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The columns contained in this SI/PI/EMC & EMI Fundamentals section come from members of the Signal Integrity Journal community who are experts in their field and have a commitment to providing training and education in SI/PI/EMI issues for other engineers.

Coming Up: Easier Signal Integrity Simulation Setup with IBIS 7.0

There was a time when the signal integrity of connections between digital ICs could be nearly ensured by following one simple rule: don’t connect more than some maximum number of input pins to any single output pin. Often the fanout limit would be around 7. No models, no simulations. Everything we needed was in the thick books of vendor datasheets that filled our shelves, the tree-killing viral precursor to AOL installation CDs. Ah, those were the days!


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PCI Express Gen5 is Coming: What You Need to Know for Tx Measurements

While we all love increased network speed, there is an implied assumption that the backbone speeds of the internet will keep up with this rising demand placed upon it by millions of new 5G devices. PCIe 5.0 (or Gen5) represents the technology that is needed by the computer, data center, and ultimately the 5G wireless industry to enable the next generation of mobile and desktop applications. So, what is PCI Express 5.0 and how does it compare to PCI 4.0? Read on to find out.


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Shielding and Filtering Are Not Independent of One Another

I have lost count of the number of times I have been asked to fix an EMC problem, only to find that a shielding box has been designed or purchased to provide XdB up to fMAX. Or a filter has been designed or purchased with a similar specification, but to reduce cost the filter has been mounted on a printed circuit board (PCB) inside the box, with a cable from it entering or exiting the box through a plain connector.


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