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kicad/pcb_calculator/attenuators/bridget_tee_formula.md

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Bridged tee attenuator:

Zin desired input impedance in Ω
Zout desired output impedance
Z0 = Zin = Zout

  • a attenuation in dB
  • L = 10a/20 (the loss)

  • R1 = Z0 * (L - 1)
  • R2 = Z0 / (L - 1)