
Filters and Attenuators 693
Now, a bridged T-type attenuator we can write as
R
1
= (N - 1) R
0
= (3.16 - 1) 200 = 2.16 (200) = 432 W
and
R
R
N
2
0
1
200
200
=
−
=
== Ω
92.59
Therefore, the required bridged T-type attenua-
tor is shown in Figure 13.117.
13.13 MORE SOLVED PROBLEMS ON FILTERS AND ATTENUATORS
Example 13.28 Given two capacitors of 1mF each and coil L of 10 mH, compute the following:
1. Cut-off frequency and characteristic impedance at infinite frequency for an HPF.
2. Cut-off frequency and characteristic impedance at zero frequency for an LPF.
Draw the constructed sections of filters using these elements.
Solution: Given HPF is shown in ...