A Precompensation Algorithm for PWM-Based Digital Audio Amplifiers for Portable Applications

Author

Gong, Xiaoxiang ; Harris, John G.

Author_Institution

Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL

fYear

2007

fDate

27-30 May 2007

Firstpage

1577

Lastpage

1580

Abstract

A novel precompensation algorithm for a pulse width modulation (PWM)-based digital audio amplifier has been developed for portable applications. The straight line segment PWM (SLSPWM) algorithm results in both low-power and low-complexity devices. The division-free version of this algorithm modifies the algorithm by removing the division using a polynomial approximation. Both SLSPWM and division-free SLSPWM feature 16-bit quality performance with fewer calculations compared with previous works.

Keywords

audio-frequency amplifiers; compensation; polynomial approximation; pulse width modulation; 16 bit; PWM-based digital audio amplifiers; polynomial approximation; precompensation algorithm; pulse width modulation; straight line segment PWM algorithm; Approximation algorithms; Digital modulation; Finite impulse response filter; Interpolation; Nonlinear filters; Polynomials; Pulse amplifiers; Pulse generation; Pulse width modulation; Space vector pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on

Conference_Location

New Orleans, LA

Print_ISBN

1-4244-0920-9

Electronic_ISBN

1-4244-0921-7

Type

conf

DOI

10.1109/ISCAS.2007.378714

Filename

4252954