This article focuses on a qualitative review of the Class A, B, AB and C “limited conduction angle” amplifier modes as well as giving some explanation on where inefficiencies appear in each.

Some of the advantages and disadvantages of each topology will be presented and the trade-offs will be briefly elaborated in an intuitive manner, through the use of computer simulation.

This article was originally published as the featured article in the February 2011 issue of the RF Globalnet Newsletter.