28 Jun
2012
28 Jun
'12
6:28 p.m.
It's possible to measure ESR with a sine wave
signal generator and a
;cope [...]. It gets boring fast, which is why there are ESR meters.
I would tend to think - perhaps na?vely - that ESR is based on
considering a capacitor as an ideal capacitor in series with an ideal
resistor, in which case an ordinary ohmmeter could be used to measure
ESR, provided the current it runs through the "resistance" under test
is low enough that the cap does not charge significantly during the
measurement.
Do I misunderstand? Is there more to ESR meters than just working
around the "cap charging while measuring" issue?
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