Time-domain analysis of intermodulation distortion of closed-loop class-D amplifiers
This paper presents a time-domain analysis of the intermodulation distortion (IMD) of a closed-loop Class-D amplifier (amp) with either first- or second-order loop filter. The derived expression for the IMD indicates that there exist significant third-order intermodulation products (3rd-IMPs) within...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/99146 http://hdl.handle.net/10220/13499 |
| _version_ | 1811682617967247360 |
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| author | Yu, Jun Tan, Meng Tong Cox, Stephen Michael Goh, Wang Ling |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Yu, Jun Tan, Meng Tong Cox, Stephen Michael Goh, Wang Ling |
| author_sort | Yu, Jun |
| collection | NTU |
| description | This paper presents a time-domain analysis of the intermodulation distortion (IMD) of a closed-loop Class-D amplifier (amp) with either first- or second-order loop filter. The derived expression for the IMD indicates that there exist significant third-order intermodulation products (3rd-IMPs) within the output spectrum, which may lead to even greater distortion than the intrinsic harmonic components. In addition, the output expressions are compact, precise, and suitable for hand calculation so that the parametric relationships between the IMD and the magnitude and frequency of the input signals, as well as the effect of the loop filter design are straightforwardly investigated. In order to accurately represent the IMD performance of class-D amp, a modified testing setup is introduced to account for the dominantly large 3rd-IMPs when the International Telecommunication Union Radiocommunication Sector (ITU-R) standard is applied. |
| first_indexed | 2024-10-01T03:59:42Z |
| format | Journal Article |
| id | ntu-10356/99146 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:59:42Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/991462020-03-07T14:00:32Z Time-domain analysis of intermodulation distortion of closed-loop class-D amplifiers Yu, Jun Tan, Meng Tong Cox, Stephen Michael Goh, Wang Ling School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering This paper presents a time-domain analysis of the intermodulation distortion (IMD) of a closed-loop Class-D amplifier (amp) with either first- or second-order loop filter. The derived expression for the IMD indicates that there exist significant third-order intermodulation products (3rd-IMPs) within the output spectrum, which may lead to even greater distortion than the intrinsic harmonic components. In addition, the output expressions are compact, precise, and suitable for hand calculation so that the parametric relationships between the IMD and the magnitude and frequency of the input signals, as well as the effect of the loop filter design are straightforwardly investigated. In order to accurately represent the IMD performance of class-D amp, a modified testing setup is introduced to account for the dominantly large 3rd-IMPs when the International Telecommunication Union Radiocommunication Sector (ITU-R) standard is applied. 2013-09-16T08:19:47Z 2019-12-06T20:03:52Z 2013-09-16T08:19:47Z 2019-12-06T20:03:52Z 2011 2011 Journal Article Yu, J., Tan, M. T., Cox, S. M., & Goh, W. L. (2011). Time-Domain Analysis of Intermodulation Distortion of Closed-Loop Class-D Amplifiers. IEEE Transactions on Power Electronics, 27(5), 2453-2461. 0885-8993 https://hdl.handle.net/10356/99146 http://hdl.handle.net/10220/13499 10.1109/TPEL.2011.2171196 en IEEE transactions on power electronics © 2011 IEEE |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Yu, Jun Tan, Meng Tong Cox, Stephen Michael Goh, Wang Ling Time-domain analysis of intermodulation distortion of closed-loop class-D amplifiers |
| title | Time-domain analysis of intermodulation distortion of closed-loop class-D amplifiers |
| title_full | Time-domain analysis of intermodulation distortion of closed-loop class-D amplifiers |
| title_fullStr | Time-domain analysis of intermodulation distortion of closed-loop class-D amplifiers |
| title_full_unstemmed | Time-domain analysis of intermodulation distortion of closed-loop class-D amplifiers |
| title_short | Time-domain analysis of intermodulation distortion of closed-loop class-D amplifiers |
| title_sort | time domain analysis of intermodulation distortion of closed loop class d amplifiers |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/99146 http://hdl.handle.net/10220/13499 |
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