Title :
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
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;
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
DOI :
10.1109/ISCAS.2000.857144
