Referenced Approximation Technique for a Rom-Less Sweep Frequency Synthesizer

Atman Jbari, Larbi Bellarbi, Abdelhamid Errachid

Abstract


The main goal of this paper is to present a novel ROM-less direct digital frequency synthesizer for sweep instrumentation systems. It provides a main sweep channel for frequency analysis and a reference channel for phase and amplitude measurement block operating at constant frequency. For phase to amplitude converter, we propose a new trigonometric approximation technique based on a set of reference angles. In addition, we present the design of the proposed synthesizer and its evaluation in Matlab-Simulink environment. The simulation results illustrate the performances and demonstrate the effectiveness of our proposed circuit.


Keywords


Direct digital synthesis; Sweep frequency; Spectral analysis; SFDR; Wave approximation.

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DOI: http://doi.org/10.11591/ijece.v6i3.pp1213-1222

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International Journal of Electrical and Computer Engineering (IJECE)
p-ISSN 2088-8708, e-ISSN 2722-2578

This journal is published by the Institute of Advanced Engineering and Science (IAES) in collaboration with Intelektual Pustaka Media Utama (IPMU).