AN AMPLIFIER APPARATUS AND METHOD

摘要

An amplifier apparatus includes a comparator (20) which compares an incoming signal (19) with a number of reference potentials. A switching stage (22) is controlled by the output of the comparator (20) and is arranged to select a voltage level to be applied to one side of a load (24), such as a loudspeaker system. An amplifier/subtractor (21) is included to subtract from the incoming signal (19) a percentage of the selected voltage level applied to the load. The amplifier/subtractor (21) amplifies the incoming signal (19) minus the percentage of the selected voltage level and applies it to a second side of the load (24). Also disclosed is a method for amplifying a signal.