使用 0.18-um CMOS 製程製作之射頻能量擷取器

An RF Energy Harvester in 0.18-um CMOS Technology

姜韜(Tao Chiang)

指導教授 ： 李致毅

國立臺灣大學/電機資訊學院/電子工程學研究所/碩士(2013年)

https://doi.org/10.6342/NTU.2013.01148

摘要

在本論文中，實現了一種使用 0.18-μm CMOS 製程製作之射頻能量接收器，
其中包含以下這三個重要的部分－整流器，直流轉直流轉換器以及以能量管理電
路。
這裡所採用的全橋式差動整流器，能量之轉換效率可接 80%並且擁有近 0.65V
的開路電壓，提供電路以簡單的方式起始操作。
接著是一個直流轉直流的轉換器，其目的為穩定以及提升整流器之輸出電壓
VDC到一個兩伏的電壓值，高效能的能量路徑架構，採用自動調整之電源管理能夠
達到接近最佳化的能量轉移；此外此電源管理採用全新之非同步開路以及重複循
環之操作以利降低耗電。啟動電路也為設計項目之一。
最終量測之結果在外部能量於-17dBm 時即能使電路起始操作，在輸入能量為
-15 dBm 時，整體能量傳輸效益為 35.7％，而在輸出電壓為兩伏時，靜態電流為1.56 安培。

關鍵字

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

並列摘要

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.

並列關鍵字

Energy Harvesting ； Rectifier ； DC-DC converter ； Startup Circuit ； Ultra-low-power technique

參考文獻

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