Studies of Low-Frequency Power Amplifier Class D with Operational Amplifiers and Transistors
Journal of Electrical and Electronic Engineering
Volume 5, Issue 5, October 2017, Pages: 170-179
Received: Sep. 14, 2017; Accepted: Sep. 25, 2017; Published: Oct. 13, 2017
Views 1926      Downloads 180
Karapenev Boyan Dimitrov, Department of the Communication Equipment and Technologies, Technical University of Gabrovo, Gabrovo, Bulgaria
Article Tools
Follow on us
This paper presents studies of Low-Frequency Power Amplifier class D with operational amplifiers and transistors. Their features have been presented and а selected circuit is described. The obtained results have been presented using MultiSIM software – oscillograms in specific nodes of the circuit, amplitude-frequency and phase-frequency responces and their parameters, and results of carried out Fourier and Parameter Sweep analyzes. Simulation results could be used in carrying out the optimization of its characteristics and qualitative parameters, as well as present and expected practical results. The results of performed experimental studies of implemented low-frequency power amplifier class D are presented also.
Low-Frequency Power Amplifier Class D, Studies, Qualitative Parameters
To cite this article
Karapenev Boyan Dimitrov, Studies of Low-Frequency Power Amplifier Class D with Operational Amplifiers and Transistors, Journal of Electrical and Electronic Engineering. Vol. 5, No. 5, 2017, pp. 170-179. doi: 10.11648/j.jeee.20170505.13
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
B. Karapenev, “Fundamental Principles for Building Class D Audio- Amplifiers”, Proceedings of the Union of Scientists – Ruse, series of Technical Sciences, Volume: 11, ISSN 1311-106Х, 2014, pp. 36-41.
B. Karapenev, A. Krumov, “Experimental studies of a implemented class D low power amplifier”, Collection of papers, Volume: II, International Scientific Conference UNITECH’2015, Gabrovo, ISSN 1313-230X, 2015, pp. II-57-II-62.
Chih-Min Chang, Jieh-Tsorng Wu, “A computationally-efficient PWM technique for digital class-D amplifiers”, IEEE International Symposium on Circuits and Systems (ISCAS), 2016, pp. 1946-1949.
D. McDonald, “Class D Audio-power Amplifiers: Interactive simulations assess device and filter performance”, Transim Technology Corp., January 2001.
G. Pillonnet, N. Abouchi, M. Chiollaz, P. Marguery, “High-performance simulator for digital audio class D amplifiers”, IET Circuits, Devices & Systems, Volume: 4, Issue: 1, 2010, pp. 42-47.
J. Honda and J. Adams, “Class D Audio Amplifier Basics”, Application Note AN-1071, International Rectifier, 2005.
J. Honda, “Design Features - Energy Efficiency with Class D Amplifier Modules”, Audio System Engineering International Rectifier, 2013.
Tong Ge, J. Chang, “Modelling and Technique to Improve PSRR and PS-IMD in Analog PWM Class-D Amplifiers, IEEE Transactions on Circuits and Systems II: Express Briefs, Volume: 55, Issue: 6, 2008, pp. 512-516.
Varona et al., “A Low-Voltage Fully-Monolithic ΔΣ-Based Class-D Audio Amplifier”, Proceedings of the 1999 European Solid State Circuits Conference, pp. 545-548.
X. Jiang, “Fundamentals of Audio Class D Amplifier Design: A Review of Schemes and Architectures”, IEEE Solid-State Circuits Magazine, Volume: 9, Issue: 3, 2017, pp. 14-25.
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
Tel: (001)347-983-5186