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Class-G series audio power amplifier for subwoofer.

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Title: Class-G series audio power amplifier for subwoofer.
Authors: Murtianta, Budihardja1 budihardja.murtianta@uksw.edu, Utomo, Darmawan2 darmawan.utomo@uksw.edu, Rumaksari, Atyanta Nika2 atyanta.rumaksari@uksw.edu, Lee, Jae-Wook1 jae.lee@uksw.edu
Source: Telkomnika. Oct2024, Vol. 22 Issue 5, p1269-1279. 11p.
Subjects: Audio amplifiers, Electronic amplifiers, Signal processing, Electronic equipment, Power series
Abstract: An audio power amplifier is an electronic device used to amplify a small signal source power at the input into a large signal power at the output that is speaker. In general, audio power amplifiers use class-AB amplifiers. In the process of amplifying the signal power, there will be power losses in the amplifiers which results in relatively lower amplifier power efficiency because there is a difference between the supply and output voltage levels. In this paper a class-G series audio power amplifier for subwoofers is designed to minimize these power losses and increase the power efficiency of the amplifier. The designed amplifier voltage supply is 40 V with a maximum output power of 80 W at an 8 Ω load. The amplifier has frequency response from 20–200 Hz and gain twice. Realization of the power amplifier and measurements were carried out using the circuit maker simulator, and the measurement results of the class-G power amplifier were compared with the class-AB power amplifier. The measurement results show that both power amplifiers meet the design specifications. The proposed class-G amplifier has 0.14% larger total harmonic distortion (THD) but has 10.4% greater power efficiency advantages over the class-AB amplifier. [ABSTRACT FROM AUTHOR]
Copyright of Telkomnika is the property of Department of Electrical Engineering, Ahmad Dahlan University and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Class-G series audio power amplifier for subwoofer.
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  Data: <searchLink fieldCode="AR" term="%22Murtianta%2C+Budihardja%22">Murtianta, Budihardja</searchLink><relatesTo>1</relatesTo><i> budihardja.murtianta@uksw.edu</i><br /><searchLink fieldCode="AR" term="%22Utomo%2C+Darmawan%22">Utomo, Darmawan</searchLink><relatesTo>2</relatesTo><i> darmawan.utomo@uksw.edu</i><br /><searchLink fieldCode="AR" term="%22Rumaksari%2C+Atyanta+Nika%22">Rumaksari, Atyanta Nika</searchLink><relatesTo>2</relatesTo><i> atyanta.rumaksari@uksw.edu</i><br /><searchLink fieldCode="AR" term="%22Lee%2C+Jae-Wook%22">Lee, Jae-Wook</searchLink><relatesTo>1</relatesTo><i> jae.lee@uksw.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Telkomnika%22">Telkomnika</searchLink>. Oct2024, Vol. 22 Issue 5, p1269-1279. 11p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Audio+amplifiers%22">Audio amplifiers</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+amplifiers%22">Electronic amplifiers</searchLink><br /><searchLink fieldCode="DE" term="%22Signal+processing%22">Signal processing</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+equipment%22">Electronic equipment</searchLink><br /><searchLink fieldCode="DE" term="%22Power+series%22">Power series</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: An audio power amplifier is an electronic device used to amplify a small signal source power at the input into a large signal power at the output that is speaker. In general, audio power amplifiers use class-AB amplifiers. In the process of amplifying the signal power, there will be power losses in the amplifiers which results in relatively lower amplifier power efficiency because there is a difference between the supply and output voltage levels. In this paper a class-G series audio power amplifier for subwoofers is designed to minimize these power losses and increase the power efficiency of the amplifier. The designed amplifier voltage supply is 40 V with a maximum output power of 80 W at an 8 Ω load. The amplifier has frequency response from 20–200 Hz and gain twice. Realization of the power amplifier and measurements were carried out using the circuit maker simulator, and the measurement results of the class-G power amplifier were compared with the class-AB power amplifier. The measurement results show that both power amplifiers meet the design specifications. The proposed class-G amplifier has 0.14% larger total harmonic distortion (THD) but has 10.4% greater power efficiency advantages over the class-AB amplifier. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Telkomnika is the property of Department of Electrical Engineering, Ahmad Dahlan University and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.12928/TELKOMNIKA.v22i5.25900
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: 1269
    Subjects:
      – SubjectFull: Audio amplifiers
        Type: general
      – SubjectFull: Electronic amplifiers
        Type: general
      – SubjectFull: Signal processing
        Type: general
      – SubjectFull: Electronic equipment
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            NameFull: Rumaksari, Atyanta Nika
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            – D: 01
              M: 10
              Text: Oct2024
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              Y: 2024
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