Title :
Delta-Sigma Modulation in Direct Digital Frequency Synthesis
Author :
Yang, Dayu ; Ni, Weining ; Dai, Foster F. ; Shi, Yin ; Jaeger, Richard C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Auburn Univ., AL
Abstract :
This paper presents comparisons of various DeltaSigma modulations in direct digital frequency synthesis. DeltaSigma modulators such as MASH, feedforward, feedback and error feedback have been implemented in both phase and frequency domains in a CMOS DDS. The DDS prototype is fabricated in a 0.35mum CMOS technology with core area of 1.7times2.1 mm and total 75 mA current. Measured DDS output demonstrates that frequency domain DeltaSigma modulation achieves better SFDR and SINAD than phase domain AE modulation
Keywords :
CMOS digital integrated circuits; circuit feedback; delta-sigma modulation; direct digital synthesis; feedforward; CMOS technology; SFDR; SINAD; delta-sigma modulation; direct digital frequency synthesis; error feedback; CMOS technology; Delta modulation; Delta-sigma modulation; Digital modulation; Feedback; Frequency domain analysis; Frequency synthesizers; Multi-stage noise shaping; Phase modulation; Prototypes; DAC; DDS; frequency synthesis; ¿¿ modulation;
Conference_Titel :
Custom Integrated Circuits Conference, 2006. CICC '06. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
1-4244-0075-9
Electronic_ISBN :
1-4244-0076-7
DOI :
10.1109/CICC.2006.320905
