A novel architecture for ROM-less sine-output direct digital frequency synthesizers by using the 2nd-order parabolic approximation

被引：18

作者：

Sodagar, AM ^{[1
]}

Lahiji, GR ^{[1
]}

机构：

[1] S Rajaee Univ, Tehran, Iran

来源：

PROCEEDINGS OF THE 2000 IEEE/EIA INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM & EXHIBITION | 2000年

关键词：

D O I：

10.1109/FREQ.2000.887367

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An extended form of the parabolic approximation, which was previously introduced by the authors, is proposed. The proposed form of the approximation is so close to the sine function that satisfies the accuracy requirements for a typical sine-output DDFS. Then, the approximation is used to develop a novel ROM-less architecture for sine-output direct digital frequency synthesizers. Based on the optimized architecture, an experimental test system is developed. Experimental results for the implemented ROM-less sine-output parabolic DDFS show that the approximation error will cause harmonic levels below the spurious level associated with the output quantization.

引用

页码：284 / 289

页数：2

共 26 条

[1] A pipelined ROM-less architecture for sine-output direct digital frequency synthesizers using the second-order parabolic approximation
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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-ANALOG AND DIGITAL SIGNAL PROCESSING, 2001, 48 (09): : 850 - 857
[2] A novel architecture for sine-output direct digital frequency synthesizers using parabolic approximation
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[5] Parabolic approximation. A new method for phase-to-amplitude conversion in sine-output direct digital frequency synthesizers
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[8] A ROM-less direct digital frequency synthesiser using a polynomial approximation
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[10] A ROM-less direct digital frequency synthesizer using
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