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From: "Bill Shymanski"
Subject: Re: 216MHz oscillator
X-Newsreader: Microsoft Outlook Express 5.00.2919.6600
Date: Sat, 19 Oct 2002 10:28:23 -0500
NNTP-Posting-Date: Sat, 19 Oct 2002 10:27:28 CDT
Organization: MTS Internet
"Watson 'Atto Parsec' Name" wrote in message
> In article <520s9.925901$sI1.firstname.lastname@example.org>,
> email@example.com talked about...
> > hello all, i have a little problem. im trying to design a crystal
> > oscillator working at 216MHz but the problem is that there is not
> > at that frequency. i have thought about using a lower freq crystal to
> > a circuit and to take the output to a frequency multiplier. can
> > me any idea or advice? thanks very much
> You might get a 5th overtone xtal for 100 MHz, but not much higher. You
> will have to use a doubler or tripler.
Don't some little wireless gadgets use a surface wave resonator? The Digi
Key catalog lists some
Panasonic resonators at 224 MHZ; I don't know if 216 MHZ is available.
Initial frequency tolerance
and stability are much worse than a quartz crystal but may be adequate
(lacking any idea of the
purpose of the oscillator).
Anyone looking for an accessible discussion of frequency multipliers would
do well to find the ARRL or
RSGB handbooks; this is a frequent design problem in amateur radio.
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