[sdiy] Black Magic oscillator cans

[Jay Schwichtenberg]

Glen,

The issue I was trying to address for Tim was tunablity. With a crystal you
don't have a lot of options. Yes you can tweak crystal oscillators with
trimmer caps but you usually don't have a lot of range. The AMI chips are
pretty flexiable when the proper oscillator freq is used and programming the
pre and post dividers correctly.

Jay

> -----Original Message-----
> From: Glen [mailto:mclilith at charter.net]
> Sent: Sunday, July 20, 2003 6:04 PM
> To: Jay Schwichtenberg; synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] Black Magic oscillator cans
>
>
> At 08:27 PM 7/20/03 , Jay Schwichtenberg wrote:
> >Tim,
> >
> >Might check out some freq synthesizers or PLLs. I've used the
> AMI FS6131 and
> >FS6377 before for word clock and audio clocks before. Couple of problems
> >when using them though. You have to have a uC to control them
> and you have
> >to wait for them to stablize. There are also a number of other chips out
> >there. Start by looking in RF or radio land.
>
> This is getting pretty extreme. I mean, using a freq synthesizer
> or PLL for
> a single frequency that could be easily generated by a single-crystal
> oscillator circuit. All you need to do is get the correct crystal. I don't
> think they are that expensive. You certainly don't have to fart
> around with
> all this added complexity.
>
> Of course, this assumes that all you really want is an accurate
> 2.00024 MHz
> clock, and are not interested in a variable frequency clock.
>
>
> later,
> Glen Berry
>