Version 4 SHEET 1 1656 780 WIRE 432 -32 416 -32 WIRE 544 -32 480 -32 WIRE 480 0 480 -32 WIRE 432 16 432 -32 WIRE -16 80 -80 80 WIRE 48 80 -16 80 WIRE 160 80 96 80 WIRE 432 96 432 64 WIRE 480 96 480 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 FLAG 432 96 0 FLAG 480 96 0 FLAG 544 -32 testab FLAG 416 -32 in 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} SYMBOL e 480 -16 R0 SYMATTR InstName E2 SYMATTR Value Laplace=1/(1+a*wg/s+b*wg*wg/(s*s)) 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