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Content Provider | IEEE Xplore Digital Library |
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Author | Pei-Lin Liu Yi-Ding Huang Yue Huang Shu-Qin Wan |
Copyright Year | 2010 |
Description | Author affiliation: Wuxi Institute of Technology, Jiangsu 214121, China (Pei-Lin Liu) || Physics & Electronic Engineering College, Nanyang Normal University, Henan, 473000,China (Yi-Ding Huang) || School of Information Engineering, Jiangnan University, Wuxi, Jiangsu 214000, China (Yue Huang) || China Electronics Technology Group Corporation No. 58 Research Institute, Wuxi, Jiangsu 214000, China (Shu-Qin Wan) |
Abstract | Direct digital frequency synthesizer (DDFS) plays an important role in modern digital communications. This paper proposes a novel implementation of a 300MHz direct digital frequency based on modified CORDIC in 0.35µm CMOS technology. The CORDIC algorithm is a well-know iteration method for the efficient computation of fundamental functions, but each iterate selects the rotation direction by analyzing the results of the previous iteration. In this paper, an improved redundant method is employed and the rotation directions can be predicted directly from the binary values of the initial input angle. This method allows the parallel CORDIC to making a much faster implementation possible. At the same time, pipelined accumulator and carry-save arithmetic are employed to achieve the maximum speed. The DDFS is fabricated in 0.35um N-well 2P3M CMOS process, occupied an area of 3.2×3.6mm2. The measured SFDR is 64.22dB at 20MHz output of 300MHz clock rate. |
Starting Page | 351 |
Ending Page | 353 |
File Size | 345661 |
Page Count | 3 |
File Format | |
ISBN | 9781424457977 |
e-ISBN | 9781424457984 |
DOI | 10.1109/ICSICT.2010.5667721 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2010-11-01 |
Publisher Place | China |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Clocks Frequency synthesizers Silicon CMOS technology Converters Read only memory CMOS integrated circuits |
Content Type | Text |
Resource Type | Article |
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