Title :
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
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;
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
DOI :
10.1109/ISCAS.2007.378714
