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Design >> High-Speed I/O Design >> Clock Accuracy and Multiplication
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Message started by gavin on Jul 22^nd, 2010, 7:51am

Title: Clock Accuracy and Multiplication
Post by gavin on Jul 22^nd, 2010, 7:51am

Hello:

If I have a 25M oscillator with an accuracy of 1PPM and I feed it into a PLL clock multiplier (x5) to generate an 125M signal, what will be the accuarcy of the 125M signal?

Thanks,
Gavin

Title: Re: Clock Accuracy and Multiplication
Post by ACWWong on Jul 22^nd, 2010, 10:55am

assuming the PLL is doing its job properly, it should be 1ppm on 125M.

Title: Re: Clock Accuracy and Multiplication
Post by gavin on Jul 23^rd, 2010, 9:38am

Thanks!

-Gavin