{"id":18056,"date":"2018-01-02T08:00:06","date_gmt":"2018-01-02T16:00:06","guid":{"rendered":"http:\/\/www.autodesk.com\/products\/eagle\/blog\/?p=2058"},"modified":"2023-07-15T14:39:56","modified_gmt":"2023-07-15T21:39:56","slug":"top-5-techniques-terminating-transmission-lines","status":"publish","type":"post","link":"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/top-5-techniques-terminating-transmission-lines\/","title":{"rendered":"Everyday App Note: The Top 5 Techniques for Terminating Transmission Lines"},"content":{"rendered":"\n

Today\u2019s Everyday App Note puts an end to transmission line troubles five termination techniques. Inside you\u2019ll find wisdom from Doug Brooks, founder of UltraCAD. He\u2019ll be talking about proven strategies to reduce the risk of signal reflections with adequately terminated transmission lines.<\/span><\/p>\n\n\n\n

\"Doug
Doug Brooks, founder, and president of UltraCAD. (Image source<\/a>)<\/em><\/figcaption><\/figure>\n\n\n

Who Is This App Note For?<\/h2>\n\n\n

This app note was written at a time when circuit engineers and layout designers were two different jobs. Times have changed of course, but signal reflection problems remain just as prevalent today. <\/span><\/p>\n\n\n\n

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The effect of noise caused by signal reflection. (Image source<\/a>)<\/em><\/figcaption><\/figure>\n\n\n\n

For those of you just designing board layouts, you\u2019ll walk away with an understanding of how termination strategies work. If you\u2019re designing circuits, then you’ll be using these strategies on your schematic designs. And if you\u2019re wearing both hats, as many of us do, then you can use this knowledge at the start of your design process! <\/span><\/p>\n\n\n

Why Read This App Note?<\/h2>\n\n\n

Noise can wreak havoc on data, producing a variety of problems like overshoots, undershoots, or reflections. All of these problems ultimately lead to misreading logic states and poor signal timing.<\/span><\/p>\n\n\n\n

The key takeaway from this app note is to design traces that look like transmission lines. It\u2019s not just about limiting traces to a certain length to get that signal from the source to sink. Even long traces can properly control reflections with the strategies discussed inside.<\/span><\/p>\n\n\n\n

Some of the termination techniques discussed in this app note includes:<\/span><\/p>\n\n\n\n