An RF Energy Harvester in 0.18-um CMOS Technology
Date Issued
2013
Date
2013
Author(s)
Chiang, Tao
Abstract
In this thesis, an RF energy harvesting system has been implemented in 0.18um CMOS technology, which composed of three critical parts- a rectifier, a DC-DC converter and a power management circuit.
A full-bridge differential rectifier is used in this design which can achieve close to 80% power conversion efficiency (PCE), and an output open-circuit voltage of roughly 0.65 V which can provide enough voltage for kick-up the system easily.
And the following DC-DC converter is using to stabilize and boost the output voltage of the rectifier VDC to a 2-V output voltage. An efficient power path structure
with adaptive power management is proposed to maintain close-to-optimal PCE. The control circuit consumes low power by adopting a novel open-loop asynchronous
implementation and duty-cycled operation. A startup circuit is also presented. Measurement results show minimum PIN for startup of –17 dBm, end-to-end PCE of 35.7% at PIN of –15 dBm, and quiescent current of 1.56A at VOUT of 2 V.
Subjects
能量收集
整流器
直流轉直流轉換器
啟動電路
超低功耗技術
Type
thesis
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