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

Författare:
Publiceringsår: 2007
Språk: Engelska
Sidor: 46-49
Dokumenttyp: Konferensbidrag
Förlag: IEEE Press

Sammanfattning

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.

Disputation

Nyckelord

  • Technology and Engineering

Övriga

Norchip
2007-11-19/2007-11-20
Aalborg, Denmark
Published
Yes

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