HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Cabe Atwell
User Rank
Blogger
Re: filter symetery
Cabe Atwell   1/20/2014 5:42:14 PM
NO RATINGS
These RF posts never cease to amaze me. 

Leer
User Rank
Iron
filter symetery
Leer   12/18/2013 7:16:21 PM
NO RATINGS
Filters are a complex topic. I have designed them for over 20 years. The topic of symetery is interesting in that most are symeterical if looked at with the frequency scale in log format and if a "full bandwidth" approximation is used.The best I can suggest is to provide some references you can use to gain a better understanding of filters. "Handbook of Filter Synthesis" by Anatol I. Zverev 1967 This is great for the tables but does not provide the necessary ne-normilization equations. "Filtering in the Time and Frequency Domains" by Herman J. Blinchikoff 1976. This is an advanced text that will require some study. "The Analysis, Design, and Synthesis of Electrical Filters" by DeVerl S. Humpherys 1970. This is a graduate course in filter synthsis. "Electronic Filter Design Handbook" by Arthur B. Williams. This is an entry level book but is filled with errors so you almost need to know the material before using it. But it can provide some useful information. and last "comprehensive Filter Design" by Lee R Watkins 1997. This has a lot of useful information and most all of the de-normaiization equations as well as a host of graphs to assist in the design of filters. Good Luck!

William K.
User Rank
Platinum
Yes, the passband is non-symetrical
William K.   12/4/2013 9:21:06 PM
NO RATINGS
Thanks for the education! I have observed for many years that filter pass-bands are not symetrical, but I had not had an adequate explanation until this one. So thanks for not only explaining the cause, but also describing a solution. Of course, after those series sections are added the design is not really a simple filter any more. BUT having a good explanation is certainly worthwhile. Thanks for the educational post!

cpu
User Rank
Iron
keep the RF stories coming
cpu   12/4/2013 6:17:00 PM
NO RATINGS
I enjoy these RF stories. Keep them coming.



Partner Zone
Latest Analysis
The Internet happened.” Those three words spoken yesterday by Marc Ostertag, North America president of B&R Automation at Pacific Design & Manufacturing, now taking place in Anaheim through Feb. 11, continues to bring ever-lasting changes to our ways of life and will undoubtedly transform manufacturing.
A panel session on the advanced manufacturing workforce at the Pacific Design and Manufacturing show in Anaheim this week revealed a major skills gap.
Renesas Electronics America Inc. rolled out what is believed to be the first industrial servo drive on a chip at the Pacific Design & Manufacturing Show in Anaheim.
The winners of the 2016 Golden Mousetrap Awards were crowned last night during a live ceremony in Anaheim, Calif.
Learning to play guitar can be a long road. But a group of engineering students is going to show you how to make one that plays itself.
More:Blogs|News
Design News Webinar Series
1/28/2016 11:00 a.m. California / 2:00 p.m. New York
12/8/2015 11:00 a.m. California / 2:00 p.m. New York
2/18/2016 11:00 AM PT | 2:00 PM ET
2/24/2016 11:00 AM PT | 2:00 PM ET
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jan 11 - 15, Designing ARM Devices Using Segger Tools
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service