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An integrated 3-level fully adjustable PWM class-D audio amplifier in 0.35um CMOS

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Author

  • Jonas Lindstrand
  • Dejan Radjen
  • Robert Fitzgerald
  • Andreas Axholt
  • Henrik Sjöland

Summary, in English

A Class-D audio amplifier utilizing a fully adjustable 3-level Pulse Width Modulation (PWM) is presented. The amplifier is fully integrated in a 0.35um CMOS process, and is powered by a 3.3V power supply. The system includes an internal fully adjustable triangle-wave oscillator, which is used to generate the PWM carrier. Delivering an output power of 300mW is a differential bridge (7.5cm pMOS, 3cm nMOS), driving a 16¿ load. The THD+N of the system is less than 0.2%, and the efficiency at 300mW is 89%.

Publishing year

2008

Language

English

Pages

168-171

Publication/Series

[Host publication title missing]

Document type

Conference paper

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Conference name

Norchip Conference, 2008

Conference date

2008-11-16 - 2008-11-17

Conference place

Talinn, Estonia

Status

Published

Research group

  • Analog RF

ISBN/ISSN/Other

  • ISBN: 978-1-4244-2492-4