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kicad/pcb_calculator/attenuators/tee_formula.md

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Fix a few minor things in PCB Calc, and update units to SI. Fixes https://gitlab.com/kicad/code/kicad/issues/7525 Fixes https://gitlab.com/kicad/code/kicad/issues/3435
5 years ago
Fix issues in translatable strings in .md files: - replace "&sdot;" not displayed on Windows (for some reason) by "&middot" - replace the double space at end of lines by the tag <br> A translatable string cannot ends by 2 spaces, because they are not really visible
4 years ago
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convert last formula to markdown. Make them translatable.
6 years ago
Update the formulas for Tee and Pi Attenuators This makes clear that we are utilizing the voltage attenuation formula while keeping the correct formulation as it is implemented in the code Fixes https://gitlab.com/kicad/code/kicad/-/issues/12659
3 years ago
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Minor editorial changes to PCB calculator, part 2 Don't use substripts in HTML if there is just a number in the subscript: "R1", not "R<sub>1</sub>", except for characteristic impedance. And of course still use "Z<sub>in</sub>", not "Zin". This is also consistent with the images.
4 years ago
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  1. ### Tee Attenuator
  2. ___a___ is attenuation in dB<br>
  3. ___Z<sub>in</sub>___ is desired input impedance in &#x2126;<br>
  4. ___Z<sub>out</sub>___ is desired output impedance in &#x2126;<br>
  6. ___K = V<sub>I</sub>/V<sub>O</sub> = 10<sup>a/20</sup>___<br>
  7. ___L = K<sup>2</sup> = 10<sup>a/10</sup>___<br>
  8. ___A = (L+1) / (L&minus;1)___<br><br>
  9. ___R2 = 2&middot;&radic;(L &middot; Z<sub>in</sub> &middot; Z<sub>out</sub>) / (L&minus;1)___<br>
  10. ___R1 = Z<sub>in</sub> &middot; A &minus; R2___<br>
  11. ___R3 = Z<sub>out</sub> &middot; A &minus; R2___