Paper Info
Title
Design-Oriented Characterisation Of Adaptive Asynchronous Sigma Delta Modulation Switching Power Amplifiers For Bandlimited Signals
Abstract
This work addresses the analysis and characterisation of an improved asynchronous Sigma-Delta modulation, targeting modulating methods for switching amplifiers, dealing with low average switching frequencies (pursuing enhanced efficiency) and high-order output filters (aiming improved reconstruction processes). This work considers bandlimited random signals, which appropriately model actual communication and audio signals, upgrades the modulator with adaptive capabilities and optimises the output filter. Simulation results show that, tracking a 1MHz-bandlimited random signal and compared with a conventional design based on a 2nd order filter PWM converter, it is feasible to reduce the switching frequency by 62% (from 10MHz down to 3,8MHz) whilst keeping the same tracking error.
Year
DOI
Venue
2009
10.1109/ISCAS.2009.5118404
ISCAS: 2009 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-5
Keywords
DocType
Citations 
cutoff frequency,pulse width modulation,switches,power amplifier,signal processing,modulation,encoding,sigma delta modulator
Conference
2
PageRank 
References 
Authors
0.47
2
4
Name
Order
Citations
PageRank
albert garcia i tormo1102.24
Alberto Poveda24915.30
Eduard Alarcón339164.43
Francesc Guinjoan48420.97