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Basics of Dual Fractional-N Synthesizers/PLLs

Published by: Skyworks Solutions Inc.

Over the years, a number of methods have been proposed to realize fractional-N frequency synthesis that are based on the basic concepts of traditional integer-N synthesis [1,5]. Among these methods, three techniques are best known in the industry: fractional divider-based, current injection-based, and ∆Σ modulator-based fractional-N.
This White Paper describes these methods and provides a general discussion of the use of fractional-N synthesizers in a low-cost, low-power radio.
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Published: July 7, 2020 Lang: ENG
Type: Whitepaper Length: 13 pages

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