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 272 304 64 304 WIRE 432 304 272 304 WIRE 64 336 64 304 WIRE 272 336 272 304 WIRE -48 448 -80 448 WIRE 64 448 64 400 WIRE 64 448 16 448 WIRE 96 448 64 448 WIRE 128 448 96 448 WIRE 224 448 192 448 WIRE 272 448 272 416 WIRE 272 448 224 448 WIRE 352 448 272 448 WIRE 432 464 432 304 WIRE 432 464 416 464 WIRE 480 464 432 464 WIRE 64 480 64 448 WIRE 352 480 272 480 WIRE 272 512 272 480 WIRE 64 592 64 560 FLAG -80 224 0 FLAG 48 224 0 FLAG 96 224 0 FLAG 64 592 0 FLAG -16 80 in FLAG -80 448 in FLAG 480 464 HP FLAG 160 80 test FLAG 96 448 1 FLAG 224 448 2 FLAG 272 512 0 SYMBOL voltage -80 96 R0 SYMATTR InstName V1 SYMATTR Value AC 1 SYMBOL e 96 112 R0 SYMATTR InstName E1 SYMATTR Value Laplace=-(C1/C2)*s*s/(s*s+s*(C1+C2+C3)/(R1*C2*C3)+1/(R1*R2*C2*C3)) SYMBOL Opamps\\opamp 384 400 R0 SYMATTR InstName U2 SYMBOL Misc\\EuropeanResistor 256 320 R0 SYMATTR InstName R1 SYMATTR Value {R1} SYMBOL Misc\\EuropeanResistor 48 464 R0 SYMATTR InstName R2 SYMATTR Value {R2} SYMBOL cap -48 464 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C1 SYMATTR Value {C1} SYMBOL cap 128 464 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C3 SYMATTR Value {C3} SYMBOL cap 48 336 R0 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 -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 C3=C\n.param R1=(C1+C2+C3)/(a*wg*C2*C3)\n.param R2=1/(b*wg*wg*R1*C2*C3) 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 2 35063.8781872429 \nr2 1 0 11689.3897523319 \nc1 in 1 1e-008 \nc3 1 2 1e-008 \nc2 hp 1 1e-008