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We at all times get pleasure from a [FesZ] video and we surprise if the “Z” stands for impedance? That’s the subject of his newest video sequence: measuring impedance with LTSpice. Of course, he additionally does his regular thorough job of mapping the digital world to the true one. You can see the video beneath.
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It is straightforward sufficient. Impedance is similar to resistance. That is to say, we’ve got a ratio of voltage and present. However, since it’s an AC amount, you want a posh quantity to signify it and there’s an related section shift.
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We realized the mnemonic phrase “ELI the ICE man” to assist keep in mind that voltage (E) leads present (I) in inductors (L) and the reverse for capacitance (C). Things get extra advanced — no pun supposed — once you combine capacitors and inductors which requires a vector addition.
Keep in thoughts that advanced numbers can seem as an actual and imaginary half — on this case, actual resistance and an “imaginary” reactance or you possibly can present a magnitude and a section angle. Both representations have their makes use of.
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This video is just half one among two, however we’re wanting ahead to the following one. We are large followers of LTSpice, ourselves. We’ve talked about impedance, too, if you need our tackle it.
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