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Rich McDowell
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re: Charge-Pump Phase-Locked Loop--A Tutorial--Part I
Rich McDowell   7/11/2011 6:11:18 PM
A few comments/corrections on this article. 1. In this article, starting with the discussion of the charge pump fr no longer refers to the reference frequency out of the VCO/divider but to the input frequency (that was previously called fi. The VCO/divider frequency is called fv. 2. Eq 3.5 n is an element of odd integers 3. Eq 3.6 should be fo=1/2nTd 4. Eq 3.14 should state that {U=1, D=1} is not a PDState Thanks for the otherwise great article.

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re: Charge-Pump Phase-Locked Loop--A Tutorial--Part I
EREBUS0   7/8/2011 8:26:01 PM
Thanks for the refresher, it gave me some ideas on how to solve some signal processing issues I have been thinking about. Well done.

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re: Charge-Pump Phase-Locked Loop--A Tutorial--Part I
HjMustafa.HjMohamad   7/8/2011 10:27:03 AM
I have learn/read this PLL theory and work on its circuitary 30 years ago, but of course it utilised transistors and semoconductors device rather than chips in todays technology.

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re: Charge-Pump Phase-Locked Loop--A Tutorial--Part I
atul_iisc   7/6/2011 5:44:08 AM
Nice article. Very well written. Gives good idea about PLL design and circuits involved.

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re: Charge-Pump Phase-Locked Loop--A Tutorial--Part I
GREATTerry   7/5/2011 3:52:20 AM
Good aritcle, it refresh me a lot of fundamental stuff.

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