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input is progressively increased, the class-B stage comes increasingly
into operation and, at full output, supplies most of the power to the
loudspeaker. Because of the absence of standing forward bias, the
class-B stage introduces considerable crossover distortion which
can, however, be virtually eliminated by the use of the two negative
feedback loops shown in dashed lines, one embracing the class-A
stage and the other the entire amplifier. The class-B stage is regarded
as a current dumper*; alternatively the whole amplifier can be
regarded as an example of a process known as 'feed-forward error
compensation,' the class-Α stage supplyin ...