Title :
ROM-less direct digital frequency synthesizers exploiting polynomial approximation
Author :
De Caro, D. ; Napoli, E. ; Strollo, A.G.M.
Author_Institution :
Naples Univ., Italy
Abstract :
A new approach to design a ROM-less direct digital frequency synthesizer (DDFS) is presented. An optimized polynomial interpolation technique has been used to achieve a 60 dBc or 80 dBc spurious-free dynamic range. Also, in the paper a new technique for designing efficient circuits for the evaluation of polynomial functions is presented. The new DDFS compares favorably with state of the art DDFSs designed using the CORDIC algorithm.
Keywords :
direct digital synthesis; integrated circuit design; integrated circuit testing; interpolation; logic design; logic testing; polynomial approximation; CORDIC algorithm; DDFS; ROM-less direct digital frequency synthesizers; optimized polynomial interpolation technique; polynomial approximation; polynomial function evaluation circuits; spurious-free dynamic range; Algorithm design and analysis; Circuits; Dynamic range; Frequency control; Frequency synthesizers; Hardware; Interpolation; Polynomials; Read only memory; Table lookup;
Conference_Titel :
Electronics, Circuits and Systems, 2002. 9th International Conference on
Print_ISBN :
0-7803-7596-3
DOI :
10.1109/ICECS.2002.1046202
