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From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Phase locked loops and confusion.
References: <3DDED492.2B9873B0@webaccess.net> <3DDF16D8.90072F5@webaccess.net> <3DDF229B.B85180DD@ieee.org>
Date: Sat, 23 Nov 2002 12:18:50 GMT
NNTP-Posting-Date: Sat, 23 Nov 2002 04:18:50 PST
> What are you ultimately controlling with your circuit, an oscillator
> for some sort of communications device? Am I correct in assuming that
> the device frequency being controlled is quite high since you are both
> dividing it by 200 (256?) and locking onto anywhere from the 6th to well
> more than the 12th subharmonic of an already 200X reduced frequency?
> Why do you need to lock onto subharmonics anyway? Are you doing
> frequency hopping as part of an encryption scheme?
> Could you please provide more background information and design
> specifications for whatever it is you are up to. Thanks.
It's standard clock recovery from data in one case but we don't have a
big divide on that one. The other is clock recovery from data with the
requirement of generating a nuch higher clock because the ratio of the
recovered clock to the desired clock is as much as 186 I think. The
former is data read in the case of an RLL in DVD and CD. This is a
redesign of a chip that is nnot working well. The other is to obtain
headers and an embossed clock. The embossed clock is much lower than the
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons email@example.com
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