Limit‐cycle oscillation reduction in high‐efficiency wireless power receiver

A simple and effective technique is presented to reduce the limit-cycle oscillation (LCO) in the reconfigurable rectifier for wireless power receiver. It is theoretically analysed that only one switching edge of the switching signal is needed to be synchronised and a phase-shift circuit is proposed for synchronisation. Simulation results in commercial 0.18 µm CMOS technology show that the LCO is greatly suppressed with the proposed synchronisation circuit and the output voltage ripples are much smaller compared to the conventional circuit.