RE: [SI-LIST] : Micro Noise

About this list Date view Thread view Subject view Author view

From: rbmccammon@mmm.com
Date: Mon Nov 08 1999 - 10:57:14 PST


Michael T. Zhang wrote:
One such example is Intel's BX-based motherboards have the optional spread
spectrum clocking feature, which modulates the clocks for processor,
chipset, memory, and PCI, but keeps the USB clock fixed.

Would you elaborate a little bit?

I have this vision of PLL's in different chips chasing
the phase of the clock, but all of them at a different phase
because of different dynamics. Do they all know the modulating
algorithm so they can predict the next phase, or is the rate
of change from one edge to the next held low enough not to be a
problem?

**** To unsubscribe from si-list: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list ****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Tue Feb 29 2000 - 11:39:42 PST