From: Sepp K. <cho...@t-...> - 2011-11-25 16:25:24
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On Montag, 21. November 2011 07:27:02 Holger Steffens wrote: > Hi all, Hi Holger, > since a friend recommended qucs I tried it first time yesterday. Although > the possibilties seems infinite, I failed to simulate a pulse source > driving a transmission line into an open end. I tried many different > transmission line models, but the reflexions were never shown properly. > Thus my question is: Can qucs be used for high speed digital effects at > all? Thanks for your help - Holger Maybe you want start experimenting with something like the following: <Qucs Schematic 0.0.16> <Properties> <View=0,-60,1083,800,0.77175,0,0> <Grid=10,10,1> <DataSet=TD3.dat> <DataDisplay=TD3.dpl> <OpenDisplay=1> <Script=TD3.m> <RunScript=0> <showFrame=0> <FrameText0=Titel> <FrameText1=Gezeichnet von:> <FrameText2=Datum:> <FrameText3=Revision:> </Properties> <Symbol> </Symbol> <Components> <R R5 1 520 370 -103 -26 0 3 "50 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0> <R R6 1 840 370 -103 -26 0 3 "50 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0> <R R2 1 270 220 -26 -65 0 2 "17 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0> <R R3 1 390 140 -26 -65 0 2 "17 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0> <R R4 1 390 280 -26 -65 0 2 "17 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0> <VProbe Measurement 1 600 370 -16 28 0 3> <GND * 1 120 480 0 0 0 0> <GND * 1 520 480 0 0 0 0> <GND * 1 840 480 0 0 0 0> <R R1 1 120 280 15 -26 0 1 "50 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0> <TLIN Line1 1 500 140 -26 20 0 0 "50 Ohm" 1 "1000 mm" 1 "0 dB" 0 "26.85" 0> <TLIN Line2 1 760 140 -26 20 0 0 "50 Ohm" 1 "1000 mm" 1 "0 dB" 0 "26.85" 0> <GND * 1 630 260 0 0 0 0> <.TR TR1 1 110 550 0 51 0 0 "lin" 1 "0" 1 "10 ns" 1 "1001" 0 "Trapezoidal" 0 "2" 0 "1 ns" 0 "1e-16" 0 "150" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "26.85" 0 "1e-3" 0 "1e-6" 0 "1" 0 "CroutLU" 0 "no" 0 "yes" 0 "0" 0> <Vpulse V1 1 120 370 18 -26 0 1 "0 V" 1 "1 V" 1 "0" 1 "0.2 ns" 1 "0.05 ns" 0 "0.05 ns" 0> <C C1 1 630 190 17 -26 0 1 "22 pF" 1 "" 0 "neutral" 0> </Components> <Wires> <300 220 340 220 "" 0 0 0 ""> <340 140 340 220 "" 0 0 0 ""> <340 140 360 140 "" 0 0 0 ""> <340 220 340 280 "" 0 0 0 ""> <340 280 360 280 "" 0 0 0 ""> <420 280 520 280 "" 0 0 0 ""> <520 280 520 340 "" 0 0 0 ""> <120 400 120 480 "" 0 0 0 ""> <520 400 520 480 "" 0 0 0 ""> <840 400 840 480 "" 0 0 0 ""> <120 220 120 250 "" 0 0 0 ""> <120 220 240 220 "" 0 0 0 ""> <120 310 120 340 "" 0 0 0 ""> <530 140 630 140 "" 0 0 0 ""> <420 140 470 140 "" 0 0 0 ""> <840 140 840 340 "" 0 0 0 ""> <790 140 840 140 "" 0 0 0 ""> <630 210 630 220 "" 0 0 0 ""> <630 140 730 140 "" 0 0 0 ""> <630 140 630 160 "" 0 0 0 ""> <520 340 580 340 "" 0 0 0 ""> <580 340 580 360 "" 0 0 0 ""> <580 380 580 400 "" 0 0 0 ""> <520 400 580 400 "" 0 0 0 ""> <630 220 630 260 "" 0 0 0 ""> </Wires> <Diagrams> <Rect 400 796 643 236 3 #c0c0c0 1 00 1 0 0.2 1 1 -0.1 0.5 1.1 1 -0.1 0.5 1.1 315 0 225 "" "" ""> <"Measurement.Vt" #0000ff 0 3 0 0 0> </Rect> </Diagrams> <Paintings> </Paintings> > --------------------------------------------------------------------------- > --- All the data continuously generated in your IT infrastructure > contains a definitive record of customers, application performance, > security threats, fraudulent activity, and more. Splunk takes this > data and makes sense of it. IT sense. And common sense. > http://p.sf.net/sfu/splunk-novd2d > _______________________________________________ > Qucs-help mailing list > Quc...@li... > https://lists.sourceforge.net/lists/listinfo/qucs-help |