Content posted in June 2015
Yes, There is Such a Thing as First Harmonic Distortion
Kendall Castor-Perry 6/30/2015 9 comments
Wait a minute. Let’s see if I understand this. (Here I’m channeling you, the puzzled reader, after you’ve grabbed me in the coffee break of a Filter Wizard lecture morning). The frequency of the nth harmonic of a sinusoid is n times that of the fundamental. The nth harmonic distortion is defined as the ratio of the amplitude of the nth harmonic to the amplitude of the fundamental. So the 1st harmonic distortion is… the ratio of the amplitude of the fundamental to the amplitude of the fundamental and that’s… unity. I. Do. Not. Understand.
Courses We’ve Taken: Useful, and Not
Analog Angle 6/18/2015 4 comments
The value of engineering-related courses varies considerably, and often the ones on the periphery of the core subjects turn out to be the most useful—even if that isn’t apparent at first.
The Annual Embedded Development Survey for Planet Analog engineers
Steve Taranovich 6/15/2015 2 comments
Given that many of Planet Analog’s readers are also involved in embedded development, we bring you the Embedded Market study so that you will be aware of embedded developer concerns in this ever-evolving market as well as recent changes in processor size, latest choices for operating systems and more.
Mystery Spur Explained: Don’t Blame the DDC!
Steve Taranovich 6/12/2015 1 comment
I recently witnessed some “strange” behavior while evaluating the output spectrum one of your high-speed ADCs that incorporates a digital down converter (DDC) function. Can you explain the existence of a mystery spur?
Is Your Smartphone Tainted? The Struggle Against Conflict Minerals
Paul Pickering 6/11/2015 2 comments
If you've seen the movie “Blood Diamond", you'll be acquainted with some of the issues surrounding raw materials from conflict areas. There is ample evidence that in a conflict zone, access of both sides to valuable commodities can prolong conflicts and lead to further suffering among the civilian population, the Democratic Republic of the Congo being the best-known current example
Power Integrity: Noise
Steve Taranovich 6/9/2015 Post a comment
Power Integrity ensures that the power supply delivers the proper voltage and current to the load(s) on a circuit board or in an IC.
Puzzling Opto Circuit
Steve Taranovich 6/8/2015 14 comments
Ray Koosha, EE at SAFT America, Inc. and one of our Analog Aficionados community, sent us this circuit he found on the internet with the following comments
IMS2015 Demo Details
Jonathan Harris 6/3/2015 Post a comment
One of the questions that appeared on one of the IMS blog posts was about the details of the demonstration I had set up at the Analog Devices booth.
Optimal Step-Motor Control
Dennis Feucht 6/1/2015 Post a comment
A previous article on step-motors berated open-loop stepping and the desperate methods used to avoid missed steps and acceleration limitations. This article outlines a path to simple step-motor control that avoids all these historic step-motor problems by using closed-loop phase control of the motor.
There’s a further cool thing you can do with a spreadsheet that most SPICEs can’t. That’s to use the spreadsheet ‘solver’ functionality to adjust component values in the search for a better-fitting circuit – or even to find a set of component values for a circuit you can’t otherwise design.
Infineon MOSFETs have been embedded into PC boards by Schweizer Electronic AG
You now need to adjust component values to achieve some system goal, such as predefined frequency response or time behaviour, and there’s no closed method for working out those values.
As a member of the electronics design community, I am angry and disappointed with the recent deaths of 346 people due to the Boeing MAX 8 design
The theoretical advantages of GaN-based power transistors are now being realized in mainstream system designs. Power supplies for data centers and telecom switching racks are two application areas where GaN transistors show significant improvement in comparison to systems using best-in-class Silicon-based Superjunction devices.