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  • 115-thumb
    By Sherman Shan Chen

    Looking Under the Hood at High Speed Signaling Specs

    Want to know more about the impedance and the encoding schemes adopted by prevailing high-speed I/O (HSIO) standards including PCIe, USB, Thunderbolt, and Ethernet? By looking back at the history of standards, some interesting trends and possible future directions are revealed.

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    By Thomas Landinger

    Battery Characterization for High Speed Signaling

    The complex impedance value over frequency for an electric vehicle’s battery cell is a good measure of the internal cell temperature, the state of charge (SoC), and the state of health. Moreover, comparing the battery stack impedance with the single cell impedances can reveal upcoming high contact resistances. Read on for the details of how to do it.

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    By Douglas Brooks

    PCB Trace Current/Temperature Relationships and their Dependencies

    The ability to analyze and predict the current/temperature effects of isolated traces is helpful, but the actual temperature of a trace may be different because of uncertainties in the actual trace thickness or board material thermal conductivity coefficient. This article traces the effort to see what PCB board parameters have the most impact in determining trace temperatures, followed by a look at related PCB design considerations. Read on to learn more.

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