Title :
Zero-position coding with separated baseband in low-power class-D audio amplifiers for mobile communications
Author :
Streitenberge, M. ; Felgenhauer, F. ; Bresch, H. ; Mathis, W.
Author_Institution :
Inst. of Electromagn. Theor. & Microwave Eng., Hannover Univ., Germany
fDate :
6/23/1905 12:00:00 AM
Abstract :
A digital real-time implementation of a binary zero-position coding concept with separated baseband is presented. This coding concept applies to highly power-efficient class-D amplification for use in low-power mobile audio equipment. With its separated baseband - which by theory is free of distortion - this concept enables the design of ultra-linear class-D power amplifiers. The implemented coding system has a dynamic range of 70 dB and a separated baseband extending from 0 to 42 kHz with a resulting switching rate of only 97.6 kHz. Theory, implementation considerations, and measurement results are discussed
Keywords :
audio-frequency amplifiers; binary codes; mobile radio; power amplifiers; real-time systems; 0 to 42 kHz; 97.6 kHz; audio amplifiers; binary coding; digital real-time implementation; low-power mobile audio equipment; mobile communications; separated baseband; ultra-linear class-D power amplifiers; zero-position coding; Baseband; Distortion measurement; Dynamic range; Mobile communication; Power amplifiers; Pulse amplifiers; Pulse width modulation; Real time systems; Signal processing; Space vector pulse width modulation;
Conference_Titel :
Telecommunications in Modern Satellite, Cable and Broadcasting Service, 2001. TELSIKS 2001. 5th International Conference on
Conference_Location :
Nis
Print_ISBN :
0-7803-7228-X
DOI :
10.1109/TELSKS.2001.955839
