@inproceedings{c5bdf57a631b410e8fca406847829607,
title = "Design of direct digital frequency synthesizer with high ROM compression ratio",
abstract = "A new ROM size reduction technique for direct digital frequency synthesizers (DDFS's) is proposed in this paper. In the new technique, a multiple-segment piecewise polynomial function g(x) is determined for the sinusoidal ROM table which stores the values of sin(πx/2) - g(x) instead of sin(πx/2). With use of the proposed three-segment technique for 20-bit phase to II-bit amplitude mapping, the number of ROM output bits and ROM size are reduced by 5 and 98.58%, respectively, compared to the quarter sine wave technique with comparable spectral purity. The compression ratio of the proposed technique is about 70:1. This new design can gain low power and small chip area, especially for high frequency resolution applications.",
author = "Hsu, {Li Wen} and Chang, {Dah Chung}",
year = "2005",
doi = "10.1109/ICECS.2005.4633604",
language = "???core.languages.en_GB???",
isbn = "9789972611001",
series = "Proceedings of the IEEE International Conference on Electronics, Circuits, and Systems",
booktitle = "Proceedings of the IEEE International Conference on Electronics, Circuits, and Systems",
note = "12th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2005 ; Conference date: 11-12-2005 Through 14-12-2005",
}