The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design >> Analog Design >> bandwidth of arbitrary RC network
https://designers-guide.org/forum/YaBB.pl?num=1227266082

Message started by manodipan on Nov 21^st, 2008, 3:14am

Title: bandwidth of arbitrary RC network
Post by manodipan on Nov 21^st, 2008, 3:14am

Hi guys,
can you guys suggest some way to estimate approximately the bandwidth of a higher order RC network...first cut estimation is ok...thanks a lot...

Title: Re: bandwidth of arbitrary RC network
Post by buddypoor on Nov 21^st, 2008, 3:47am

I´m afraid that there will be no general procedure for estimation since the result will strongly depend on the various values for R resp.C.
Regards

Hi manodipan,
here is an idea which has come just to my mind:
There is a theory (EET:Extra Element Theorem) developped by the famous R.D. Middlebrook and extensively described from one of his former students V. VORPERIAN in his book "Fast analytical techniques for electrical and electronic circuits".
This is a method to derive formulas for each circuit in a form which enables one to evaluate the influence of the various parts just by visual inspection. Simple example: All parallel connections appear in the form X1||X2. Middlebrook calls this form "low entropy form".
Perhaps this is something interesting in the context you have described.
Regards
LvW

Title: Re: bandwidth of arbitrary RC network
Post by raja.cedt on Nov 24^th, 2008, 12:58am

hi manodeepan,
there is a general rule to estimate bw of a network(provided there is no ZEROS,COMPLEX POLES).find open circuit time constants individually and then add .
you will get approximate system time constant.inverse of that one gives bw.IN T H lee book he has explained with examples.
Thank you.

Title: Re: bandwidth of arbitrary RC network
Post by manodipan on Nov 24^th, 2008, 1:03am

Hi raja,
Thanks a lot for your reply...