[time-nuts] quartz crystal configuration in small cases

Brooke Clarke brooke at pacific.net
Tue Mar 13 17:51:56 UTC 2012


Hi Attila:

What do you mean by "small"?  For example case dimensions and crystal frequency?

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/Brooke4Congress.html


Attila Kinali wrote:
> Hi,
>
> I have been reading up on quartz crystal oscillators in the past few
> weeks. Something that i couldn't figure out until now is what kind of
> configuration the small crystals use.
>
> If you read all those documents on quartz, they all show the oscillator
> "core" as a round plate, approximately 1.4cm diameter, one side, maybe
> both sides rounded (like [1]). That's all nice and good, but those
> crystalls fit only into the large cases. Even a HC-49/US has not enough
> space for such a plate. And the SMD cases are even worse.
>
> Unfortunately, my google skills failed me on finding any information
> on how the configuration of the crystal in those small cases look like
> and what oscillation modes they use.
>
> Would someone be so kind and give me a few pointers on this?
>
> Thanks in advance
>
> 			Attila Kinali
>
> [1] http://flaggedrevs.labs.wikimedia.org/wiki/File:InsideQuartzCrystal.jpg
>
>




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