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Methods For Calculating And Measuring Impedance, Part 1 Methods For Calculating And Measuring Impedance, Part 1 In a previous article, I talked about the various transmission line properties that affect impedance. In this two-part article, I will address the methods used for calculating impedance. Included at the end of Part 1 is a list of 2D field solvers along with brief descriptions of their capabilities. Part 2 of this article will address other design aspects that influence impedance, including the frequency at which impedance should be measured Read Article
Transmission Line Properties That Affect Impedance—Hidden Features Transmission Line Properties That Affect Impedance—Hidden Features Here and in several other articles published on the Altium Resource section of the company’s website, the topic of transmission line impedance has been addressed from a number of different perspectives. I have addressed transmission line impedance previously in my article, The Evolution Of Simulation Technology and Impedance and, it might seem that we may have exhausted the field of potential information that can be provided on impedance, however Read Article
The Right Termination, Of The Right Size, At The Right Place The Right Termination, Of The Right Size, At The Right Place In recent articles, I have addressed reflections, what they do to signals on transmission lines and how to control them through the use of terminations, serial and parallel. One area of confusion that continues to come up in our on-site classes regards the actual placement of terminators. This article will address this topic and hopefully provide some useful guidelines. Note: I am only addressing series and parallel terminations. Most of the Read Article
How the Fiber Weave Effect Influences High Frequency Signal Integrity How the Fiber Weave Effect Influences High Frequency Signal Integrity Orienting traces and choosing the right weave style can help compensate for the fiber weave effect. Watch out for resonances at high frequencies. Learn more in this latest PCB design blog. Read Article
Orthogonal Trace Routing PCB Pros and Cons of Orthogonal Trace Routing in Multilayer PCBs What would limit your use of orthogonal trace routing? Like most design questions, it depends on your signal speed and stackup, as well as placement in the PCB layout. Read this latest PCB design blog by expert Zachariah Peterson to learn more. Read Article
Say "Hello" to the LogiSwitch Workbench Say "Hello" to the LogiSwitch Workbench The LogiSwitch Arduino Uno Workbench Proto-Extender Kit (Image source: LogiSwitch.net) As the Indian novelist Savi Sharma once said, "Everyone has a story." While this is undoubtably true (my mother certainly has lots of them), it's also true that some peoples' stories have more richness and complexity than others. Take my chum, Mike Pelkey, for example. If you perform a Google Search on "BASE Jumping" -- that is, parachuting from a fixed Read Article
Steaming Hot Steampunk Steaming Hot Steampunk in Palmer, MA Bruce Rosenbaum astride the Hendrick's Gin Grand Garnisher (Image source: ModVic.com) There is an ever-increasing interest in steampunk these days, and a lot of people dabble in various flavors of this genre, but it's rare that you run across someone who makes a living creating steampunk artifacts. Before we proceed, perhaps we should take a step back and remind ourselves that steampunk started out as a subgenre of science fiction or science Read Article
Reflecting on Your Design—What are Reflections and What Do They Do to a Signal? Part One Reflecting on Your Design—What are Reflections and What Do They Do to a Signal? Part One In describing what happens when an electromagnetic field or wave is traveling on a transmission line, we often talk about the various things that can disrupt that wave. Among the most common of these things are reflections. Part 1 of this article will describe what reflections are and how they are caused. The second part will discuss what they do to a signal. Then, a separate article will address how reflections are controlled by terminations Read Article
Stubs On Transmission Lines—What Do They Do And How Do You Keep Them From Happening? Stubs On Transmission Lines—What Do They Do And How Do You Keep Them From Happening? In other articles we have written PCB Design For Test Structures And Tests Performed, Part 2, and How to Control Switching Signals with Terminations for Best Signal Quality, we have described how to properly account for all the various factors that impact the design of high-speed signals. Within those topics, we’ve noted that stubs along a net may have an adverse effect on the quality of those signals. But, we have not thoroughly addressed stubs Read Article
The Evolution Of Automotive Electronics The Evolution Of Automotive Electronics Design The number, functionality, and complexity of today’s automotive electronics has grown beyond leaps and bounds over the past several years. Certainly, the flagship of this technology is the Tesla automobile. But, even for those of us who can’t afford a Tesla, there is an increasingly widespread utilization of this technology in mid-range and even lower-end new cars. This article will describe the design environment represented by this technology Read Article
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