| Summary: | 碩士 === 國立臺灣大學 === 電子工程學研究所 === 102 === 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.
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