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A strong design constraint strategy carefully balances a wide range of electrical and manufacturing trade-offs. This month, we explore the key requirements, common challenges, and best practices behind building an effective constraint strategy.
All About That Route
Most designers favor manual routing, but today's interactive autorouters may be changing designers' minds by allowing users more direct control. In this issue, our expert contributors discuss a variety of manual and autorouting strategies.
Creating the Ideal Data Package
Why is it so difficult to create the ideal data package? Many of these simple errors can be alleviated by paying attention to detail—and knowing what issues to look out for. So, this month, our experts weigh in on the best practices for creating the ideal design data package for your design.
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Register Now for Eric Bogatin’s Transmission Lines 101 Sept. 29-30
September 16, 2022 | Andy Shaughnessy, Design007 MagazineEstimated reading time: 1 minute

Professor Eric Bogatin of the University of Colorado-Boulder is doing a rare live class, online, covering transmission line fundamentals. The 1.5-day Transmission Lines 101 will take place September 29-30. The tagline for the class is “Never be intimidated by transmission lines again!”
Eric is known for taking complicated signal integrity issues and breaking them down into manageable bites that everyone can understand. The course will help PCB designers and design engineers understand how signals propagate on transmission lines, how to design transmission lines using a 2D field solver, and how to interpret TDR measurements. This will be applied to both single-ended and differential transmission lines.
This course is for any engineer or technician who wants to understand what characteristic impedance really means, how to think about signals on transmission lines, and how to effectively use commercial tools to design transmission lines and interpret TDR measurements. If your job involves transmission lines, this course will bring you from zero to mastering transmission lines.
The content is presented at a level suitable for mechanical engineers, test engineers, manufacturing engineers, materials engineers, and anyone who designs circuit boards for data rates above about 10 Mbps.
The class takes place on Thursday afternoon, September 29, and all day Friday, September 30. For more information, or to register, click here.
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Showing Some Constraint: Design007 Magazine July 2025
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The Shaughnessy Report: Showing Some Constraint
07/14/2025 | Andy Shaughnessy -- Column: The Shaughnessy ReportWhen we first decided to cover strategies for setting PCB design constraints, one designer we spoke with said, “They’re not really constraints; they’re more like guardrails that prevent your design from going off a cliff.”