DocumentCode :
418135
Title :
A novel combined first and second order Lagrange interpolation sampling process for a digital class D amplifier
Author :
Adrian, Victor ; Gwee, Bah-Hwee ; Chang, Joseph S.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Nanyang Avenue, NJ, Singapore
Volume :
3
fYear :
2004
fDate :
23-26 May 2004
Abstract :
In this paper, we propose a sampling process for low voltage (1.1V) power-critical low-distortion digital class D amplifiers. The sampling process combines first and second-order Lagrange interpolation techniques to effectively increase the sampling rate without the usual overheads. The computation is also simple. The complete class D amplifier features a very low power dissipation (58.8μW), low total harmonic distortion (-85.6dB FS) and high signal-to-noise ratio (99dB FS). The power saving is ∼21% and the THD is improved by 9.8dB FS compared to a design embodying only a first order sampling process. We also provide an analysis of the power dissipation of the load power.
Keywords :
amplifiers; harmonic distortion; interpolation; low-power electronics; noise; signal sampling; 1.1 V; 58.8 muW; digital class D amplifier; first order Lagrange interpolation; load power; power dissipation; power saving; sampling process; second order Lagrange interpolation; signal-to-noise ratio; total harmonic distortion; Auditory system; Digital signal processing; Instruments; Interpolation; Lagrangian functions; Power amplifiers; Power dissipation; Pulse amplifiers; Sampling methods; Signal sampling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
Type :
conf
DOI :
10.1109/ISCAS.2004.1328726
Filename :
1328726
Link To Document :
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