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  1. <Qucs Schematic 0.0.19>
  2. <Properties>
  3. <View=0,-80,965,800,1,0,0>
  4. <Grid=10,10,1>
  5. <DataSet=lc-ladder-pi-butterworth-6.9M-7.4M-bandpass-expe-adjust-v6-schottky.dat>
  6. <DataDisplay=lc-ladder-pi-butterworth-6.9M-7.4M-bandpass-expe-adjust-v6-schottky.dpl>
  7. <OpenDisplay=1>
  8. <Script=lc-ladder-pi-butterworth-6.9M-7.4M-bandpass-expe-adjust-v6-schottky.m>
  9. <RunScript=0>
  10. <showFrame=0>
  11. <FrameText0=Title>
  12. <FrameText1=Drawn By:>
  13. <FrameText2=Date:>
  14. <FrameText3=Revision:>
  15. </Properties>
  16. <Symbol>
  17. </Symbol>
  18. <Components>
  19. <Pac P1 1 240 280 18 -26 0 1 "1" 1 "50 Ohm" 1 "0 dBm" 0 "1 GHz" 0 "26.85" 0>
  20. <GND * 1 240 310 0 0 0 0>
  21. <L L1 1 390 280 8 -26 0 1 "56nH" 1 "" 0>
  22. <GND * 1 390 310 0 0 0 0>
  23. <Pac P2 1 530 280 18 -26 0 1 "2" 1 "50 Ohm" 1 "0 dBm" 0 "1 GHz" 0 "26.85" 0>
  24. <GND * 1 530 310 0 0 0 0>
  25. <.SP SP1 1 290 380 0 67 0 0 "log" 1 "690kHz" 1 "74MHz" 1 "201" 1 "no" 0 "1" 0 "2" 0 "no" 0 "no" 0>
  26. <Eqn Eqn1 1 510 390 -28 15 0 0 "dBS21=dB(S[2,1])" 1 "dBS11=dB(S[1,1])" 1 "yes" 0>
  27. <C C1 1 360 280 -8 46 0 1 "9nF" 1 "" 0 "neutral" 0>
  28. <L L2 1 500 100 -26 -44 0 0 "22uH" 1 "" 0>
  29. <C C2 1 440 100 -26 10 0 0 "22pF" 1 "" 0 "neutral" 0>
  30. <Diode D_1N4148_1 1 530 130 13 -26 0 1 "222p" 1 "1.65" 1 "4p" 0 "0.333" 0 "0.7" 0 "0.5" 0 "0" 0 "0" 0 "2" 0 "68.6m" 0 "5.76n" 0 "0" 0 "0" 0 "1" 0 "1" 0 "75" 0 "1u" 0 "26.85" 0 "3.0" 0 "1.11" 0 "0.0" 0 "0.0" 0 "0.0" 0 "0.0" 0 "0.0" 0 "0.0" 0 "26.85" 0 "1.0" 0 "normal" 0>
  31. </Components>
  32. <Wires>
  33. <360 250 390 250 "" 0 0 0 "">
  34. <360 310 390 310 "" 0 0 0 "">
  35. <390 100 390 250 "" 0 0 0 "">
  36. <240 100 240 250 "" 0 0 0 "">
  37. <240 100 390 100 "" 0 0 0 "">
  38. <390 100 410 100 "" 0 0 0 "">
  39. <530 250 530 280 "" 0 0 0 "">
  40. <530 160 530 250 "" 0 0 0 "">
  41. </Wires>
  42. <Diagrams>
  43. </Diagrams>
  44. <Paintings>
  45. <Text 620 380 12 #000000 0 "v6\n\nButterworth band-pass filter \n 6.9MHz...7.4MHz, pi-type, \n impedance matching 50 Ohm\n\nExperiments for adjusting component values\n\nL2=22uH (Axial Fixed Inductor, 0.25W or 0.50W or 1W)\nL1= 56nH = 0.056uH (I don't know where to procure this!)\nC1= 6.8nF + 2.2nF ceramic capacitor in parallel = 9nF\nC2=22pF ceramic capacitor\n">
  46. </Paintings>
  47.  
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