Mixed-Signal Design of a Digital Input Power Amplifier for Automotive Audio Applications

Author

Saponara, Sergio ; Terreni, Pierangelo

Author_Institution

DIIEIT, Pisa Univ.

Volume

2

fYear

2006

fDate

6-10 March 2006

Firstpage

1

Lastpage

5

Abstract

With reference to digital input power amplifier for automotive audio applications, the paper presents an exhaustive exploration of the huge mixed-signal space to find optimal trade-offs among different cost-functions: distortion, efficiency, circuit complexity and sensitivity. Different architectural solutions are modelled and compared in a Simulink/Spice framework. All building blocks (i.e. oversampling filter, noise shaping, type of PWM modulation, type of feedback, power stage, LC filter) are optimized considering the whole system performance. A novel mixed-signal scheme is finally derived and prototyped

Keywords

audio-frequency amplifiers; automotive electronics; mixed analogue-digital integrated circuits; power amplifiers; LC filter; PWM modulation; Simulink/Spice framework; automotive audio; digital input power amplifier; mixed-signal design; noise shaping; oversampling filter; power stage; Automotive engineering; Complexity theory; Feedback; Noise shaping; Power amplifiers; Power filters; Power system modeling; Prototypes; Pulse width modulation; System performance;

fLanguage

English

Publisher

ieee

Conference_Titel

Design, Automation and Test in Europe, 2006. DATE '06. Proceedings

Conference_Location

Munich

Print_ISBN

3-9810801-1-4

Type

conf

DOI

10.1109/DATE.2006.243903

Filename

1657141