* SPICE netlist
V1 +12 0 11.5
V2 0 -12 11.6
R1 N010 N011 44.2K
V3 N006 0 PULSE(-1 1 0 1e-4 1e-4 .005 .01) AC 1 Rser=0
C1 FILT N010 1nF
XU2 N012 FILT +12 -12 FILT LT1354 ;pnba In+)In-)V+)V-)OUT
R3 N012 N010 90.9K
C2 N012 0 220pF
R2 0 N005 1.96K
C3 OSC N005 24nF
XU1 0 N008 +12 -12 OSC LT1354 ;pnba In+)In-)V+)V-)OUT
R4 N008 OSC 2.05K
C4 N008 N005 24nF
XU3 0 N009 +12 -12 OUT LT1354 ;pnba In+)In-)V+)V-)OUT
R5 N009 OSC 4.12K
R6 N009 FILT 10K
R7 OUT N009 10K
XU4 0 N001 +12 -12 N002 LT1354 ;pnba In+)In-)V+)V-)OUT
R8 N001 N006 121K
R9 N002 N001 53.2K
C5 N002 N001 100pF
XU5 N013 N011 +12 -12 N011 LT1354 ;pnba In+)In-)V+)V-)OUT
R10 N013 N006 30.1K
C6 N013 0 1nF
R11 N005 N004 604
R12 0 N003 2.05K
C7 N004 N003 6.8nF
XU6 0 N007 +12 -12 N004 LT1354 ;pnba In+)In-)V+)V-)OUT
R13 N007 N004 2.15K
C8 N007 N003 6.8nF
R14 N003 N002 634
.ac oct 10 1e3 50e4
;tran 0 30e-3 0 .001

* LTspice schematic (.asc)
Version 4
SHEET 1 2000 912
WIRE -584 -440 -632 -440
WIRE -456 -440 -520 -440
WIRE -632 -376 -632 -440
WIRE -600 -376 -632 -376
WIRE -456 -376 -456 -440
WIRE -456 -376 -520 -376
WIRE -264 -376 -296 -376
WIRE -120 -376 -200 -376
WIRE 40 -376 -120 -376
WIRE 216 -360 184 -360
WIRE 360 -360 280 -360
WIRE 520 -360 360 -360
WIRE 552 -360 520 -360
WIRE -120 -344 -120 -376
WIRE 360 -328 360 -360
WIRE -760 -264 -792 -264
WIRE -632 -264 -632 -376
WIRE -632 -264 -680 -264
WIRE -600 -264 -632 -264
WIRE -456 -248 -456 -376
WIRE -456 -248 -536 -248
WIRE -424 -248 -456 -248
WIRE -296 -248 -296 -376
WIRE -296 -248 -344 -248
WIRE -264 -248 -296 -248
WIRE -120 -248 -120 -264
WIRE -120 -248 -200 -248
WIRE -88 -248 -120 -248
WIRE -600 -232 -632 -232
WIRE 40 -232 40 -376
WIRE 40 -232 -24 -232
WIRE 56 -232 40 -232
WIRE 184 -232 184 -360
WIRE 184 -232 136 -232
WIRE 216 -232 184 -232
WIRE 360 -232 360 -248
WIRE 360 -232 280 -232
WIRE 392 -232 360 -232
WIRE -296 -216 -296 -248
WIRE -88 -216 -120 -216
WIRE 520 -216 520 -360
WIRE 520 -216 456 -216
WIRE 568 -216 520 -216
WIRE 680 -216 648 -216
WIRE 184 -200 184 -232
WIRE 392 -200 360 -200
WIRE -632 -184 -632 -232
WIRE -120 -168 -120 -216
WIRE 360 -152 360 -200
WIRE 680 -152 680 -216
WIRE 808 -152 680 -152
WIRE 856 -152 808 -152
WIRE 984 -152 936 -152
WIRE -296 -104 -296 -136
WIRE 184 -88 184 -120
WIRE 808 -56 808 -152
WIRE 856 -56 808 -56
WIRE 984 -40 984 -152
WIRE 984 -40 920 -40
WIRE 1000 -40 984 -40
WIRE 856 -24 808 -24
WIRE 248 -8 200 -8
WIRE 360 -8 312 -8
WIRE 520 -8 360 -8
WIRE 552 -8 520 -8
WIRE 40 8 -88 8
WIRE 808 24 808 -24
WIRE 360 72 360 -8
WIRE 392 72 360 72
WIRE -88 88 -88 8
WIRE -56 88 -88 88
WIRE 520 88 520 -8
WIRE 520 88 456 88
WIRE 568 88 520 88
WIRE 680 88 680 -152
WIRE 680 88 648 88
WIRE 40 104 40 8
WIRE 40 104 8 104
WIRE 72 104 40 104
WIRE 200 104 200 -8
WIRE 200 104 152 104
WIRE 248 104 200 104
WIRE 360 104 328 104
WIRE 392 104 360 104
WIRE -792 120 -792 -264
