PAPER SESSION 2: POWER STAGE TOPOLOGIES AND IMPLEMENTATION



Output Filter Solutions for Class D Power Amplifiers: Analysis, Characterization, and Recent Developments


Carlos Ferreira(1,3,4), Beatriz Borges(2,4), Luís De Sá(3,4).
(1) Instituto Politécnico de Tomar, Portugal. (2) Universidade Técnica de Lisboa, Portugal. (3) Universidade de Coimbra, Portugal. (4) Instituto de Telecomunicações (IT), Portugal.


This paper focus class D amplifiers output filter topology’s and characterizes the tradeoffs in its design: output ripple, negative feedback loop gain, bandwidth, attenuation of differential/common components, and minimization of the system gain variation in face of load impedance changes. Recent developments in filter topologies are also discussed.


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