Paper Info
Title
Design of a Fully Differential Power Output Stage for a Class D Audio Amplifier Using a Single-Ended Power Supply.
Abstract
This paper presents a full-bridge discrete power output stage for a Class D audio amplifier using a single-ended power supply. The circuit receives a digital control signal with 5 V of amplitude and it generates a floating differential output voltage up to 20 V of amplitude from a single 20 V power supply voltage. Using as control signal a pulse density modulation (PDM) wave generated by an optimized 3rd order continuous-time (CT) sigma delta modulator (Sigma Delta M), the system achieves a signal-to-noise-plus-distortion ratio (SNDR) of 83.1 dB, total harmonic distortion (THD) of -89 dB and a power efficiency of 92 %, while delivering 11 W over an 8-Omega load with a signal bandwidth of 20 kHz and a sampling frequency of 1.28 MHz.
Year
DOI
Venue
2013
10.1007/978-3-642-37291-9_61
IFIP Advances in Information and Communication Technology
Keywords
Field
DocType
Class D Audio Amplifier,Output Stage,Gate Driver
Total harmonic distortion,Fully differential amplifier,Electronic engineering,Control engineering,Linear amplifier,Power supply rejection ratio,Engineering,RF power amplifier,Pulse-density modulation,Audio power,Switched-mode power supply
Conference
Volume
ISSN
Citations 
394
1868-4238
0
PageRank 
References 
Authors
0.34
3
3
Name
Order
Citations
PageRank
Pedro V. Leitão100.34
João L. A. de Melo2154.01
Nuno F. Paulino37224.92