
624 Network Analysis and Synthesis
The attenuation at f = 4 kHz, that is, at 400 Hz
For constant K-type HPF, we have the following:
=
=
==×
−
−
−
2
2
20 000
4 000
2522
1
1
1
cosh
cosh
,
,
cosh ()
f
f
c
.. ...
2924 4 5848 4 58486 8 686
==×
Nepers
13.8.4 Constant K-type Band-Pass Filter
A band-pass filter can be obtained by connecting a LPF
and a HPF in cascade as shown in Figure 13.35.
The circuit configuration of constant K-type BPF has
been shown in Figure 13.36.
T-section
After connecting the T-sections in cascade (series arm is
made up of series resonant circuit and short arm is made
up of parallel resonant circuit), we get a band-pass filter ...