<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Practical applications in electrical engineering often deal with analog signals, but there are employed also digital circuits and microcontrollers. Sometimes it is easier or cheaper to improvise DA and AD converters instead of using dedicated ones. This paper is a comparative analysis of how accurate the analog signals can be generated from digital systems, like Field Programmable Gate Arrays (FPGAs) using only additional passive circuits. For this analysis, different FPGAs families were tested. Two alternatives of generating analog signals were considered in this study: PWM and R2R network. The analysis has been performed for a common frequency band, from 100 Hz to 30 kHz, using a virtual instrument for building an automated test system. At 10 kHz the PWM module obtains better THD values, reaching even 0.013% and at 30 kHz the R2R module obtains better THD values, reaching even 0.222%.</p>
</abstract>

Practical applications in electrical engineering often deal with analog signals, but there are employed also digital circuits and microcontrollers. Sometimes it is easier or cheaper to improvise DA and AD converters instead of using dedicated ones. This paper is a comparative analysis of how accurate the analog signals can be generated from digital systems, like Field Programmable Gate Arrays (FPGAs) using only additional passive circuits. For this analysis, different FPGAs families were tested. Two alternatives of generating analog signals were considered in this study: PWM and R2R network. The analysis has been performed for a common frequency band, from 100 Hz to 30 kHz, using a virtual instrument for building an automated test system. At 10 kHz the PWM module obtains better THD values, reaching even 0.013% and at 30 kHz the R2R module obtains better THD values, reaching even 0.222%.

Distortion Analysis for Programmable Analog Signals Generated Using FPGA

“Gheorghe Asachi” Technical University of Iași

Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Distortion Analysis for Programmable Analog Signals Generated Using FPGA"}

Practical applications in electrical engineering often deal with analog signals, but there are employed also digital circuits and microcontrollers. Sometimes...

Distortion Analysis for Programmable Analog Signals Generated Using FPGA

Published Online: Feb 01, 2023

Page range: 49 - 65

Received: Sep 26, 2022

Accepted: Nov 12, 2022

DOI: https://doi.org/10.2478/bipie-2022-0003

Keywords
waveform generator, PWM signal, low pass filter, digital to analog converter, R2R ladder network, virtual instrument, total harmonic distortion

© 2022 Anamaria Hariton et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Distortion Analysis for Programmable Analog Signals Generated Using FPGA

Published Online: Feb 01, 2023

Page range: 49 - 65

Received: Sep 26, 2022

Accepted: Nov 12, 2022

DOI: https://doi.org/10.2478/bipie-2022-0003

Keywordswaveform generator, PWM signal, low pass filter, digital to analog converter, R2R ladder network, virtual instrument, total harmonic distortion

© 2022 Anamaria Hariton et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
waveform generator, PWM signal, low pass filter, digital to analog converter, R2R ladder network, virtual instrument, total harmonic distortion