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As a PCB designer, you may hear your signal integrity overlords dictate controlled impedance with a specific value and tolerance. As someone who has requested these things, I know designers have trouble with implementing this in their trace geometry. This article details what impedance is, how it is calculated, and a practical way for PCB designers to determine the proper geometry for their application. When designing high-speed serial...

Within today’s global design and manufacturing environment, moving PCB manufacturing offshore is our industry’s de facto product development process. Many believe that PCB prototyping could and should be moved offshore to take advantage of the rising skill and capability levels of the offshore resources in Taiwan, China and Korea. This has led to a crisis in the U.S. PCB prototyping industry. U.S.-based companies find it difficult to stay in...

In the last 20+ years, electronics have become increasingly more complex. Board density is always being pushed to the limits, EMC/EMI regulations evolved and got stricter, and edge rates have become smaller. Therefore, the PCB Layout engineer needs a good understanding of EMC, PDN, EMI, and SI in order to route a modern PCB with confidence. In this article we’ll talk about some of the considerations we should have in order to create a PCB...