Digital Frequency Synthesizer Based on Two Coprime Moduli DDS

A new concept for direct digital synthesizer (DDS) design is presented in this brief. The originality of the method consists on the use of a traditional modulus 2 L DDS and a novel modulus (2 L -1) DDS whose outputs are digitally mixed by means of a complex multiplier. This way, the number of differ...

Full description

Saved in:

Bibliographic Details
Published in:	IEEE transactions on circuits and systems. II, Express briefs Vol. 53; no. 12; pp. 1388 - 1392
Main Authors:	Moran, D.R., Menoyo, J.G., Martin, J.L.J.
Format:	Journal Article
Language:	English
Published:	New York IEEE 01-12-2006 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:	Accumulators Algorithms Circuits Clocks Design engineering Digital Extreme values Field programmable gate arrays field-programmable gate array (FPGA) Fixed-point arithmetic Frequency synthesizers Gate arrays Logic arrays Logic design Logic devices receivers Signal synthesis Table lookup Tables Telecommunications
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	A new concept for direct digital synthesizer (DDS) design is presented in this brief. The originality of the method consists on the use of a traditional modulus 2 L DDS and a novel modulus (2 L -1) DDS whose outputs are digitally mixed by means of a complex multiplier. This way, the number of different frequencies achievable equals 2 L (2 L -1) using two independent L-bits wide accumulators. No phase truncation is required resulting in extremely low spurs, while the size of the memories for the trigonometric look-up tables is only 2 L positions. The design has been implemented in a field-programmable gate array to demonstrate its performance and logic requirements
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	1549-7747 1558-3791
DOI:	10.1109/TCSII.2006.885972