A Power Efficient Audio Amplifier Combining Switching and Linear Techniques

R.A.R. van der Zee; A.J.M. van Tuijl

A Power Efficient Audio Amplifier Combining Switching and Linear Techniques

R.A.R. van der Zee, A.J.M. van Tuijl

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

2 Citations (Scopus)

288 Downloads (Pure)

Abstract

Integrated Class D audio amplifiers are very power efficient, but require an external filter which prevents further integration. Also due to this filter, large feedback factors are hard to realise, so that the load influences the distortion- and transfer characteristics. The 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. A 30W version was realised. The switching part of the amplifier was integrated in a BCD process. Together with a linear part and with a loudspeaker as load, it has a flat frequency response +/- 0.3dB, a dissipation that is up to 5 times lower than a traditional class AB audio amplifier, and a distortion of <0.02% over power and frequency range.

Original language	English
Title of host publication	Proceedings of the 24th European Solid-State Circuits Conference (ESSCIRC)
Place of Publication	Piscataway, NJ
Publisher	IEEE
Pages	288-291
Number of pages	4
ISBN (Print)	2-86332-235-4
Publication status	Published - 22 Sep 1998
Event	24th European Solid-State Circuits Conference, ESSCIRC 1998 - The Hague, Netherlands Duration: 22 Sep 1998 → 24 Sep 1998 Conference number: 24

Conference

Conference	24th European Solid-State Circuits Conference, ESSCIRC 1998
Abbreviated title	ESSCIRC
Country	Netherlands
City	The Hague
Period	22/09/98 → 24/09/98

Keywords

Power amplifiers
Filters
Pulse width modulation
Loudspeakers
Feedback
Pulse amplifiers
Impedance
Frequency
Circuits
High power amplifiers

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Cite this

@inproceedings{d646811a6cd14f9e87e234457f9f95bb,

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 filter which prevents further integration. Also due to this filter, large feedback factors are hard to realise, so that the load influences the distortion- and transfer characteristics. The 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. A 30W version was realised. The switching part of the amplifier was integrated in a BCD process. Together with a linear part and with a loudspeaker as load, it has a flat frequency response +/- 0.3dB, a dissipation that is up to 5 times lower than a traditional class AB audio amplifier, and a distortion of <0.02% over power and frequency range.",

keywords = "Power amplifiers, Filters, Pulse width modulation, Loudspeakers, Feedback, Pulse amplifiers, Impedance, Frequency, Circuits, High power amplifiers",

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

year = "1998",

month = sep,

day = "22",

language = "English",

isbn = "2-86332-235-4",

pages = "288--291",

booktitle = "Proceedings of the 24th European Solid-State Circuits Conference (ESSCIRC)",

publisher = "IEEE",

address = "United States",

note = "24th European Solid-State Circuits Conference, ESSCIRC 1998, ESSCIRC ; Conference date: 22-09-1998 Through 24-09-1998",

}

TY - GEN

T1 - A Power Efficient Audio Amplifier Combining Switching and Linear Techniques

AU - van der Zee, R.A.R.

AU - van Tuijl, A.J.M.

N1 - Conference code: 24

PY - 1998/9/22

Y1 - 1998/9/22

N2 - Integrated Class D audio amplifiers are very power efficient, but require an external filter which prevents further integration. Also due to this filter, large feedback factors are hard to realise, so that the load influences the distortion- and transfer characteristics. The 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. A 30W version was realised. The switching part of the amplifier was integrated in a BCD process. Together with a linear part and with a loudspeaker as load, it has a flat frequency response +/- 0.3dB, a dissipation that is up to 5 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 filter which prevents further integration. Also due to this filter, large feedback factors are hard to realise, so that the load influences the distortion- and transfer characteristics. The 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. A 30W version was realised. The switching part of the amplifier was integrated in a BCD process. Together with a linear part and with a loudspeaker as load, it has a flat frequency response +/- 0.3dB, a dissipation that is up to 5 times lower than a traditional class AB audio amplifier, and a distortion of <0.02% over power and frequency range.

KW - Power amplifiers

KW - Filters

KW - Pulse width modulation

KW - Loudspeakers

KW - Feedback

KW - Pulse amplifiers

KW - Impedance

KW - Frequency

KW - Circuits

KW - High power amplifiers

M3 - Conference contribution

SN - 2-86332-235-4

SP - 288

EP - 291

BT - Proceedings of the 24th European Solid-State Circuits Conference (ESSCIRC)

PB - IEEE

CY - Piscataway, NJ

T2 - 24th European Solid-State Circuits Conference, ESSCIRC 1998

Y2 - 22 September 1998 through 24 September 1998

ER -