* Z:\home\khalils\Downloads\files\data\raw_asc\291bbf75bc43_1351.asc
* Generated by LTspice 26.0.1 for Windows.
* 20KHz, 4th Order Butterworth Filter
* Library below included based on ModelFile attribute of instance XU1, XU2 (C:\users\khalils\AppData\Local\LTspice\lib\sym\OpAmps\LT1351.asy)
C4 N003 0 4700p
R2 OUT N003 5.49K
R4 N001 IN 4.64K
C1 N002 N004 470p
V3 IN 0 AC 1
R3 N004 N001 13.3K
V1 +V 0 5
R6 N003 N002 5.49K
C3 OUT N005 220p
XU1 0 N004 +V -V N002 NC_01 LT1351 ;pnba In+)In-)V+)V-)OUT)SHDN
R5 N005 N003 11.3K
R1 N002 N001 4.64K
V2 -V 0 -5
XU2 0 N005 +V -V OUT NC_02 LT1351 ;pnba In+)In-)V+)V-)OUT)SHDN
C2 N001 0 2200p
.ac oct 10 100 100K
.lib LTC.lib
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 896 680
WIRE -288 32 -288 16
WIRE -160 32 -160 16
WIRE 32 48 16 48
WIRE 256 48 112 48
WIRE 416 64 400 64
WIRE 640 64 496 64
WIRE 160 112 128 112
WIRE 256 112 256 48
WIRE 256 112 224 112
WIRE -288 128 -288 112
WIRE -160 128 -160 112
WIRE 544 128 512 128
WIRE 640 128 640 64
WIRE 640 128 608 128
WIRE 176 208 176 192
WIRE -80 224 -176 224
WIRE 16 224 16 48
WIRE 16 224 0 224
WIRE 32 224 16 224
WIRE 128 224 128 112
WIRE 128 224 112 224
WIRE 160 224 128 224
WIRE 560 224 560 208
WIRE -176 240 -176 224
WIRE 256 240 256 112
WIRE 256 240 224 240
WIRE 304 240 256 240
WIRE 400 240 400 64
WIRE 400 240 384 240
WIRE 416 240 400 240
WIRE 512 240 512 128
WIRE 512 240 496 240
WIRE 544 240 512 240
WIRE 160 256 128 256
WIRE 640 256 640 128
WIRE 640 256 608 256
WIRE 672 256 640 256
WIRE 16 272 16 224
WIRE 544 272 512 272
WIRE 176 288 176 272
WIRE 400 288 400 240
WIRE 560 304 560 288
WIRE -176 336 -176 320
WIRE 16 352 16 336
WIRE 400 368 400 352
SYMBOL opamps\\LT1351 576 256 R0
SYMATTR InstName U2
SYMBOL opamps\\LT1351 192 240 R0
SYMATTR InstName U1
SYMBOL cap 384 288 R0
SYMATTR InstName C4
SYMATTR Value 4700p
SYMBOL res 128 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 4.64K
SYMBOL res 400 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 5.49K
SYMBOL cap 224 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 470p
SYMBOL voltage -176 224 R0
SYMATTR InstName V3
SYMATTR Value AC 1
SYMBOL res 512 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 11.3K
SYMBOL res 16 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 4.64K
SYMBOL res 128 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 13.3K
SYMBOL cap 0 272 R0
SYMATTR InstName C2
SYMATTR Value 2200p
SYMBOL res 512 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 5.49K
SYMBOL cap 608 112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 220p
SYMBOL voltage -160 16 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -288 16 R0
SYMATTR InstName V2
SYMATTR Value -5
FLAG -160 128 0
FLAG 176 192 +V
FLAG -160 16 +V
FLAG 176 288 -V
FLAG -288 128 0
FLAG -288 16 -V
FLAG -176 336 0
FLAG 128 256 0
FLAG 16 352 0
FLAG 560 208 +V
FLAG 560 304 -V
FLAG 512 272 0
FLAG 400 368 0
FLAG 672 256 OUT
FLAG -176 224 IN
TEXT 552 384 Left 2 !.ac oct 10 100 100K
TEXT 224 -8 Bottom 2 ;20KHz, 4th Order Butterworth Filter