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

Publiceringsår: 2007
Språk: Engelska
Sidor: 46-49
Publikation/Tidskrift/Serie: [Host publication title missing]
Dokumenttyp: Konferensbidrag
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.


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.


  • Electrical Engineering, Electronic Engineering, Information Engineering


Norchip conference, 2007
  • Elektronikkonstruktion-lup-obsolete
  • ISBN: 978-1-4244-1516-8

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