Re: ESR of a cap in parallel with ceramic one

You are COMPLETELY right! In [U]everything[/U] that you said. Dr.Hung lives in Hungary, indeed, but obviously he is not Hungarian. Btw. he asks $$$ for "his" project, so, if you are interested...Re: ESR of a cap in parallel with ceramic one

You are COMPLETELY right! In [U]everything[/U] that you said. Dr.Hung lives in Hungary, indeed, but obviously he is not Hungarian. Btw. he asks $$$ for "his" project, so, if you are interested...Re: ESR of a cap in parallel with ceramic one

Re: ESR of a cap in parallel with ceramic one


Good noticed! I believe this is the case (btw. I never saw keyboard with different character layout, except, in some cases, "Z" and "Y" swap their places).

No, you misunderstood me: I meant just the opposite - instruments [I]that works with short pulses[/I] (better to say: fast series of pulses) actually [U]can do[/U] measurements in such a situations.
For example, see this meter: note 9th "point" - there is explicitly stated "small ceramic capacitor...etc.:
...

Re: ESR of a cap in parallel with ceramic one

Yes, [U]you are all right[/U], of course, if I have two or more capacitors (especially elecrolytics) in parallel there is no way to measure ESR of only one cap!
But, what drives me crazy is what theory is behind that issue with "small ceramic cap" in parallel, I know I read somewhere detailed explanation for this, but I just can't remember where! It is not related to reactance or faulty (e.g. shorted) cap. I found something on EEV-Blog-forum: one member of this forum wrote this: [I]"Unfortunately it's common practise...

Re: ESR of a cap in parallel with ceramic one

Of course that [I]"The only TRUE measurement of ESR on a capacitor is out of circuit"[/I]. But, did you ever tried to remove capacitor from PC motherboard, or some VGA card without damaging both capacitor and MB? Well, if you didn't I can tell you it is very, very hard (if not impossible)!Re: ESR of a cap in parallel with ceramic one

Of course that [I]"The only TRUE measurement of ESR on a capacitor is out of circuit"[/I]. But, did you ever tried to remove capacitor from PC motherboard, or some VGA

Hi! I'm sorry if I ask a question that has already been answered, but I couldn't find anything with search.
I have one question, and there is no better forum than "BadCaps" for this!
Namely, I am building an ESR meter and I did read somewhere (I really can't remember where) for problem with small ceramic capacitor in parallel with C.U.T.
Allegedly, certain ESR meters (that uses 100kHz test-signal or something like that) can not measure in-circuit ESR of an capacitor that is connected in parallel with cer. capacitor, as I said. I'm not a beginner in electronics, but...

Re: New Members - please post your introductions here

Hi everyone, and sorry in advance for my bad English!