Title :
A Low-Power Efficient Direct Digital Frequency Synthesizer Based on New Two-Level Lookup Table
Author :
Yi, Shu-Chung ; Lee, Kun-Tse ; Chen, Jin-Jia ; Lin, Chien-Hung
Author_Institution :
Graduate Inst. of Integrated Circuit Design, NCUE, Changhua
Abstract :
This work presents a low power direct digital frequency synthesizer (DDFS) by using a new two-level lookup table algorithm. The algorithm uses trigonometric double angle formula to divide ROM lookup table into two parts. The ROM size of the proposed architecture is 25% less than that of conventional two-level table. The hardware complexity of the new DDFS architecture compared to the traditional two-level table DDFS can be omitted one multiplier. A synthesized 0.35-mu DDFS with a SFDR of -80dB, runs up to 100MHz and consumes 81-mW at 3.0v. The power efficiency is 0.81-mW/MHz, which represents an enhancement of more than 38% compared to the conventional DDFS
Keywords :
direct digital synthesis; radiocommunication; read-only storage; table lookup; direct digital frequency synthesizer; hardware complexity; trigonometric double angle formula; two-level ROM lookup table algorithm; Communication switching; Design engineering; Digital-analog conversion; Equations; Frequency conversion; Frequency synthesizers; Integrated circuit synthesis; Power engineering and energy; Read only memory; Table lookup; DDFS; Frequency Synthesizer; Low power; VLSI;
Conference_Titel :
Electrical and Computer Engineering, 2006. CCECE '06. Canadian Conference on
Conference_Location :
Ottawa, Ont.
Print_ISBN :
1-4244-0038-4
Electronic_ISBN :
1-4244-0038-4
DOI :
10.1109/CCECE.2006.277378
