In the October issue of Analog Dialogue is online and we continue the series on model-based software-defined radio system design with the objective of building a platform that will receive and decode the automatic dependent surveillance broadcast (ADS-B) transmissions from commercial aircraft. This month, our designers analyze the Mode S Extended Squitter format used in ADS-B signal transmissions and explain how to capture these Mode S signals with a receiver platform based on the AD9361 RF agile transceiver IC.
The authors then use MATLAB and Simulink tools to develop an algorithm that can decode the messages. We’re one step closer…
Our second article explains that when external overvoltage conditions are applied to an amplifier, ESD diodes can be the last line of defense between your amplifier and the catastrophic damage that can result from electrical over stress. Our expert shows us how ESD cells are implemented in an amplifier device, discusses their characteristics, and shows how they can improve the robustness of a
design. This article will interest everyone who wants and needs to enhance the survival factor of their amplifier circuit.
Okay now, so how diverse can two articles be?
Really, they’re as diverse as ADI’s customer base. Looking back through the Analog Dialogue archives, I saw an interesting note written a few years back by then editor Dan Sheingold on the history of Analog Dialogue, where he points out that its original 1967 subtitle was A journal for the exchange of operational amplifier technology. I think you’d agree that this suggests a pretty limited focus. And now, as evidenced by the two articles in this issue, Analog Dialogue addresses a wide variety of engineering concerns — from designing a complete SDR system that pulls air traffic control communications out of the ether, down to a very specific amplifier hardware refinement technique that protects an amplifier from overstress. My apologies that I’ve yet to come across an article on protecting engineers from overstress. That really might be just ahead of what’s possible.
ADI’s product diversity has greatly expanded over the years but one thing hasn’t changed: the need for us to provide peer-to-peer technical forums where engineers exchange design ideas, suggest improvements, discuss design techniques, demystify new technologies and, yes, even analyze full-blown reference designs and source code. Analog Dialogue will continue to diversify and evolve to meet that need.
Check out the October Analog Dialogue here.