[ntp:questions] Is 24PPM an Excessive Real-Time Clock Correction?

Hal Murray hal-usenet at ip-64-139-1-69.sjc.megapath.net
Thu Jul 12 19:21:42 UTC 2007

>Upgrading and Repairing PCs, 17th Edition states:
>"A crystal oscillator controls clock speeds using a sliver of quartz 
>sometimes contained in what looks like a small tin container. Newer 
>systems include the oscillator circuitry in the motherboard chipset, so 
>it might not be a visible separate component on newer boards."

The crystal itself won't get integrated into an IC anytime soon.

There is/was usually a separate clock-generator chip.  It's a typical
IC.  It would be reasonable to include that in the main chipset.
There is a lot of analog (PLL) magic rather than simple digital
logic so it isn't quite as simple as including all the old
legacy junk IO.

These are my opinions, not necessarily my employer's.  I hate spam.

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