Articles Tagged with ''impedance''

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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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Nuggets from New Orleans

One reason I enjoy attending a conference is the opportunity to browse presentations I would not ordinarily see. I always pick up something new and useful. Here are some from my recent visit to the IEEE EMC Symposium.


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Power Electronics vs. Power Integrity

The power electronics engineer and the power integrity engineer share a common goal: provide the system with the correct voltages, currents, and noise characteristics to achieve the desired performance. Unfortunately, they do not share much else. They generally use different tools, vocabulary, and figures of merit. As a result, both sides lose.


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Target Impedance Is Not Enough

Target impedance has become a standard tool when designing a power distribution network (PDN). It establishes a limit to the highest impedance the power rail on the die should see looking into the PDN. If the PDN impedance stays below this limit, even the worst-case transient current from the die will generate an acceptably low rail voltage noise.


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