應用於生理訊號檢測系統之類比前端電路

An Analog Front-end Circuit For Biomedical Signal Acquisition Systems

黃名揚(Ming-Yang Huang)

指導教授 ： 李順裕

國立中正大學/工學院/電機工程學系/碩士(2012年)

摘要

世界十大死因的前兩名分別為心血管疾病與腦血管疾病，此已成為不可忽視的重要問題。而往往這些疾病的診治需要長時間的監控其相關生理訊號，如心電圖、腦電圖等，而為了提高監控的效率，需要一個輕薄方便攜帶，且低功率消耗與高解析度的無線生理訊號檢測系統。
本論文所實現的生理訊號檢測類比前端電路則是為了能達到上述目標所提出，並且不同於傳統的生理訊號檢測系統，本論文提出一應用在無線傳輸檢測系統上，能更簡化其電路設計的架構，並且定義生理訊號頻寬為200 Hz，整體系統有效位元數為12位元，功率消耗約為28.5μW。電路實現部分則是採用TSMC 0.18μm 1P6M製程實現一個類比前端電路架構，其中包含截波穩定型前置放大器與三階Feedforward架構的高通三角積分調變器，其系統量測結果顯示SFDR為72dB。供應電壓為1.2V，總功率消耗則為28.5μW。

關鍵字

高通三角積分調變器 ； 前置放大器 ； 類比前端 ； 截波穩定技術

並列摘要

The ones of the top ten causes of the death in the world are including Ischaemic heart disease as well as Stroke and other cerebrovascular disease. However, the diagnosis of disease usually requires long time to monitor the related bio-signals, eg. EEG or ECG. A wireless biomedical signal acquisition systems with low power consumption and high resolution is necessary for monitoring effectively and carrying conveniently.
In this thesis, an analog front end circuit for wireless biomedical signal acquisition systems is implemented. Different from the tradition acquisition systems, the proposed analog front end circuit with a signal bandwidth of 200 Hz, Effective number of bits ( ENOB) of 12 bits is simpler to save on the power consumption.
The circuits with chopper stabilization preamplifier and high-pass sigma-delta modulator are implemented in TSMC 0.18μm 1P6M CMOS process. The measured results reveal the SFDR is 72dB.The total power consumption is 28.5μW under the supply voltage of 1.2V.

並列關鍵字

high-pass sigma-delta modulator ； preamplifier ； Analog front-end ； chopper stabilization

參考文獻

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