Revista: IEEE Trans. On Circuits and Systems II. Vol. 53. No. 12. Pp. 1388-1392. Diciembre 2006

Autores: D. Ramírez J. Gismero

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 DDS and a novel modulus (2 1) DDS whose outputs are digitally mixed by means of
a complex multiplier. This way, the number of different frequencies achievable equals 2 (2 1) using two independent -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 positions. The design has been implemented in a field-programmable gate array to demonstrate its performance and logic requirements.