资料介绍
RF资料 Sheet
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Attenuator Design Tutorial
Introduction
Attenuators are devices used to adjust signal levels, to control impedance mismatch and to
isolate circuit stages.
Passive design
Passive attenuators consist of two types ‘pi’ and ‘Tee’ attenuators.
(1) Pi Attenuator
The circuit for the Pi attenuator is shown in Figure 1.
R3 Zout
Zin
R1 R2
Zin >= Zout
Figure 1 Pi Attenuator
1
L
R3 = 10 10 1 Zin * Zout
2 L
10