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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