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Breaking the 32 Gbps barrier for serial links

February 16, 2015 by Rolf Ostergaard

Lots of interesting papers were presented at DesignCon 2015 (which is the conference for signal-integrity), all about going up in speed breaking the 32 Gbps barrier and more. I picked one to show you here because it relates directly to a brand new course we ran in Stockholm in May 2015. It’s a one-day course… Read more

Filed Under: Transmission Lines Tagged With: Courses, DesignCon, Lee Ritchey, Measurement, SI, Simulation

Twisted pair cable termination

November 16, 2013 by Rolf Ostergaard

A recent question on the Electrical Engineering Stack Exchange website, which is the closest we get to a hardware version of the hugely popular software engineering resource Stackoverflow, got me thinking of twisted pair cable termination and how bad things can really go. The user Andy sent an 80 MBps signal through a 50-meter cable… Read more

Filed Under: Transmission Lines Tagged With: Termination, Twisted Pair

Rules of thumb for 28 Gbps

October 22, 2012 by Rolf Ostergaard

Rules of thumb are probably not going to cut it anymore for high-speed designs with interfaces like USB 3.0, PCIe 3.0 and other serial links (now approaching 28Gbps on the next generation FPGA’s). So here are some rules of thumb anyways 🙂 This comes from Jim Nadolny of Samtec in this recent webinar moderated by… Read more

Filed Under: Transmission Lines Tagged With: Copper Roughness, Dielectric Loss, Loss, SI, Skin Effect

Transmission line loss calculator

February 5, 2012 by Rolf Ostergaard

AWR has one of the nicer free transmission line loss calculator apps I have seen in a long time. Highly recommended. Recently I needed to approximate a cable with the following insertion loss for a 25 cm long strip: The approximation was required for an IBIS simulation in SigExplorer, so a microstrip model would be… Read more

Filed Under: Transmission Lines

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