Virtually measure impedance

We always appreciate a [FesZ] video and wonder if the "Z" stands for impedance? This is the topic of his latest video series: Measuring Impedance with LTSpice. Of course, it also does its usual painstaking job of mapping the virtual world to the real world. You can see the video below.

It's quite simple. Impedance is very similar to resistance. That is, we have a ratio of voltage and current. However, since it is an AC quantity, you need a complex number to represent it and there is an associated phase shift.

We learned the mnemonic phrase "ELI the ICE man" to remind us that voltage (E) conducts current (I) in inductors (L) and the reverse for capacitance (C). Things get more complex - no pun intended - when you mix capacitors and inductors, which requires vector addition.

Keep in mind that complex numbers can appear as a real and imaginary part - in this case real resistance and "imaginary" reactance or you can show amplitude and phase angle. Both representations have their uses.

This video is only the first part of two, but we're looking forward to the next one. We are huge LTSpice fans ourselves. We also talked about impedance, if you want our opinion.