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

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


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.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering
Original languageEnglish
Title of host publication[Host publication title missing]
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Print)978-1-4244-1516-8
Publication statusPublished - 2007
Publication categoryResearch
EventNorchip conference, 2007 - Aalborg, Denmark
Duration: 2007 Nov 192007 Nov 20


ConferenceNorchip conference, 2007