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Altera_Forum
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15 years ago

Difference between DPLL and PLL

HI!:) I saw the topic in another webpage with ambiguous answers, I thought It's interesting. So I hope someone to make it more clear. Thanks! What is PLL ? What are it's applications ? Wh...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

DPLL (digital PLL) or ADPLL (all digital PLL) is usually referring to a time discrete system. The output signal is updated synchronous to a system clock, thus a timing jitter is introduced for frequencies that aren't an integer fraction of the system clock.

In my view, the main application of DPLLs is in the generation of low and medium frequency signals.