High-fidelity PWM inverter for audio amplification based on real-time DSP

Author

Pascual, César ; Krein, Philip T. ; Midya, Pallab ; Roeckner, Bill

Author_Institution

Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA

fYear

2000

fDate

2000

Firstpage

227

Lastpage

232

Abstract

A complete digital audio amplifier has been developed, implemented and tested. It makes use of digital signal processing and a switching power stage to provide both high fidelity and high efficiency. It includes innovative signal processing and hardware techniques. It delivers 51 W into an 8-Ω load with an efficiency of 82% and a total harmonic distortion plus noise of 0.022%

Keywords

PWM invertors; audio-frequency amplifiers; digital signal processing chips; harmonic distortion; interference (signal); signal processing; 51 W; 8 ohm; 82 percent; audio amplification; digital signal processing; hardware techniques; high efficiency; high fidelity; high-fidelity PWM inverter; natural sampling; noise shaping; real-time DSP; signal processing; switching power stage; total harmonic distortion; uniform sampling; Acoustic noise; Baseband; Digital signal processing; Low pass filters; Noise shaping; Pulse amplifiers; Pulse width modulation; Pulse width modulation inverters; Signal sampling; Switching frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Power Electronics, 2000. COMPEL 2000. The 7th Workshop on

Conference_Location

Blacksburg, VA

Print_ISBN

0-7803-6561-5

Type

conf

DOI

10.1109/CIPE.2000.904721

Filename

904721