Design of class-DE amplifier with linear and nonlinear shunt capacitances for 25 % duty ratio

Abstract

The class-E ZVS/ZDS operation within the class-DE amplifier can be easily achieved by adding external shunt capacitances. This paper presents the analytical expressions for the design of the class-DE amplifier with the shunt capacitances composed of the linear and nonlinear capacitances for the switch-on duty ratio D=0.25. In the analysis, an equivalent linear shunt capacitance of nonlinear MOSFET output capacitance are defined and derived. The analytical results show good agreement with the experimental ones, which validates our analysis.