Abstract
A novel class AB design is described. To achieve a large output voltage swing and to avoid the offset problems associated with a class AB input stage, the non-linearity is placed between the input and the output stage. Before the output stage the signal is separated in one positive and one negative half, which are then amplified separately. For the first time this topology is used in an integrated CMOS power amplifier. It operates with p/ −2.5 V supplies and can drive more than 4 {\rm V_{pp}} into an 8 ω load.
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