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The Pulse: New Designer’s (Partial) Guide to Fabrication

01/31/2024 | Martyn Gaudion -- Column: The Pulse
PCB designers fresh to the industry may think that once the schematic is loaded into CAD and routed out into XY data, the finished PCB is an “exact” copy of their XY data. That’s not an unreasonable assumption for basic designs. Here, I’ll outline some of a designer’s considerations related to signal integrity as designs become more complex.

Three Things to Improve High-Speed PCB Signoff, Part 2

09/27/2023 | Brad Griffin, Cadence Design Systems
Another challenge for SerDes is losses within the channel design. At high speeds, dielectric material can be very lossy, making the appropriate selection of the right material, length, etc., critical for the channel. Many questions about stackup, trace widths, and height from the ground plane need to be defined up front. Simulating a signal with a topology explorer tool extracted from the design can be used to set up and run sweep parameters and push min/max length/spacing values into the Allegro schematic constraint manager (system capture).

An Overview of Rigid-flex Design

09/13/2023 | I-Connect007 Editorial Team
For this month’s issue on rigid-flex design, we spoke with instructor Kris Moyer, who teaches the IPC class “PCB Design for Flex and Rigid-Flex Boards.” In this wide-ranging interview, Kris breaks down the hurdles facing rigid-flex designers and offers a variety of solutions for rigid board designers taking on their first rigid-flex circuits. He also provides a few horror stories to illustrate what happens if you don’t follow sound design practices, rules, and standards. And, as Kris points out, “Your fabricator is your friend.”

Elementary, Mr. Watson: Circuit Simulation, SPICE, and AI

08/21/2023 | John Watson -- Column: Elementary, Mr. Watson
According to the Federal Aviation Administration’s flight time limitations and rest requirements, a commercial pilot is restricted to 36 flight hours in a week, 100 hours in 28 days, and 1,000 hours in any calendar year. But before these pilots even start flying the friendly skies, they spend considerable time in a flight simulator. In the same way, PCB design and circuit simulations provide the same advantages: a controlled, safe environment for testing a circuit without the considerable overhead of fabricating and assembling the PCB.

A Front Row Seat for U.S. Military R&D

08/01/2023 | Andy Shaughnessy, Design007 Magazine
It must be fun to work at a job that has a place in the history of the United States. Ryan Lang can tell you all about it. Ryan is a PCB designer at the New Mexico State University’s Physical Science Laboratory, where much of the early research for rocket guidance systems took place. I recently spoke with Ryan about his job, as well as the milaero PCB design class that he took with IPC’s Kris Moyer.
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