π/2-mode operation of class E power amplifiers

A new derivation of the theory of idealized operation of class E power amplifiers is presented. The new derivation makes it simple to determine the current and voltage waveforms and circuit parameters associated with any value of conduction angle. A set of universal design data is presented. Conventional class E operation with a conduction angle of π radians will often be optimum, but operation with a conduction angle of π/2 can provide advantages when the switch is a bipolar transistor.