Lee Ritchey on the Impedance Equations

Created: March 20, 2019
Updated: March 16, 2020

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Resources for the Lifelong Learner A few years ago, in a recap video of AltiumLive, Dr. Eric Bogatin, the Dean of Signal Integrity Academy, stated the following: “Everybody recognizes that you have to continually grow. It’s kind of like in Alice in Wonderland. Alice is in the Red Forest, and the line goes something like this: ‘in this forest, you have to run faster and faster, just to stay in the same place!’ And I think that encapsulates where the industry is today. The most Read Article

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Part 1: Why Your PCB Design Review Process Is Obsolete and What You Can Do About It A printed circuit board (PCB) design review is a practice to review the design of a board for possible errors and issues at various stages of product development. It can range from a formal checklist with official sign-offs to a more free-form inspection of schematic drawings and PCB layouts. Some companies do it completely in-house, while others get help from design firms and contractors. In many cases, they involve their contract manufacturers Read Article

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Controlled ESR Capacitors: Should You Use Them for Power Integrity? I can’t think of a single product I’ve built that doesn’t require capacitors. We often talk a lot about effective series inductance (ESL) in capacitors and its effects on power integrity. What about effective series resistance (ESR)? Is there a technique you can use to determine the appropriate level of resistance, and can you use ESR to your advantage? Like many answers to important engineering questions, the answer is “it depends.” One type of Read Article

Efficient Heat Dissipation with SMD Heat Sinks Keeps You From Dropping PCBs In electronics, there is the possibility that your PCB can get pretty hot due to power dissipation in certain components. Whenever a component reaches an extreme temperature that goes beyond a component's safe operating range, its lifetime will be greatly reduced or the component may fail immediately. The heat-producing component being defective means the entire PCBA will need to be scrapped. There are many things to consider when dealing with Read Article

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