N007 -V N008 N009 -V LT1357 ;pnba In+)In-)V+)V-)OUT
V8 N008 0 15
V9 N009 0 -15
XU4 N011 +V N012 N013 +V LT1357 ;pnba In+)In-)V+)V-)OUT
V6 N012 0 15
V7 N013 0 -15
R4 N007 N006 2500
R5 0 N007 10000
R7 0 N011 10000
R9 N010 N011 2500
.tran 0 0.05 0 startup
;ac oct 0.02 1 8k

* LTspice schematic (.asc)
Version 4
SHEET 1 1184 1600
WIRE -352 -784 -352 -800
WIRE -224 -784 -224 -800
WIRE -32 -784 -64 -784
WIRE 96 -784 32 -784
WIRE 240 -784 96 -784
WIRE 400 -784 240 -784
WIRE 448 -784 400 -784
WIRE 592 -784 528 -784
WIRE 96 -768 96 -784
WIRE 240 -768 240 -784
WIRE -352 -688 -352 -704
WIRE -224 -688 -224 -704
WIRE 176 -688 176 -704
WIRE 448 -688 368 -688
WIRE -16 -672 -48 -672
WIRE 96 -672 96 -704
WIRE 96 -672 64 -672
WIRE 144 -672 112 -672
WIRE 400 -672 400 -784
WIRE 432 -672 400 -672
WIRE 448 -672 448 -688
WIRE 464 -672 448 -672
WIRE 480 -672 464 -672
WIRE 96 -656 96 -672
WIRE 128 -656 96 -656
WIRE 240 -656 240 -688
WIRE 240 -656 208 -656
WIRE 592 -656 592 -784
WIRE 592 -656 528 -656
WIRE 112 -640 112 -672
WIRE 112 -640 96 -640
WIRE 128 -640 128 -656
WIRE 144 -640 128 -640
WIRE 368 -640 368 -688
WIRE 400 -640 368 -640
WIRE 432 -640 432 -672
WIRE 464 -640 432 -640
WIRE -48 -608 -48 -672
WIRE 176 -608 176 -624
WIRE 400 -560 400 -640
WIRE 480 -560 400 -560
WIRE 592 -560 592 -656
WIRE 592 -560 560 -560
WIRE 96 -544 96 -640
WIRE 240 -544 240 -656
WIRE 240 -544 96 -544
WIRE 400 -528 400 -560
WIRE -48 -512 -48 -528
WIRE 96 -224 -112 -224
WIRE -304 -192 -592 -192
WIRE -192 -192 -224 -192
WIRE 16 -176 16 -192
WIRE -192 -160 -192 -192
WIRE -144 -160 -192 -160
WIRE -192 -128 -192 -160
WIRE -592 -96 -592 -192
WIRE 16 -80 16 -96
WIRE -112 -64 -112 -224
WIRE -16 -64 -112 -64
WIRE 96 -48 96 -224
WIRE 96 -48 48 -48
WIRE 144 -48 96 -48
WIRE -144 -32 -144 -160
WIRE -16 -32 -144 -32
WIRE 16 0 16 -16
WIRE -592 32 -592 -16
WIRE -432 32 -592 32
WIRE -192 32 -192 -48
WIRE -192 32 -432 32
WIRE -432 48 -432 32
WIRE 16 96 16 80
WIRE 208 352 0 352
WIRE -192 368 -480 368
WIRE 128 400 128 384
WIRE -112 416 -112 368
WIRE -64 416 -112 416
WIRE -480 448 -480 368
WIRE -112 448 -112 416
WIRE -112 448 -128 448
WIRE -128 528 -144 528
WIRE 128 560 128 480
WIRE 0 576 0 352
WIRE 96 576 0 576
WIRE 208 592 208 352
WIRE 208 592 160 592
WIRE 240 592 208 592
WIRE -64 608 -64 416
WIRE 96 608 -64 608
WIRE -480 656 -480 528
WIRE -320 656 -480 656
WIRE -144 656 -144 528
WIRE -144 656 -320 656
WIRE -320 672 -320 656
WIRE 128 704 128 624
WIRE 128 800 128 784
FLAG -224 -688 0
FLAG -352 -688 0
FLAG 144 -48 -V
FLAG -48 -512 0
FLAG -64 -784 0
FLAG 400 -448 0
FLAG -224 -800 Vp
FLAG -352 -800 Vm
FLAG 176 -704 Vp
FLAG 176 -608 Vm
FLAG -320 672 0
FLAG -432 48 0
FLAG 240 592 +V
FLAG 496 -688 +V
FLAG 496 -624 -V
FLAG 592 -656 OUT
FLAG 16 -192 0
FLAG 16 96 0
FLAG 128 384 0
FLAG 128 800 0
SYMBOL voltage -224 -800 R0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -352 -800 R0
SYMATTR InstName V2
SYMATTR Value -15
SYMBOL voltage -48 -624 R0
SYMATTR Value 0
SYMATTR InstName V4
SYMBOL res 224 -784 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL cap 80 -768 R0
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL cap 32 -800 R90
SYMATTR InstName C1
SYMATTR Value 2n
SYMBOL res 544 -800 R90
SYMATTR InstName R1
SYMATTR Value 2.4k
SYMBOL res 576 -576 R90
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL res 384 -544 R0
SYMATTR InstName R2b
SYMATTR Value 100k
SYMBOL voltage -592 -112 R0
SYMATTR InstName V3
SYMATTR Value -15
SYMBOL voltage -480 432 R0
SYMATTR InstName V5
SYMATTR Value 15
SYMBOL res 80 -688 R90
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL OpAmps\\LT1357 496 -720 R0
SYMATTR InstName U3
SYMBOL OpAmps\\LT1357 176 -720 R0
SYMATTR InstName U1
SYMBOL OpAmps\\LT1357 16 -112 R0
SYMATTR InstName U2
SYMBOL voltage 16 -80 R180
SYMATTR InstName V8
SYMATTR Value 15
SYMBOL voltage 16 -16 R0
SYMATTR InstName V9
SYMATTR Value -15
SYMBOL OpAmps\\LT1357 128 528 R0
SYMATTR InstName U4
SYMBOL voltage 128 496 R180
SYMATTR InstName V6
SYMATTR Value 15
SYMBOL voltage 128 688 R0
SYMATTR InstName V7
SYMATTR Value -15
SYMBOL res -208 -208 R90
SYMATTR InstName R4
SYMATTR Value 2500
SYMBOL res -176 -32 R180
SYMATTR InstName R5
SYMATTR Value 10000
SYMBOL res -112 544 R180
SYMATTR InstName R7
SYMATTR Value 10000
SYMBOL res -208 384 R270
SYMATTR InstName R9
SYMATTR Value 2500