Re: Rectification

On Sat, 2 Nov 2024 13:48:47 +0000, liz@poppyrecords.invalid.invalid
(Liz Tuddenham) wrote:

Cursitor Doom <cd@notformail.com> wrote:
>

... At still higher frequencies, the inherent capacitance
of the diode is leaving just a flat DC voltage with no longer any
peaks visible.

>
I would have thought, if the load was resistive, you would just see the
A.C. waveform, as the self-capacitance of the diode swamped out all the
other effects.  If you have a smoothing capacitor following the diode,
that would effectively be in series with the diode's self capacitance
and the two of them would act as a capacitive divider which
progressively shorted out the power supply as the frequency increased.

You can get very nasty spikes from reverse recovery SRD effects, even
at 60 Hz, or 50 Hz in 3rd-world countries that have electricity.