The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

A 0.25W fully integrated class-d audio power amplifier in 0.35um CMOS

Author

  • Andreas Axholt
  • Filip Oredsson
  • Tony Petersson
  • Johan Wernehag
  • Henrik Sjöland

Summary, in English

A fully integrated class-D audio power amplifier using Pulse Width Modulation (PWM) technique is presented. The output stage is an H-bridge with 5.75 min wide nMOS transistors and 15 min wide pMOS transistors, which can deliver up to 0.25 W-rms to an 16 ohm load. The chip measuring 1.2x2.4 mm(2), including pads, was fabricated in a 0.35 mu m CMOS process. It uses a single 3.3 V supply and a PWM carrier frequency of 2.5 MHz. The chip was designed and simulated with Cadence IC design tools as a student project in the course IC-project and verification at Lund University. The chip was verified and works well with a measured THD+N of 0.5% and efficiency of 76% at 0.25 W-rms output power into 16 ohm.

Publishing year

2007

Language

English

Pages

46-49

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, 2007

Conference date

2007-11-19 - 2007-11-20

Conference place

Aalborg, Denmark

Status

Published

Research group

  • Elektronikkonstruktion

ISBN/ISSN/Other

  • ISBN: 978-1-4244-1516-8