@EC8010
Well...
"ESR is frequency-dependent, temperature-dependent, and changes as components age. It is usually only an important consideration in selecting electrolytic capacitors."
https://my.avnet.com/abacus/resources/article/understanding-esr-in-electrolytic-capacitors/
I think you have some reading to do.
Well...
"ESR is frequency-dependent, temperature-dependent, and changes as components age. It is usually only an important consideration in selecting electrolytic capacitors."
https://my.avnet.com/abacus/resources/article/understanding-esr-in-electrolytic-capacitors/
I think you have some reading to do.
I looked at the article you referenced, but I think it's a bit simplistic. I would agree that ESR is temperature-dependent (especially in an electrolytic capacitor) but it really isn't frequency dependent. However... All capacitors have an imaginary capacitance in series with them. Imaginary capacitance being at right angles to capacitance puts it on the real axis, so it looks like a resistance, but with the vital difference that it is inversely proportional to frequency. I discovered about this when I accidentally measured it when I did impedance against frequency sweeps for capacitors and plotted not just the reactive element, but also the resistive element. The ideal capacitor has a very large imaginary capacitance, making its resistance very small, but it becomes noticeable at low frequencies. If you want to read up on imaginary capacitance, look for the Debye model of capacitance. Be warned that it involves serious physics.