At 06:42 PM 2/24/2003 -0500, you wrote:
> > Note quite. It's actually the net capacitance that's expected to be in
> > parallel with the crystal. This includes the series combination of your
> > external capacitors, plus the distributed capacitance of the PCB traces
> > and the chip pins.
>
>Are you really sure, Dave?  I thought (although can't find reference right
>now) that the capacitance rating was the load capacitance required on the
>output of the crystal to produce the proper phase shift at the rated
>frequency.  I further thought that the capacitor on the input side of the
>crystal was only there to soften the edges and reduce the harmonics from
>the driver.

Yes, it IS correct, and I think we've been through this before.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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