A power-efficient audio amplifier combining switching and linear techniques

Ronan A.R. van der Zee; Ed (A.J.M.) van Tuijl

doi:10.1109/4.772414

A power-efficient audio amplifier combining switching and linear techniques

Ronan A.R. van der Zee, Ed (A.J.M.) van Tuijl

Research output: Contribution to journal › Article › Academic › peer-review

71 Citations (Scopus)

68 Downloads (Pure)

Abstract

Integrated class-D audio amplifiers are very power efficient but require an external LC reconstruction filter, which prevents further integration. Also due to this filter, large feedback factors are hard to realize, so that the load influences the distortion and transfer characteristics. The 30 W amplifier presented in this paper consists of a switching part that contains a much simpler filter and a linear part that ensures a low distortion and flat frequency response. The switching part of the amplifier was integrated in a BCD process. Combined with a linear part and with a loudspeaker as load, it has a flat frequency response ±0.3 dB, a dissipation that is up to five times lower than a traditional class-AB audio amplifier, and a distortion of <0.02% over power and frequency range

Original language	English
Pages (from-to)	985-991
Number of pages	7
Journal	IEEE journal of solid-state circuits
Volume	34
Issue number	7
DOIs	https://doi.org/10.1109/4.772414
Publication status	Published - 1999

Keywords

Analog circuits
Audio amplifiers
Distortion
Parallel architectures
Power amplifiers
Switching amplifiers

Access to Document

10.1109/4.772414

71 Citations
1 Conference contribution

A Power Efficient Audio Amplifier Combining Switching and Linear Techniques
van der Zee, R. A. R. & van Tuijl, A. J. M., 22 Sept 1998, Proceedings of the 24th European Solid-State Circuits Conference (ESSCIRC). Piscataway, NJ: IEEE, p. 288-291 4 p.
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Cite this

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title = "A power-efficient audio amplifier combining switching and linear techniques",

abstract = "Integrated class-D audio amplifiers are very power efficient but require an external LC reconstruction filter, which prevents further integration. Also due to this filter, large feedback factors are hard to realize, so that the load influences the distortion and transfer characteristics. The 30 W amplifier presented in this paper consists of a switching part that contains a much simpler filter and a linear part that ensures a low distortion and flat frequency response. The switching part of the amplifier was integrated in a BCD process. Combined with a linear part and with a loudspeaker as load, it has a flat frequency response ±0.3 dB, a dissipation that is up to five times lower than a traditional class-AB audio amplifier, and a distortion of <0.02% over power and frequency range",

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author = "{van der Zee}, {Ronan A.R.} and {van Tuijl}, {Ed (A.J.M.)}",

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N2 - Integrated class-D audio amplifiers are very power efficient but require an external LC reconstruction filter, which prevents further integration. Also due to this filter, large feedback factors are hard to realize, so that the load influences the distortion and transfer characteristics. The 30 W amplifier presented in this paper consists of a switching part that contains a much simpler filter and a linear part that ensures a low distortion and flat frequency response. The switching part of the amplifier was integrated in a BCD process. Combined with a linear part and with a loudspeaker as load, it has a flat frequency response ±0.3 dB, a dissipation that is up to five times lower than a traditional class-AB audio amplifier, and a distortion of <0.02% over power and frequency range

AB - Integrated class-D audio amplifiers are very power efficient but require an external LC reconstruction filter, which prevents further integration. Also due to this filter, large feedback factors are hard to realize, so that the load influences the distortion and transfer characteristics. The 30 W amplifier presented in this paper consists of a switching part that contains a much simpler filter and a linear part that ensures a low distortion and flat frequency response. The switching part of the amplifier was integrated in a BCD process. Combined with a linear part and with a loudspeaker as load, it has a flat frequency response ±0.3 dB, a dissipation that is up to five times lower than a traditional class-AB audio amplifier, and a distortion of <0.02% over power and frequency range

KW - Analog circuits

KW - Audio amplifiers

KW - Distortion

KW - Parallel architectures

KW - Power amplifiers

KW - Switching amplifiers

U2 - 10.1109/4.772414

DO - 10.1109/4.772414

M3 - Article

SN - 0018-9200

VL - 34

SP - 985

EP - 991

JO - IEEE journal of solid-state circuits

JF - IEEE journal of solid-state circuits

IS - 7

ER -

A power-efficient audio amplifier combining switching and linear techniques

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Keywords

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Research output

A Power Efficient Audio Amplifier Combining Switching and Linear Techniques

Cite this