HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
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!

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
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: 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.

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' ?



Partner Zone
Latest Analysis
A Frost & Sullivan study finds that increased cyber attacks are prompting a flurry of innovative protection tools.
Devices and interconnected systems are finding a foothold not only in our homes but in mainstream organizations. Here are three tips to mitigate the risk.
What makes this movie stand out from the typical high school sports story is that the teenagers are undocumented immigrants, and the big game is a NASA-sponsored marine robotics competition. Like many other Hollywood movies, however, Spare Parts only tells part of the story. What the film shows -- and doesn’t show -- raises important issues affecting STEM education in the US.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Load dump occurs when a discharged battery is disconnected while the alternator is generating current and other loads remain on the alternator circuit. If left alone, the electrical spikes and transients will be transmitted along the power line, leading to malfunctions in individual electronics/sensors or permanent damage to the vehicle’s electronic system. Bottom line: An uncontrolled load dump threatens the overall safety and reliability of the vehicle.
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
3/31/2015 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 30 - Apr3, Getting Hands-On with Cypress’ PSoC
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