PAPER SESSION 3: METHODS AND TOPOLOGIES
Digital Control of a PWM Switching Amplifier with
Toit Mouton(1), Bruno Putzeys(2).
(1) University of Stellenbosch, Western Cape, South Africa.
(2) Hypex Electronics B.V., Groningen, The Netherlands.
A digitally-controlled class-D amplifier using global
feedback is presented. The output signal of the amplifier
is sampled using a sigma-delta analog-to-digital
converter. A novel compensation strategy is used to
minimize distortion resulting from ripple feedback of
the output signal. An evaluation system, based on a
Field Programmable Gate Array, was developed and
an experimental evaluation was performed. State-ofthe-
art performance was achieved.