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
Here are some of the top-paying jobs available to engineers as they grow in their careers.
As manufacturers add new technologies to their products, designing for compliance becomes more difficult. Prepare for the certification testing process. Otherwise, you increase the risk of discovering a safety issue after a product leaves the assembly line. That will cause significant time-to-market delays, be much costlier to fix, and damage your brand in the eyes of customers. 
Stratasys will be exhibiting two groundbreaking large-scale additive manufacturing technologies, as well as other new products, next month at the International Manufacturing Technology Show (IMTS) in Chicago.
Ford Motor Co. announced plans last week to join an ever-growing number of automakers who intend to produce fully autonomous vehicles in the next five years.
Two new technologies from Stratasys, created in partnership with Boeing, Ford, and Siemens, will bring accurate, repeatable manufacturing of very large thermoplastic end products, and much bigger composite parts, onto the factory floor for industries including automotive and aerospace.
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


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

Technology Marketplace

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