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78 DESIGN007 MAGAZINE I MARCH 2020 1 Avoiding EMI Problems With Lee Ritchey E The I-Connect007 team met with design expert Lee Ritchey to pick his brain on EMI prob- lems and what can be done to minimize them. Lee explains the issues are almost always tied to power delivery, as well as the abundant amount of misinformation surrounding this topic. 2 Eric Bogatin Looks at EMI Root Causes and Solutions E The I-Connect007 team recently spoke with de- sign instructor and author Eric Bogatin about the EMI challenges facing PCB designers to- day. Eric is a "signal integrity evangelist" with Teledyne LeCroy, as well as an adjunct profes- sor at the University of Colorado Boulder and the technical editor of the Signal Integrity Jour- nal. In this interview, Eric explains why EMI is so prevalent and what designers and design engineers can do to avoid EMI from the start. 3 Fresh PCB Concepts: Controlled Impedance—Design to Testing E Ruben Contreras often gets questions from customers on one of his favorite subjects in PCB design: controlled imped- ance. Ruben explains how con- trolled impedance is a science, which is why he likes it; therefore, it must be designed and tested comprehensively. 4 Connect the Dots: Design Tips For Layout E As a PCB manufacturer, Sun- stone Circuits receives hun- dreds of PCB layouts repre- sented in Gerber format every week. As you might expect, they're not all created equal. Some of the layouts check every box and roll straight into manufacturing, while others need work before they can be sent to the production floor. Bob Tise and Matt Stevenson share some best practices. Lee Ritchey Ruben Contreras

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