Theory and implementation of a new type of digital power amplifier for audio applications

Author

Streitenberger, Martin ; Bresch, Helmut ; Mathis, Wolfgang

Author_Institution

Dept. of Electr. Eng., Otto von Guericke Univ. Magdeburg, Germany

Volume

1

fYear

2000

fDate

2000

Firstpage

511

Abstract

In this paper, a new approach to class-D amplifiers is presented. It incorporates the use of a binary signal exhibiting a so-called separated baseband. This enables an exactly free-of-distortion signal transfer characteristic to be achieved which is shown to be in contrast to formerly known concepts. Implementation considerations are given and measurement results of a first all-digital real-time implementation of the novel modulating scheme with reduced bandwidth are presented

Keywords

audio-frequency amplifiers; digital integrated circuits; power amplifiers; all-digital real-time implementation; audio applications; binary signal; class-D amplifiers; digital power amplifier; free-of-distortion signal transfer characteristic; modulating scheme; reduced bandwidth; separated baseband; Bandwidth; Baseband; Broadband amplifiers; Demodulation; High power amplifiers; Low pass filters; Oscillators; Power amplifiers; Power harmonic filters; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on

Conference_Location

Geneva

Print_ISBN

0-7803-5482-6

Type

conf

DOI

10.1109/ISCAS.2000.857144

Filename

857144