The infeasibility of a zero-current switching class-E amplifier

Abstract

It has been shown that a class-E amplifier can be configured to provide nearly 100% efficiency and zero-current or zero-voltage switching. A particular configuration, which supplies zero-current switching when the transistor output capacitance is zero, is considered for the case in which the transistor output capacitance is greater than zero. Equations for the switch voltage and current, the DC input voltage and current, the output voltage and current, and powers are determined for the amplifier. The equations show that with this configuration, a zero-current-switching class-E amplifier cannot be physically realized.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>