電子鼻對於氣體的監測與辨識能力是非常有價值的，它可以使用於非常多應用上，例如環境監測、食品加工、汙染測試與醫療診斷等。雖然人類的嗅覺能力是遠遠超過任何現有的儀器，但在許多應用過程不能由人類嗅覺進行偵測，例如偵測環境中的有毒或其他危險氣體時。並且與傳統氣相層析儀比較，電子鼻有體積小、更輕便與低成本的優點。
本研究的目的在發展適用於電子鼻晶片中與標準CMOS製程相容之積體化導電聚合物氣體感測器陣列及其適應介面電路。導電聚合物氣體感測器為聚合物和碳黑混合物，當其暴露於化學氣體中，聚合物會產生可逆性膨脹造成電阻值的變化，並且導電聚合物感測器的初始電阻值會受到溫濕度的影響，因此本論文提出一適應介面電路可消除溫濕度造成的基線信號漂移。另一方面隨著微機電製程的進步，關於導電聚合物氣體感測器的微小化已有相當多研究，但多是於實驗室自行後製程完成，並未達到與標準CMOS製程相容，故本論文提出使用標準CMOS製程製作感測器，此研究方向對於發展可攜式電子鼻系統相當重要，能將感測器與電路作整合，達到微小化、低功率、低雜訊與低成本。

Many applications use the electronic nose (Enose) system, such as environmental monitoring, food processing, pollution measurement and medical diagnosis. The ability to monitor and identify various chemical gases is also valuable. Although the sensing capabilities of our noses are well beyond that achievable by any existing instrument, many applications require non-human odor detecting ability. Compared with a traditional gas chromatograph-mass spectrometer (GC-MS), electronic nose systems have the advantage of being smaller, more portable, and cost economic.
The research focuses on an integrated conducting polymer gas sensor array and its adaptive interface circuit compatible with standard CMOS processes for an electronic nose chip. The sensors use polymer-carbon black composites, which swell reversibly and create resistance change upon exposure to chemical vapors. The initial resistances of sensors are influenced by temperature or humidity. Therefore, an adaptive interface circuit is proposed to cancel the baseline signal drift. With the progress of MEMS process, there are many researches about miniature conducting polymer gas sensors. But most of the researches could not compatible with standard CMOS processes. We proposed the conducting polymer gas sensor array that compatible with standard CMOS processes. It is very important for the portable electronic nose system. Using standard CMOS process to integrate sensors and circuits can achieve small size, low-power, low noise and low cost.

摘 要 i
ABSTRACT ii
致 謝 iii
目 錄 iv
圖目錄 vi
表目錄 ix
第1章 緒論 1
1.1研究背景與目標 2
1.2論文架構 7
第2章 文獻回顧 8
2.1電子鼻簡介 8
2.2氣體感測器種類 10
2.1.1 金氧氧化物感測器（Metal Oxide Semiconductor Sensors, MOS） 10
2.1.2 導電聚合物感測器（Conducting Polymer sensors, CPs） 11
2.1.3 金氧半場效電晶體（Metal Oxide Field Transistors, MOSFET） 12
2.1.4 石英水晶微量天平（Quartz-Crystal Microbalance, QCM） 13
2.1.5 表面聲波（Surface Acoustic Wave, SAW） 14
2.1.6 光感測器（Fluorescent Odor Sensors） 15
2.3導電聚合物感測器組成之電子鼻系統 18
2.4積體化氣體感測器 23
第3章 導電聚合物氣體感測器設計與氣體實驗 28
3.1感測器基座製作 28
3.1.1 離散型 30
3.1.2 積體化 31
3.2 感測材料 35
3.3 滴定儀器與方式 40
3.4 四頸瓶氣體感測環境 46
3.5 氣體實驗結果 47
第4章 感測器適應介面電路設計與模擬 55
4.1 文獻回顧 55
4.2 架構簡介 57
4.3 Hspice模擬結果 63
4.3.1 八位元計數器 63
4.3.2 八位元數位類比轉換器 64
4.3.3 感測器適應介面電路 65
4.4電路佈局圖 66
第5章 電路量測結果 70
5.1量測裝置與環境 71
5.2電路區塊量測結果 72
5.3功率消耗討論 76
第6章 電子鼻系統建構 80
6.1 系統簡介 80
6.2 氣體辨識 82
第7章 結論與未來展望 85
參考文獻 87

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