IIIE 20352
INSTITUTO DE INVESTIGACIONES EN INGENIERIA ELECTRICA "ALFREDO DESAGES"
Unidad Ejecutora - UE
artículos
Título:
Simple Real-Time Digital PWM Implementation for class-D Amplifiers With Distortion-free Baseband
Autor/es:
CHIERCHIE, FERNANDO; PAOLINI, EDUARDO; STEFANAZZI, LEANDRO; OLIVA, ALEJANDRO RAUL
Revista:
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Editorial:
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Referencias:
Lugar: New York; Año: 2014 vol. 61 p. 5472 - 5479
ISSN:
0278-0046
Resumen:
A real-time, digital algorithm for pulse width modulation (PWM) with distortion-free baseband is developed in this paper. The algorithm not only eliminates the intrinsic baseband distortion of digital PWM but also avoids the appearance of side-bands components of the carrier in the baseband even for low switching frequencies. Previous attempts to implement digital PWM with these spectral properties required several processors due to their complexity; the proposed algorithm uses only several FIR filters and a few multiplications and additions, and therefore can run in real-time on a standard DSP. The performance of this is compared with that of uniform, double edge PWM modulator via experimental measurements for several band limited modulating signals.
