Novel design procedure for MOSFET class E oscillator

This paper presents a novel design procedure for class E oscillator. It is the characteristic of the proposed design procedure that a free-running oscillator is considered as a forced oscillator and the feedback waveform is tuned to the timing of the switching. By using the proposed design procedure, it is possible to design class E oscillator that cannot be designed by the conventional one. By carrying out a circuit experiment, we find that the experimental result agrees with the calculated one, and show the validity of the proposed design procedure. The experimental measured power conversion efficiency is 89.7% under 2.8 W output power at an operating frequency 1.97 MHz.