Pi Attenuator Calculator

Pi attenuator calculator allows you to quickly determine the value of resistors in a Pi attenuator circuit. Just enter the desired attenuation (in dB) and impedance (Z) to calculate the needed shunt resistors (R1) and series resistor (R2) values.

Formulas:

K = 10(attenuation / 20)
R1 = Z × ((K + 1) / (K - 1))
R2 = Z / 2 × (K - 1 / K)


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