### Tee Attenuator ___a___ is attenuation in dB<br> ___Z<sub>in</sub>___ is desired input impedance in Ω<br> ___Z<sub>out</sub>___ is desired output impedance in Ω<br> ___K = V<sub>I</sub>/V<sub>O</sub> = 10<sup>a/20</sup>___<br> ___L = K<sup>2</sup> = 10<sup>a/10</sup>___<br> ___A = (L+1) / (L−1)___<br><br> ___R2 = 2·√(L · Z<sub>in</sub> · Z<sub>out</sub>) / (L−1)___<br> ___R1 = Z<sub>in</sub> · A − R2___<br> ___R3 = Z<sub>out</sub> · A − R2___