### Split Attenuator
Attenuation is 6 dB<br>
___Z<sub>in</sub>___ is desired input impedance in &#x2126;<br>
___Z<sub>out</sub>___ is desired output impedance in &#x2126;<br>
___Z<sub>0</sub> = Z<sub>in</sub> = Z<sub>out</sub>___

___R1 = R2 = R3 = Z<sub>0</sub>/3___
