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External Divider Usage in Feedback Loop of RoboClockII | Cypress

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External Divider Usage in Feedback Loop of RoboClockII

Last Updated: December 28, 2011

Is it possible to use an external divider in the feedback loop of the RoboclockII ?


The roboclockII has internal divide capability of up to divide-by-twelve. If a higher divide ratio is needed, it is possible to use external dividers in the feedback path.

However, large dividers or dividers that have an inherently long delay should be used cautiously because a large divider ratio can cause the phase detector update gaps to become excessively large.  

The maximum divider ratio in the feedback path should eb less than 16, the maximum time delay permitted in the external feedback loop is 10ns.

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