WIRE -280 120 -792 120
WIRE -120 120 -200 120
WIRE -56 120 -120 120
WIRE -120 152 -120 120
WIRE 360 152 360 104
WIRE -792 216 -792 120
WIRE -120 248 -120 216
WIRE 360 248 360 216
WIRE -904 328 -904 296
WIRE -904 328 -1000 328
WIRE -792 328 -792 296
WIRE -792 328 -904 328
WIRE -1000 360 -1000 328
WIRE -904 376 -904 328
FLAG -1000 360 0
FLAG -904 216 +12
FLAG -904 456 -12
FLAG 360 248 0
FLAG 424 56 +12
FLAG 424 120 -12
FLAG 184 -88 0
FLAG 424 -248 +12
FLAG 424 -184 -12
FLAG 808 24 0
FLAG 888 -72 +12
FLAG 888 -8 -12
FLAG -568 -280 +12
FLAG -568 -216 -12
FLAG -632 -184 0
FLAG 552 -360 OSC
IOPIN 752 -464 Out
FLAG 552 -8 FILT
IOPIN 752 -112 Out
FLAG 1000 -40 OUT
IOPIN 1200 -144 Out
FLAG -24 72 +12
FLAG -24 136 -12
FLAG -120 248 0
FLAG 360 -152 0
FLAG -296 -104 0
FLAG -56 -264 +12
FLAG -56 -200 -12
FLAG -120 -168 0
SYMBOL voltage -904 200 R0
SYMATTR InstName V1
SYMATTR Value 11.5
SYMBOL voltage -904 360 R0
SYMATTR InstName V2
SYMATTR Value 11.6
SYMBOL res 168 88 R90
SYMATTR InstName R1
SYMATTR Value 44.2K
SYMBOL voltage -792 200 R0
SYMATTR Value PULSE(-1 1 0 1e-4 1e-4 .005 .01)
SYMATTR Value2 AC 1
SYMATTR SpiceLine Rser=0
SYMATTR InstName V3
SYMBOL cap 312 -24 R90
SYMATTR InstName C1
SYMATTR Value 1nF
SYMBOL OpAmps\\LT1354 424 24 R0
SYMATTR InstName U2
SYMBOL res 344 88 R90
SYMATTR InstName R3
SYMATTR Value 90.9K
SYMBOL cap 344 152 R0
SYMATTR InstName C2
SYMATTR Value 220pF
SYMBOL res 200 -104 R180
SYMATTR InstName R2
SYMATTR Value 1.96K
SYMBOL cap 280 -376 R90
SYMATTR InstName C3
SYMATTR Value 24nF
SYMBOL OpAmps\\LT1354 424 -280 R0
SYMATTR InstName U1
SYMBOL res 376 -232 R180
SYMATTR InstName R4
SYMATTR Value 2.05K
SYMBOL cap 280 -248 R90
SYMATTR InstName C4
SYMATTR Value 24nF
SYMBOL OpAmps\\LT1354 888 -104 R0
SYMATTR InstName U3
SYMBOL res 664 -232 R90
SYMATTR InstName R5
SYMATTR Value 4.12K
SYMBOL res 664 72 R90
SYMATTR InstName R6
SYMATTR Value 10K
SYMBOL res 952 -168 R90
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL OpAmps\\LT1354 -568 -312 R0
SYMATTR InstName U4
SYMBOL res -664 -280 R90
SYMATTR InstName R8
SYMATTR Value 121K
SYMBOL res -504 -392 R90
SYMATTR InstName R9
SYMATTR Value 53.2K
SYMBOL cap -520 -456 R90
SYMATTR InstName C5
SYMATTR Value 100pF
SYMBOL OpAmps\\LT1354 -24 40 R0
SYMATTR InstName U5
SYMBOL res -184 104 R90
SYMATTR InstName R10
SYMATTR Value 30.1K
SYMBOL cap -136 152 R0
SYMATTR InstName C6
SYMATTR Value 1nF
SYMBOL res 152 -248 R90
SYMATTR InstName R11
SYMATTR Value 604
SYMBOL res -280 -120 R180
SYMATTR InstName R12
SYMATTR Value 2.05K
SYMBOL cap -200 -392 R90
SYMATTR InstName C7
SYMATTR Value 6.8nF
SYMBOL OpAmps\\LT1354 -56 -296 R0
SYMATTR InstName U6
SYMBOL res -104 -248 R180
SYMATTR InstName R13
SYMATTR Value 2.15K
SYMBOL cap -200 -264 R90
SYMATTR InstName C8
SYMATTR Value 6.8nF
SYMBOL res -328 -264 R90
SYMATTR InstName R14
SYMATTR Value 634