應用於生醫系統之超級再生式無線收發機

A low Power Super-Regenerative Transceiver for Biomedical System

黃詔彥(Zhao-Yan Huang)

指導教授 ： 呂學士

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.2013.10497

摘要

目前全世界正面臨著老年人口逐年增加的問題，而大部分的老年人卻深受慢性疾病所苦，由於慢性疾病必須長期的監控與治療，甚至耗費大量的醫療資源。因此，個人居家醫療已逐漸形成一個新興的市場，預估可帶來龐大的商機。個人居家醫療系統可以隨時隨地監測病人的生理資訊，使病患不需長期待在醫院。其監測設備必須具有可攜帶性以及短距離無線傳輸之功能。因此，短距離、低成本、
低傳輸速率和低功率消耗成為設計收發機的重要課題。為達成上述目標，本篇論
文提出二顆超級再生式收發機。本論文的收發機操作在台積電0.18微米製程，為了降低功率消耗，操作再低電壓1伏特，其功率消耗為490uW以及400uW。
首先介紹一顆機本型式超及再生OOK 收發機。本顆晶片先使用一個低雜訊放大器，接著引入一個新型數位控制震盪器，當它感受到訊號時，會使得接收機中的震盪器提早起振，利用其中的數位系統判斷出OOK的解調模式，其中我們使用SAR的方式控制震盪器操作再非常低的電流模式下，達到超級再生式接收機解調的關鍵，另一方面省下許多功率。
接著我們利用一些類比電路，改善第一顆超級再生式收發機中數位電路造成的雜訊，我們把所有數位電路都換成類比電路，整顆系統不需要輸入額外的數位訊號，最後去除數位周期雜訊的因素下達到整顆系統靈敏度上升，而功率損耗也較之前更進步。

關鍵字

低功率 ； 超級再生

並列摘要

The world faces the problem that the elderly, increasing year by year, suffer from chronic diseases, which need monitor and cure in long term, even consume large amount of medical resource. Thus, point of care has become a newly thriving market, and it is predicted to bring gigantic profit. Point of care system can measure the patients’ physical information in anytime and anywhere, making them not to stay in hospital by long time. Portable and wireless are required for the monitoring equipments. As a result, short distance, low cost, low transport velocity and low power-expended are the critical design topic of receiver. To accomplish those purpose above, this research propose two super-regenerative receives, operated in the producing process of 0.18um in TSMC. To reduce the consuming rate, they are operated in low voltage (1 volt), and its consuming power is 490uW and 400uW.
This research first introduce a basic super-regenerative receives. Using a Low noise amplifier in the chip, and introduce a new digital control oscillator. When receiving the signals, the oscillator will oscillator early. The demodulate mode of the OOK is determined by the digital system; and we use the method of SAR to control the operation of oscillator in very low voltage condition, then reach the key of super-regenerative receives demodulation, which saves lot of powers. Second, for decrease the clock jitter, we use some analog circuit to improve the noise produced by the first super-regenerative receives, changing all the digital circuit to analog circuit, and let the all system not to be input unnecessary digital signal. On the condition of excluding the noise, the sensitivity of the all system is increase, and its consuming power is lower than the former.

並列關鍵字

Low power ； supwer regenative receiver

參考文獻

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