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This paper by Mentor Graphics’ Vladimir Dmitriev-Zdorov and Zhen Mu discusses two major issues associated with channel crosstalk that have not been fully addressed previously: models from measurements and algorithms for BER prediction.
It presents a practical solution that allows designers to add in near-end or far-end crosstalk characterized by a group of 4-port S-parameters, rather than to perform multiport parameter characterization.
The paper then presents in details two simulation approaches for channel crosstalk: synchronous and asynchronous algorithms, and considers their implementations in time and statistical domains.
Finally, it gives examples of the proposed procedures implemented together with IBIS-AMI buffer models and discusses their comparative advantages and limitations.
To download this paper, click here.
Andy Shaughnessy, Design007 Magazine
Artificial intelligence (AI) has been making inroads into a variety of industries in the past decade or so, from automobiles to medical devices. Naturally, EDA tool companies are taking a look at AI. Does AI offer a way forward for PCB design tool developers? I recently interviewed Paul Musto, director of marketing for the Board Systems Division of Mentor. We discussed Mentor’s plans for integrating AI into EDA tools, and why we may be at the very beginning of understanding the pros and cons of this new technology.
Bill Acito, Cadence Design Systems
The challenges faced by the PCB designers of today are significant. If we examine the breadth of designs, we find ever-increasing data rates and more high-speed signal routing that drive additional challenges meeting signal-quality requirements, including reflection signal loss and crosstalk issues. At the same time, designers are being asked to complete designs in shorter cycle times and in smaller form factors. They must come up with new and more complex routing strategies to better control impedance and crosstalk. Manual implementation is often time-consuming and prone to layout errors.
Chang Fei Yee, Keysight Technologies
Crosstalk is an unintentional electromagnetic (EM) field coupling between transmission lines on a PCB. This phenomenon becomes a major culprit in signal integrity (SI), contributing to the rise of bit error occurrence in data communications and electromagnetic interference (EMI). With the existence of mutual inductance and capacitance between two adjacent transmission lines on a PCB, crosstalk has become more severe due to the shorter signal rise/fall times at today’s higher data speed rates.