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Zero-position coding with separated baseband in low-power class-D audio amplifiers for mobile communications

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4 Author(s)
Streitenberger, M. ; Inst. of Electromagn. Theor. & Microwave Eng., Hannover Univ., Germany ; Felgenhauer, F. ; Bresch, H. ; Mathis, W.

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

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Telecommunications in Modern Satellite, Cable and Broadcasting Service, 2001. TELSIKS 2001. 5th International Conference on  (Volume:2 )

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