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| Titre: | Spurs modeling in direct digital period synthesizers related to phase accumulator truncation |
| Auteur(s): | Izouggaghen, Badre
Khouas, Abdelhakim
Savaria, Yvon |
| Mots-clés: | spurious noise frequencies
Digital Period Synthesizer (DDPS) |
| Date de publication: | 2005 |
| Editeur: | IEEE |
| Collection/Numéro: | Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on, Volume: 3;PP.389-392 |
| Résumé: | This paper presents an analytic model of the spurious
noise frequencies in Direct Digital Period Synthesizer
(DDPS) due to phase accumulator truncation. DDPS is a
new technique for frequency synthesis that takes
advantage of the speed and low jitter of a delay-lockedloop-
based frequency multipliers and the ability to
digitally control the frequency from the direct digital
synthesis technique DDS [1-2]. The most important
source of spurious noise frequencies in a DDPS circuit is
the truncation of the output of its phase accumulator.
Computing spectral analysis of DDPS circuit is a CPU
time consuming task. Based on series of analytic
calculations, a general and simple mathematical formula
of the location of spurious frequencies and their
magnitudes is predicted. This formula will help designers
analyze and develop new DDPS circuits faster |
| URI/URL: | http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/3035 |
| ISSN: | 0-78038251-X |
| Collection(s) : | Communications Internationales
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