scholarly journals Referenced Approximation Technique for a Rom-Less Sweep Frequency Synthesizer

2016 ◽  
Vol 6 (3) ◽  
pp. 1213
Author(s):  
Atman Jbari ◽  
Larbi Bellarbi ◽  
Abdelhamid Errachid
Keyword(s):  
Frequency Analysis ◽  
Frequency Synthesizer ◽  
Trigonometric Approximation ◽  
Approximation Technique ◽  
Reference Channel ◽  
Sweep Frequency ◽  
Constant Frequency ◽  
Digital Frequency ◽  
Direct Digital Frequency Synthesizer ◽  
Simulation Results

<p>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.</p>

Referenced Approximation Technique for a Rom-Less Sweep Frequency Synthesizer

2016 ◽  
Vol 6 (3) ◽  
pp. 1213
Author(s):  
Atman Jbari ◽  
Larbi Bellarbi ◽  
Abdelhamid Errachid
Keyword(s):  
Frequency Analysis ◽  
Frequency Synthesizer ◽  
Trigonometric Approximation ◽  
Approximation Technique ◽  
Reference Channel ◽  
Sweep Frequency ◽  
Constant Frequency ◽  
Digital Frequency ◽  
Direct Digital Frequency Synthesizer ◽  
Simulation Results

<p>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.</p>

FPGA Implementation of Direct Digital Frequency Synthesizer

2013 ◽  
Vol 380-384 ◽  
pp. 3312-3315
Author(s):  
Hui Jing Yang ◽  
Fan Yu
Keyword(s):  
Frequency Synthesizer ◽  
Design Parameters ◽  
Input Output ◽  
Verilog Hdl ◽  
Digital Frequency ◽  
Quartus Ii ◽  
Direct Digital Frequency Synthesizer ◽  
Simulation Results ◽  
Phase Amplitude ◽  
Frequency Phase

Direct digital frequency synthesizer (referred to as DDS) is a kind of complete digital frequency synthesizer. In this article the principle of DDS were introduced. Set the design index of distortion and resolution, and design parameters of DDS in accordance with the index. DDS design describes by Verilog HDL, implement controlling four parameters of the waveform, frequency, phase, amplitude. Using FPGA and Quartus II/Nios IIwhich is Altera EDA software, realize DDS and its peripheral input / output and DA platform. The final direct to DDS simulation results and the overall DDS platform oscilloscope experimental data, verify the correctness of the design of DDS with the two data.

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