Version 4
SHEET 1 1656 780
WIRE -16 80 -80 80
WIRE 48 80 -16 80
WIRE 160 80 96 80
WIRE -80 112 -80 80
WIRE 96 128 96 80
WIRE 48 144 48 80
WIRE -80 224 -80 192
WIRE 48 224 48 192
WIRE 96 224 96 208
WIRE 432 320 64 320
WIRE 64 352 64 320
WIRE 432 400 432 320
WIRE 432 400 336 400
WIRE 336 448 336 400
WIRE 352 448 336 448
WIRE 432 464 432 400
WIRE 432 464 416 464
WIRE 480 464 432 464
WIRE -48 480 -80 480
WIRE 64 480 64 432
WIRE 64 480 16 480
WIRE 96 480 64 480
WIRE 128 480 96 480
WIRE 240 480 192 480
WIRE 288 480 240 480
WIRE 352 480 288 480
WIRE 240 512 240 480
WIRE 240 624 240 592
FLAG -80 224 0
FLAG 48 224 0
FLAG 96 224 0
FLAG 240 624 0
FLAG -16 80 in
FLAG -80 480 in
FLAG 480 464 HP
FLAG 160 80 test
FLAG 96 480 1
FLAG 288 480 2
SYMBOL voltage -80 96 R0
SYMATTR InstName V1
SYMATTR Value AC 1
SYMBOL e 96 112 R0
SYMATTR InstName E1
SYMATTR Value Laplace=s^2*R1*R2*C1*C2/(1+s*R1*(C1+C2)+s*s*R1*R2*C1*C2)
SYMBOL Opamps\\opamp 384 400 R0
SYMATTR InstName U2
SYMBOL Misc\\EuropeanResistor 48 336 R0
SYMATTR InstName R1
SYMATTR Value {R1}
SYMBOL Misc\\EuropeanResistor 224 496 R0
SYMATTR InstName R2
SYMATTR Value {R2}
SYMBOL cap -48 496 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value {C1}
SYMBOL cap 128 496 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value {C2}
TEXT -80 -72 Left 2 !.lib opamp.sub
TEXT -80 -32 Left 2 !.ac dec 100 100 10k
TEXT 432 -344 Left 2 ;.param fg=1000\n.param wg=2*pi*fg\n.param a=1.3617 b=0.618\n.param C=10n\n.param C1=C\n.param C2=C1\n.param R2=2/(a*wg*C)\n.param R1=R2*a*a/(4*b) ;a/(b*wg*2*C);
TEXT -72 -344 Left 2 !.param fg=1000\n.param wg=2*pi*fg\n.param a=1.3617 b=0.618\n.param C=10n\n.param C1=C\n.param C2=C\n.param R2=(C1+C2)/(a*wg*C1*C2)\n.param R1=a/(b*wg*(C1+C2))
TEXT 32 -1008 Left 4 ;Highpass F(s) = P^2/(1+a/P + b/P^2)
TEXT -64 -768 Left 2 ;Bessel\n \nOrdnung i ai bi\n \n1 1 1,0000 0,0000\n \n2 1 1,3617 0,6180\n \n3 1 0,7560 0,0000 \n- 2 0,9996 0,4772\n \n4 1 1,3397 0,4889\n- 2 0,7743 0,3890
TEXT 200 -768 Left 2 ;Butterworth\n \nOrdnung i ai bi\n \n1 1 1,0000 0,0000\n \n2 1 1,4142 1,0000\n \n3 1 1,0000 0,0000\n- 2 1,0000 1,0000\n \n4 1 1,8478 1,0000\n- 2 0,7654 1,0000
TEXT 448 -792 Left 2 ;Tschebyscheff\n(0,5 dB Welligkeit)\n \nOrdnung i ai bi\n \n1 1 1,0000 0,0000\n \n2 1 1,3614 1,3827\n \n3 1 1,8626 0,0000\n- 2 0,6402 1,1931\n \n4 1 2,6282 3,4341\n- 2 0,3648 1,1509
TEXT 704 -792 Left 2 ;Tschebyscheff\n(3 dB Welligkeit)\n \nOrdnung i ai bi\n \n1 1 1,0000 0,0000\n \n2 1 1,0650 1,9305\n \n3 1 3,3496 0,0000\n- 2 0,3559 1,1923\n \n4 1 2,1853 5,5339\n- 2 0,1964 1,2009
TEXT -56 -944 Left 2 ;Literatur: http://www.fbeit.htwk-leipzig.de/~reinhold/Elektronik_Uni_Lpz/EL2_Kap_3.pdf\nProf. Dr. Wolfgang Reinhold 24/24\nHTWK Leipzig\nFakultät Elektrotechnik und Informationstechnik Kap_3_Filter.docx, 20.05.2011
TEXT 584 392 Left 2 ;View -> SPICE Error Log\nr1 hp 1 17534.0846284979 \nr2 2 0 23375.9187914952 \nc1 in 1 1e-008 \nc2 1 2 1e-008