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From: "Bill Sloman"
Subject: Re: Constant Frequency at LOW temperature
Date: Sun, 3 Nov 2002 10:03:09 +0100
Organization: Planet Internet
NNTP-Posting-Date: 3 Nov 2002 10:02:54 GMT
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
"Arch-lab" wrote in message
> I haven't worked on this type yet... I need to create a nice stable
> frequency for a stepper... problem is that it will need to have the same
> frequency at -30 degrees C.
> What technology / theory should I be looking up for this design.
TCXO - a temperature controlled crystal oscillator. You stck the crystal in
a little oven and use a thermostat to make sure that the cyrstal and the
inside of the oven sit at about 50C or 70C.
The parts are commercially available.
Of course, you first have to work out what you mean by a "nice stable
frequency". For some applications, you might need an atomic clock as used in
(and available from) the Global Positioning System.
Give us some numbers, or a description of your application, and we might be
able to be more helpful.
Bill Sloman, Nijmegen
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