TY  - JOUR
T1  - Design and Implementation on DSP of a Frequency Synthesizer
AU - , Abdessattar Chaari AU - , Kais Bouallegue 
JO  - Asian Journal of Information Technology
VL  - 6
IS  - 9
SP  - 916
EP  - 922
PY  - 2007
DA  - 2001/08/19
SN  - 1682-3915
DO  - ajit.2007.916.922
UR  - https://makhillpublications.co/view-article.php?doi=ajit.2007.916.922
KW  - PLL systems
KW  -frequency synthesis systems
KW  -analog and digital synthesis
KW  -hybrid synthesizers
KW  -controlled digital oscillator
KW  -digital signal processor DSP
AB  - Digital  synthesizers  of  frequency  are  used  extensively  in  most  technological  domains  as  the instrumentation,  the  communication  and  the  modern  telecommunications  systems.  In  this  study,  one proposes   to   present  some  techniques  of  frequency  synthesis  in  these  two  analog  and  digital  forms. The  three  basic  synthesis  techniques  are  namely  direct  analog  synthesis,  direct  digital  synthesis  and indirect  analog  synthesis.  For  the  case  of  frequency  indirect  synthesis,  we  have  used  the  technique of  Phase  Locked  Loop  PLL  in  frequency  synthesizers  design  such  as,  for  example,  fractional-N  PLL synthesizers  and  sigma-delta  fractional-N  PLL`s  synthesizers.  We  have  also  proposed  and  studied  a digital  frequency  synthesizer  functioning  as  a  digital  oscillator  to  controlled  amplitude  and  frequency. The conceived synthesizer was built from the discretization of sine function. The gotten algorithm has been implemented on the SHARC EZ-KIT Lite, based around the ADSP-21065L Digital Signal Processor DSP. The algorithm has been applied to the amplitude modulation and the frequency. The satisfactory results of implementation  have  been  presented  and  discussed  in various cases in the goal to validate the analytic study features.
ER  -