Click modulation: an off-line implementation

Author

Stefanazzi, Leandro ; Paolini, Eduardo ; Oliva, Alejandro

Author_Institution

Inst. de Investig. en Ing. Electr.-IIIE (UNS-CONICET), Univ. Nac. del Sur, Bahia Blanca

fYear

2008

fDate

10-13 Aug. 2008

Firstpage

946

Lastpage

949

Abstract

This paper presents an off-line implementation of click modulation for portable audio amplifiers. This technique guarantees distortion-free baseband signals and due to its low switching rate reduces power consumption in Class-D amplifiers. Simple hardware implementation is possible and theoretically, exact signal recovery (demodulation) can be performed with a low-order low-pass filter. Hardware limitations, discrete time implementation issues and experimental results are discussed.

Keywords

audio coding; audio-frequency amplifiers; demodulation; discrete time filters; low-pass filters; pulse width modulation; quantisation (signal); Class-D amplifiers; PWM; click modulation; demodulation; discrete time implementation issues; distortion-free baseband signals; encoding; hardware implementation; hardware limitations; low-order low-pass filter; off-line implementation; portable audio amplifiers; power consumption reduction; quantization effects; signal recovery; switching rate; Baseband; Demodulation; Distortion; Filtering theory; Hardware; Low pass filters; Power harmonic filters; Pulse amplifiers; Pulse width modulation; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. MWSCAS 2008. 51st Midwest Symposium on

Conference_Location

Knoxville, TN

ISSN

1548-3746

Print_ISBN

978-1-4244-2166-4

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2008.4616957

Filename

4616957