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Intermodulation Distortions of Bang–Bang Control Class D Amplifiers.
- Source :
-
IEEE Transactions on Power Electronics . Dec2014, Vol. 29 Issue 12, p6604-6614. 11p. - Publication Year :
- 2014
-
Abstract
- Audio Class D amplifiers (CDAs) based on bang-bang architecture are arguably the most power efficient architecture of all CDAs reported to-date due to their sheer hardware simplicity. At this juncture, the intermodulation distortion (IMD), an imperative measure that defines fidelity, remains unreported for bang-bang CDAs. In this paper, we investigate the mechanisms of and circuit parameters affecting the IMD of bang-bang CDAs. An interesting phenomenon is that the even-order IMD which is usually negligible/unreported in other CDAs and linear amplifiers may be higher than odd-order IMD therein. We derive analytical expressions for the IMD of the ideal and practical bang-bang CDAs, and the derived expressions are verified against HSPICE simulations and on the basis of measurements on a physical bang-bang CDA. These derived analytical expressions are useful as they provide valuable insights to the design of bang-bang CDAs and how parameters can be tradedoff to improve the IMD. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 29
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 101267323
- Full Text :
- https://doi.org/10.1109/TPEL.2014.2305432