PAPER SESSION 2: POWER STAGE TOPOLOGIES
2-1 A 97 Percent Efficiency Power Stage Design for
High Performance Class D Audio Amplification
René Lambruschi, Nicola Lomuto, Frédérik Dezé.
CL3, Pontoise, France.
An innovative solution of switching power conversion is
introduced, and its benefits on class D audio amplifiers
is demonstrated. The smart association of a high side
N MOSFET and a low side P MOSFET in the power
stage combines the dynamic parameters of the two
MOSFETS, so that only one drive signal is used and
the risk due to skew and unmatched thresholds is eliminated.
No dead time is needed, therefore lowering
distortion and allowing high efficiency (97 percent and
more). Exceptional sound reproduction and scale integration
in an enclosed environment are permitted. The
proposed architecture is patent pending and will be
referred to as Gemincore.