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From: Jeroen Belleman <jeroen@nospam.please>
Newsgroups: sci.electronics.design
Subject: Re: Cap C-V test
Date: Mon, 5 May 2025 13:35:36 +0200
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On 5/5/25 13:20, Tom Del Rosso wrote:
> john larkin wrote:
>> https://www.dropbox.com/scl/fi/a7425c69k3w8wx8tqjpq5/X110_CV_Test.jpg?rlkey=pc3c0b12ncswv6ajrn148stdk&raw=1
>>
>>
>> The DUT is a Venkel 2.2 uF 100v 1812-size ceramic cap. I need to run
>> it at 48 volts. 0.8 uF is probably OK. I have room on my board so I
>> guess I'll add another cap in parallel.
>>
>> My AADE cap meter was behaving strangely here, so I measured C by
>> noting the -3 dB frequency driving the cap from a 50 ohm sine wave
>> generator.
> 
> Do inductors vary with current as well? I would guess only a little bit.

If they have magnetic cores, yes! In some conditions even hugely.

Jeroen Belleman