Hello,
AT cut crystals can be manufactured both as a round disk or as a strip
resonator, so probably they are AT. For example, these are:
http://cfm.citizen.co.jp/english/product/pdf/HC-49_U-S.pdf and
http://cfm.citizen.co.jp/english/product/pdf/CSA-310_309.pdf
Regards,
Javier
El 13/03/2012 21:46, ALAN MELIA escribió:
hi Magnus the only "bar" resonators I have actually seen were NT flexural bar.
Modern cuts probably include all sorts of resonator modes....but are these AT cuts?
Alan
--- On Tue, 13/3/12, Magnus Danielson<[email protected]> wrote:
From: Magnus Danielson<[email protected]>
Subject: Re: [time-nuts] quartz crystal configuration in small cases
To: [email protected]
Date: Tuesday, 13 March, 2012, 17:59
On 03/13/2012 06:35 PM, ALAN MELIA
wrote:
Hi Atilla, I dont have book availabe but AT cut is a
thickness-shear vibration mode so plate area may not be an
issue ?? Just harder to make :-))
One of the AT cut oscillators I use has a crystal bar rather
than a circular plate. Being mass-produced in bulk, etched
etc. It is just a different process.
I'm sure the crystal oscillator folks here could point to
some good sources on that.
Cheers,
Magnus
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