In this kind of attenuator the input impedance is always lower than the output impedance. The following formulas are used to calculate elements in this attenuator.
Formula 1
Where:
Rs is the series resistance in ohm (Ω)
Zin is the input impedance in ohm (Ω)
Zout is the output impedance in ohm (Ω)
N is the attenuation factor
Formula 2
Where:
Rp1 is the parallel resistance in ohm (Ω)
Rs is the series resistance in ohm (Ω)
Zinis the input impedance in ohm (Ω)
N is the attenuation factor
Zout is the output impedance in ohm (Ω)
Formula 3
Where:
Rp2 is the parallel resistance in ohm (Ω)
Rs is the series resistance in ohm (Ω)
N is the attenuation factor
Zout is the output impedance in ohm (Ω)
