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Multi-level asynchronous Sigma Delta modulators for wideband switching power amplifiers

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10.1109/COMPEL.2010.5562381
 
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hdl:2117/14769

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García Tormo, Albert
Poveda López, AlbertoMés informació
Alarcón Cot, Eduardo JoséMés informacióMés informacióMés informació
Guinjoan Gispert, FranciscoMés informacióMés informacióMés informació
Document typeConference report
Defense date2010
PublisherIEEE
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
This work extends the Asynchronous ΣΔ Modulator and its Adaptive version to multi-level modulators, targeting wideband high-efficiency switching power amplifiers. The performance of these modulators is compared with the multi-level Pulse Width Modulator, the most common modulator in multilevel switching power amplifiers. Behavioural model simulation results show that, unlike the multi-level PWM (which can only be used at high switching frequencies), the Asynchronous ΣΔ Modulators can also be used at average switching frequencies close to the signal bandwidth. At high switching frequencies, the performance of all the modulators is similar. The Asynchronous ΣΔ Modulators have further and more important advantages, such as high PSRR (even at the input signal frequency), the ability of handling non-regular distributed voltage levels, or a low ratio between the average switching frequency and the maximum instantaneous switching frequency.
CitationGarcia, A. [et al.]. Multi-level asynchronous Sigma Delta modulators for wideband switching power amplifiers. A: IEEE Workshop on Computers in Power Electronics. "2010 IEEE 12th Workshop on Control and Modeling for Power Electronics (COMPEL)". Boulder, Colorado: IEEE, 2010, p. 1-8. 
URIhttp://hdl.handle.net/2117/14769
DOI10.1109/COMPEL.2010.5562381
ISBN978-1-4244-7462-2
Publisher versionhttp://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5562381
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  • EPIC - Energy Processing and Integrated Circuits - Ponències/Comunicacions de congressos [277]
  • Departament d'Enginyeria Electrònica - Ponències/Comunicacions de congressos [1.583]
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