* SPICE netlist
V1 +V 0 15
V2 -V 0 -15
R1 N006 N005 100K
R2 N003 N001 100K
V3 IN+ 0 SINE(0 1 10)
XU1 IN+ N005 +V -V N006 LT1013 ;pnba In+)In-)V+)V-)OUT
XU2 IN- N003 +V -V N001 LT1013 ;pnba In+)In-)V+)V-)OUT
R3 N005 N003 1K
XU3 N004 N002 +V -V OUT LT1013 ;pnba In+)In-)V+)V-)OUT
R4 N002 N001 100K
R5 N004 N006 100K
R6 OUT N002 100K
R7 0 N004 100K
V4 IN- IN+ SINE(0 10m 100)
R8 N007 IN- 10Meg
R9 N007 IN+ 5Meg
R10 N007 N008 10Meg
C1 N008 N007 10p
XU4 IN+ N008 +V -V N007 LT1013 ;pnba In+)In-)V+)V-)OUT
R11 N007 -V 100K
.tran 300m
.options noopiter gminsteps=0

* LTspice schematic (.asc)
Version 4
SHEET 1 976 720
WIRE 56 -344 56 -360
WIRE -296 -328 -488 -328
WIRE -152 -328 -296 -328
WIRE 24 -328 -152 -328
WIRE 184 -312 88 -312
WIRE 248 -312 184 -312
WIRE 344 -312 328 -312
WIRE 360 -312 344 -312
WIRE 456 -312 440 -312
WIRE 24 -296 8 -296
WIRE 184 -296 184 -312
WIRE 56 -264 56 -280
WIRE -152 -216 -152 -328
WIRE 8 -200 8 -296
WIRE 184 -200 184 -216
WIRE 184 -200 8 -200
WIRE 184 -184 184 -200
WIRE -488 -168 -488 -328
WIRE 392 -168 392 -184
WIRE 344 -152 344 -312
WIRE 360 -152 344 -152
WIRE 456 -136 456 -312
WIRE 456 -136 424 -136
WIRE 488 -136 456 -136
WIRE 360 -120 344 -120
WIRE 184 -88 184 -104
WIRE 184 -88 8 -88
WIRE 392 -88 392 -104
WIRE 184 -72 184 -88
WIRE 56 -8 56 -24
WIRE 8 8 8 -88
WIRE 24 8 8 8
WIRE 184 24 184 8
WIRE 184 24 88 24
WIRE 248 24 184 24
WIRE 344 24 344 -120
WIRE 344 24 328 24
WIRE 360 24 344 24
WIRE 456 24 440 24
WIRE -488 40 -488 -88
WIRE -296 40 -488 40
WIRE -248 40 -296 40
WIRE 8 40 -248 40
WIRE 24 40 8 40
WIRE -488 56 -488 40
WIRE 56 72 56 56
WIRE -248 88 -248 40
WIRE 184 104 184 88
WIRE -488 152 -488 136
WIRE 56 168 56 152
WIRE 8 184 8 40
WIRE 24 184 8 184
WIRE 184 200 184 184
WIRE 184 200 88 200
WIRE -248 216 -248 168
WIRE -152 216 -152 -136
WIRE -152 216 -248 216
WIRE -136 216 -152 216
WIRE -40 216 -56 216
WIRE 24 216 -40 216
WIRE -40 232 -40 216
WIRE -424 248 -424 232
WIRE -344 248 -344 232
WIRE 56 248 56 232
WIRE -152 312 -152 216
WIRE -40 312 -40 296
WIRE -40 312 -152 312
WIRE 184 312 184 200
WIRE 184 312 -40 312
WIRE -424 360 -424 328
WIRE -344 360 -344 328
FLAG -344 360 0
FLAG 56 -24 +V
FLAG -344 232 +V
FLAG 56 72 -V
FLAG -424 360 0
FLAG -424 232 -V
FLAG -488 152 0
FLAG 56 -264 +V
FLAG 56 -360 -V
FLAG 392 -184 +V
FLAG 392 -88 -V
FLAG 456 24 0
FLAG 56 248 +V
FLAG 56 152 -V
FLAG 184 88 -V
FLAG 488 -136 OUT
FLAG -296 -328 IN-
FLAG -296 40 IN+
SYMBOL voltage -344 232 R0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -424 232 R0
SYMATTR InstName V2
SYMATTR Value -15
SYMBOL res 168 24 M180
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL res 168 -200 M180
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL voltage -488 40 R0
SYMATTR InstName V3
SYMATTR Value SINE(0 1 10)
SYMBOL opamps\\LT1014 56 -40 R0
SYMATTR InstName U1
SYMBOL opamps\\LT1014 56 -248 M180
SYMATTR InstName U2
SYMBOL res 168 -88 M180
SYMATTR InstName R3
SYMATTR Value 1K
SYMBOL opamps\\LT1014 392 -200 R0
SYMATTR InstName U3
SYMBOL res 344 -328 R90
SYMATTR InstName R4
SYMATTR Value 100K
SYMBOL res 344 8 R90
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL res 456 -328 R90
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL res 456 8 R90
SYMATTR InstName R7
SYMATTR Value 100K
SYMBOL voltage -488 -184 R0
SYMATTR InstName V4
SYMATTR Value SINE(0 10m 100)
SYMBOL res -168 -120 M180
SYMATTR InstName R8
SYMATTR Value 10Meg
SYMBOL res -264 184 M180
SYMATTR InstName R9
SYMATTR Value 5Meg
SYMBOL res -152 200 M90
SYMATTR InstName R10
SYMATTR Value 10Meg
SYMBOL cap -56 232 R0
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL opamps\\LT1014 56 264 M180
SYMATTR InstName U4
SYMBOL res 168 200 M180
SYMATTR InstName R11
SYMATTR Value 100K