A ROM-Less Direct Digital Frequency Synthesizer Based on Hybrid Polynomial Approximation

In this paper, a novel design approach for a phase to sinusoid amplitude converter (PSAC) has been investigated. Two segments have been used to approximate the first sine quadrant. A first linear segment is used to fit the region near the zero point, while a second fourth-order parabolic segment is...

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Main Authors: Qahtan Khalaf Omran, Mohammad Tariqul Islam, Norbahiah Misran, Mohammad Rashed Iqbal Faruque
Format: Article
Language:English
Published: Wiley 2014-01-01
Series:The Scientific World Journal
Online Access:http://dx.doi.org/10.1155/2014/812576
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author Qahtan Khalaf Omran
Mohammad Tariqul Islam
Norbahiah Misran
Mohammad Rashed Iqbal Faruque
author_facet Qahtan Khalaf Omran
Mohammad Tariqul Islam
Norbahiah Misran
Mohammad Rashed Iqbal Faruque
author_sort Qahtan Khalaf Omran
collection DOAJ
description In this paper, a novel design approach for a phase to sinusoid amplitude converter (PSAC) has been investigated. Two segments have been used to approximate the first sine quadrant. A first linear segment is used to fit the region near the zero point, while a second fourth-order parabolic segment is used to approximate the rest of the sine curve. The phase sample, where the polynomial changed, was chosen in such a way as to achieve the maximum spurious free dynamic range (SFDR). The invented direct digital frequency synthesizer (DDFS) has been encoded in VHDL and post simulation was carried out. The synthesized architecture exhibits a promising result of 90 dBc SFDR. The targeted structure is expected to show advantages for perceptible reduction of hardware resources and power consumption as well as high clock speeds.
format Article
id doaj-art-ca187df4e8e64919a70acf1be043baed
institution Kabale University
issn 2356-6140
1537-744X
language English
publishDate 2014-01-01
publisher Wiley
record_format Article
series The Scientific World Journal
spelling doaj-art-ca187df4e8e64919a70acf1be043baed2025-02-03T05:43:56ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/812576812576A ROM-Less Direct Digital Frequency Synthesizer Based on Hybrid Polynomial ApproximationQahtan Khalaf Omran0Mohammad Tariqul Islam1Norbahiah Misran2Mohammad Rashed Iqbal Faruque3Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, MalaysiaDepartment of Electrical, Electronic and Systems Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, MalaysiaDepartment of Electrical, Electronic and Systems Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, MalaysiaInstitute of Space Science (ANGKASA), Faculty of Engineering & Built Environment Building, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, MalaysiaIn this paper, a novel design approach for a phase to sinusoid amplitude converter (PSAC) has been investigated. Two segments have been used to approximate the first sine quadrant. A first linear segment is used to fit the region near the zero point, while a second fourth-order parabolic segment is used to approximate the rest of the sine curve. The phase sample, where the polynomial changed, was chosen in such a way as to achieve the maximum spurious free dynamic range (SFDR). The invented direct digital frequency synthesizer (DDFS) has been encoded in VHDL and post simulation was carried out. The synthesized architecture exhibits a promising result of 90 dBc SFDR. The targeted structure is expected to show advantages for perceptible reduction of hardware resources and power consumption as well as high clock speeds.http://dx.doi.org/10.1155/2014/812576
spellingShingle Qahtan Khalaf Omran
Mohammad Tariqul Islam
Norbahiah Misran
Mohammad Rashed Iqbal Faruque
A ROM-Less Direct Digital Frequency Synthesizer Based on Hybrid Polynomial Approximation
The Scientific World Journal
title A ROM-Less Direct Digital Frequency Synthesizer Based on Hybrid Polynomial Approximation
title_full A ROM-Less Direct Digital Frequency Synthesizer Based on Hybrid Polynomial Approximation
title_fullStr A ROM-Less Direct Digital Frequency Synthesizer Based on Hybrid Polynomial Approximation
title_full_unstemmed A ROM-Less Direct Digital Frequency Synthesizer Based on Hybrid Polynomial Approximation
title_short A ROM-Less Direct Digital Frequency Synthesizer Based on Hybrid Polynomial Approximation
title_sort rom less direct digital frequency synthesizer based on hybrid polynomial approximation
url http://dx.doi.org/10.1155/2014/812576
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