Class E/F$_3$ Tuned Power Oscillator

This paper proposes a Class E/F
₃
tuned power oscillator based on the Class E/F
₃
amplifier. The oscillator has a feedback-loop circuit and starts the oscillation in automatic. In addition, the oscillator achieves zero-voltage switching and zero-voltage derivative switching; therefore, the switching losses are reduced under high oscillation frequency. Moreover, the third harmonic tuned by providing a third harmonic series resonant circuit reduces the switch voltage stress of the mosfet sufficiently. The oscillator was designed, built and tested using an IRFR120Z power mosfet. Under the condition of the input voltage 6.003 V, following results were shown: the measured oscillation frequency was 801.6 kHz, the output power was 0.9075 W, and the power conversion efficiency was 86.24%.