A Radio Frequency (RF) power amplifier includes a transconductance stage,
an AC coupling element, and a cascode stage. The transconductance stage
is adapted to receive an input RF voltage signal and to produce an output
RF current signal. The cascode stage is adapted to receive an input RF
current signal and to produce an output RF voltage signal. The AC
coupling element couples between the transconductance stage and the
cascode stage and is operable to AC couple the output RF current signal
of the transconductance stage as the input RF current signal of the
cascode stage.