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Facebook• A practical circuit using Class B elements is the complementary pair or
"push–pull" arrangement. Here, complementary or quasi-complementary
devices are used to each amplify the opposite halves of the input signal,
which is then recombined at the output. This arrangement gives excellent
efficiency, but can suffer from the drawback that there is a small mismatch
at the "joins" between the two halves of the signal..
• Class AB sacrifices some efficiency over class B in favor of linearity, so will
always be less efficient (below 78.5%). It is typically much more efficient
than class A.
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