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Zener diodes in high frequencies
2

Zener diodes in high frequencies

Zener diodes in high frequencies

(OP)
Hi,

Why don't they use zener diodes in high frequencies?

Thanks.
 

RE: Zener diodes in high frequencies

Don't 'they'? We do,

Of course, that depends what you mean with high frequency.

Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

RE: Zener diodes in high frequencies

(OP)
So,I mean ,how it shows a behavior in high-Frequency?

RE: Zener diodes in high frequencies

I think the OP should practise phrasing a coherent question first, including background and parameters.
For instance, what is high frequency in his world?

Benta.

RE: Zener diodes in high frequencies

One interpretation of "high frequency" is the formal HF frequency range of 3 to 30 MHz. Same sort of possibly-formal usage as VLF, VHF, UHF, etc. Seems unlikely in this case, but I'll be generous.

About 25 or 30 years ago, I read an article where the author questioned the application of Carl's diode as "protection" in the output power amplifier final stage of low power HF transmitters. His analysis indicated that the relatively high junction capacitance of the zener diode had a larger effect than the Zener or avalanch IV curve.
 

RE: Zener diodes in high frequencies

As IR said....I quick grabbed a 10V 1/2W zener and measured 61pF.  A generic 1A 400V silicon diode was 30pF.

RE: Zener diodes in high frequencies

Was that at 0 V? The capacitance gets lower when reverse biased.

Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

RE: Zener diodes in high frequencies

(OP)
thanks guys for all infos.

RE: Zener diodes in high frequencies

Hmmm, we answered a non-specific question with non-specific answers.

We're getting good at this winky smile

Dan - Owner
http://www.Hi-TecDesigns.com

RE: Zener diodes in high frequencies

(OP)
@MacGyverS2000

I got  the non-specific my answer that I wanted. :D

 

RE: Zener diodes in high frequencies

I like btruebloods the best. All the diodes I take out to the pub just rattle on and on. I try to speak, they block me out. Truely a one way conversation.

I really am a good egg, I'm just a little scrambled!

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