Fifth order passive LP chebyshev filter

Status
Not open for further replies.
K

karakurto

Newbie level 6
Joined
May 3, 2008
Messages
11
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,359
chebyshev filter design steps

Hi,

I am trying to design a fifth order lowpass chebyshev filter using gyrators.
I need the transfer function of fifth order passive LP chebyshev filter. I tried to obtain it by myself but got drown in the parameters. Can anyone help me or does anybody know a pdf about it? I added the photo of the passive network.
Thanks[/img]
 

Don't try to get the transfer function. Design (or find the values from tables, Matlab) your passive filter, create the signal-flow graph and from there design the active equivalent.
 


The following steps are necessary:
Alternative A:
1.) Use a filter design program to find all component values (for example:aade.com, it is free)
2.) Then you must apply the BRUTON transformation to convert all L´s into R`s and all C´s into FDNR units.
3.) Then you can realize all FDNR´s with opamps.

Alternative B: It is easier to built a 5th order filter by cascading two 2nd order active stages and one passive stage. That means not to use a passive filter as a starting point.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…