Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/18224
Title: Sigma-delta class D audio power amplifier in CMOS technology
Authors: PAN JUNLE
Keywords: Sigma-Delta modulation, feedforward, 1.5bit quantization, class D
Issue Date: 28-Dec-2009
Source: PAN JUNLE (2009-12-28). Sigma-delta class D audio power amplifier in CMOS technology. ScholarBank@NUS Repository.
Abstract: This thesis presents detail design flow of a single chip class D audio power amplifier which is realized in 0.35um CMOS technology. This design consists of a high-linear single-loop feed-forward Sigma-Delta modulator with three level quantizer and a full H-bridge output stage. The three-level quantizer effectively reduces the switching activity of the output stage, especially when the input signal amplitude is low. Hence the power efficiency is improved. Direct feedback from H-bridge output improves the linearity of the amplifier. This design has been fabricated and sample chips are tested for the performance evaluation. With 3.3-V supply voltage and 4-Ohm load, the amplifier can deliver maximum 1-W output power. The best THD+N is 0.08% at 1kHz. The PSRR measured is 64dB and the maximum power efficiency of this design is 80%.
URI: http://scholarbank.nus.edu.sg/handle/10635/18224
Appears in Collections:Master's Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
PanJL_2009.pdf2.34 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

565
checked on Dec 18, 2017

Download(s)

432
checked on Dec 18, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.