HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
GlennA
User Rank
Gold
Part IV ?
GlennA   6/6/2012 2:26:24 PM
NO RATINGS
Is there going to be a Part IV describing the 'anti-alias filter' ?

Jon Titus
User Rank
Blogger
Re: Part IV ?
Jon Titus   6/6/2012 3:08:06 PM
NO RATINGS
Hi, Glenn.  Thanks for your question. I can cover anti-alias filters in another installment, but you'll find many good references and application notes.  Here's a link to one from Maxim: http://www.maxim-ic.com/app-notes/index.mvp/id/928, and one from Microchip: http://jimfranklin.info/microchipdatasheets/00699b.pdf.

Let me know if you still want more about anti-alias filters.  My upcoming columns on oversampling explain how using this technique helps eliminate an anti-alias filter for some measurements.

Nancy Golden
User Rank
Platinum
Software Solution?
Nancy Golden   7/30/2012 10:58:47 AM
NO RATINGS
Great information, Jon - I love your series and how it addresses so many relevant issues in test engineering. I was wondering since this is a mathematical function - is it possible to write a software algorithm to eliminate the unwanted data points and if so - would a hardware solution (anti-aliasing filter) or a software solution (algorithm) be more advantageous - or is that simply a matter of available resources?

Jon Titus
User Rank
Blogger
Re: Software Solution?
Jon Titus   7/30/2012 5:42:21 PM
NO RATINGS
A software algorithm would have the same problem as people.  It could not distinguish the points from the "wanted" signal from those points acquired by an almost unlimited number of higher-frequency signals.  An anti-alias filter will help.  I find it better to eliminate any source of unwanted signals--noise--as close to the source as possible.  More about filters and how to choose them in my next column.

Nancy Golden
User Rank
Platinum
Re: Software Solution?
Nancy Golden   7/30/2012 6:00:34 PM
NO RATINGS
Thanks, Jon. I agree that it is always better for the data to be "real" and noise eliminated at the source is always best which also eliminates the need for data to be massaged by software - I was just wondering if it was an option in this case. Thanks for the information!



Partner Zone
Latest Analysis
It took engineers nearly half a century to determine why the SS Schenectady, while docked quietly in a harbor off Portland, Ore. one day, suddenly snapped in half.
The medical devices behind the superbug outbreak at UCLA suffer from a design flaw that experts have been aware of for decades.
Just when you thought mobile technology couldn’t get any more personal, Procter & Gamble have come up with a way to put your mobile where your mouth is, in the form of a Bluetooth 4.0 connected toothbrush.
The grab bag of plastic and rubber materials featured in this new product slideshow are aimed at lighting applications or automotive uses. The rest are for a wide variety of industries, including aerospace, oil & gas, RF and radar, automotive, building materials, and more.
Made By Monkeys highlights products that somehow slipped by the QC cops.
More:Blogs|News
Design News Webinar Series
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Mar 9 - 13, Implementing Motor Control Designs with MCUs and FPGAs: An Introduction and Update
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


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 © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service