A 13.56 MHz 88.7-PCE Voltage Doubling Rectifier Using Adaptive Delay Time and Pulse-Width Control

摘要

A voltage doubling rectifier using an adaptive pulse controller is presented to receive the low input amplitude. The adaptive pulse controller adjusts the delay time and pulse-width of the pulses in the background to control the power switches. By keeping the output voltage as high as possible, the power conversion efficiency (PCE) of this voltage doubling rectifier is enhanced. This work is fabricated in a 0.18pm CMOS process. For the input amplitude of 0.8V, an input frequency of 13.56MHz, and a load resistor of 140Ω, this rectifier achieves a PCE of 88.7%. For the input amplitude of 1.3V, the rectifier has a peak PCE of 89.3%.