Analysis of a Class E rectifier with a series capacitor

The analysis, design procedure, and experimental results are presented for a Class E rectifier. The circuit consists of a diode, a series capacitor, and a second-order lowpass filter. The diode ON duty cycle and the ripple voltage are decoupled, i.e. the two parameters are determined by different circuit elements. The diode turns on at low |dv/dt| and turns off at zero dv/dt and low |di/dt|, reducing both switching losses and noise. The circuit has a step-down AC-DC voltage transfer function and therefore is especially suitable for applications in low-output-voltage power supplies. The experimental and calculated results were in good agreement