Verification and Validation
- Blog
Juli 11, 2019
How to Calculate Trace Length from Time Delay Value for High-speed Signals
To keep a good high-speed signal quality from driver to receiver on a PCB is not an easy task for designers. One of the most challenging issues is managing the propagation delay and relative time delay mismatches. Let me take you through the process...
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- Blog
Juni 13, 2019
Get to Know Your SPICEs
PCB designers typically have little or no experience with SPICE applications. No worries, follow along with me and get to know your SPICEs!
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- Blog
Februar 28, 2019
Inside Signal Integrity: Impedance Control - Part 2
In part 1 of this blog we took a back-to-basics approach and discussed line impedance and its effects in signal integrity. As every electrical conductor comprises capacitance, an inductance, and a frequency-dependent ohmic resistance, and with increasing frequencies, these electrical characteristics will influence and distort the signal.
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- Blog
Februar 21, 2019
Inside Signal Integrity: Impedance Control - Part 1
Impedance and impedance control belong to the oldest and most often discussed topics in PCB design. They are especially important with the high-speed design when related to signal integrity. In this, the first of a two-part blog, we’ll go back to the basics of impedance/impedance control and consider what influences line impedance. In part two, we’ll set about controlling it.
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- Blog
August 16, 2018
What You Really Need to Know When You're Routing PCB Differential Pairs
Tips for when routing differential pairs - You can tell when something isn’t as clear as it should be. The same questions come up time and again. You ask three experts and get three different answers. Routing differential pairs can be like that. Why? Because “it depends” - on exactly what signals those pairs are carrying and what kind of PCB you’re creating.
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You can tell when something isn’t as clear as it should be. The same questions come up time and again. You ask three experts and get three diffe...
- Blog
August 29, 2017
A Few Thoughts on Avoiding DDR4 Layout Problems
DDR4, the fourth generation of DDR SDRAM technology, is the latest and greatest SDRAM standard and will continue to be until the fifth generation is released. The new standard features a point-to-point architecture that offers superior timing margins.
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This new approach makes it much easier to, for example, swap pins between banks, to achieve better length control.
- Blog
November 09, 2010
S-Parameters: Microwave goes Mainstream for High-Speed PCB Design Part 2
Previously I introduced you to the concept of S-Parameters, and now I’m going to explain a bit more about measuring them and simulating with S-Parameter models.
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Last week I introduced you to the concept of S-Parameters, and now I’m going to explain a bit more about measuring them and simulating with S-Pa...
- Blog
November 01, 2010
S-Parameters: Microwave goes Mainstream for High-Speed PCB Design Part 1
I’d like to explain to you in straightforward terms what S-Parameters are and why they’re so useful. When I say “straightforward”, I mean that in a technical sense, but this is a specialised area. If you’re not designing high-speed PCBs, or you don’t know much about signal integrity, you might want to tune out now.
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So here goes. Mainstream high-speed PCB design has generally followed in the slipstream of RF and microwave engineering. This is often out of nece...