Multiple trigonometric approximation of sine-amplitude with small ROM size for direct digital frequency synthesizers

Author

Kim, Yong Sin ; Kim, Soo Hwan ; Baek, Kwang-Hyun ; Kim, Suki ; Kang, Sung-Mo

Author_Institution

Korea Univ., Seoul, South Korea

fYear

2003

fDate

4-8 Jan. 2003

Firstpage

261

Lastpage

265

Abstract

A ROM size reduction technique based on a new sine-amplitude approximation with small ROM size for direct digital frequency synthesizers is presented. With use of the proposed multiple trigonometric approximation for 12-bit phase to 10-bit amplitude mapping, the number of ROM output bits and ROM size are reduced by 5 and 44.45%, respectively, compared to the quarter sine wave technique, with comparable spectral purity. The proposed approach is also applied to a ROM segmentation method for further ROM size reduction, which has a compression ratio of 55:1.

Keywords

CMOS digital integrated circuits; approximation theory; circuit CAD; direct digital synthesis; integrated circuit design; read-only storage; table lookup; 10 bit; 12 bit; CMOS technology; DDS; ROM segmentation method; ROM size reduction technique; ROM-based look-up table; direct digital frequency synthesizers; multiple trigonometric approximation; sine-amplitude approximation; Communication switching; Frequency synthesizers; Partitioning algorithms; Power dissipation; Propagation delay; Read only memory; Silicon compounds; Table lookup; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design, 2003. Proceedings. 16th International Conference on

ISSN

1063-9667

Print_ISBN

0-7695-1868-0

Type

conf

DOI

10.1109/ICVD.2003.1183147

Filename

1183147