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comparison the input scale has been reduced to one tenth, as if a
distortionless 20 dB amplifier had been added before the input. Also
for clarity the curve has been shifted to the right, and the
corresponding input swing around Ρ ' as working point is from A ' to
Β '. The positive and negative output half-cycles are now much more
nearly equal than in a. The second-harmonic distortion is too small
to read off the curve, but if calculated would be found to be one
tenth as much as in a.
Suppose now that the input is increased by 50% so as to include
the dotted portions. In contrast to the practically linear D'A', the bit
from A ' to C ' woul ...