臺灣博碩士論文加值系統

本論文提出一高解析度之溫度感測器，藉由兩組不同的電壓，分別偏壓於與溫度無關之臨界點以上或以下時，可有效補償因溫度造成之電子遷移率及臨界電壓之非線性影響，使得輸出能產生一高線性度、高驅動能力之電流式溫度感測器。此外，利用窗形比較器將電流轉成頻率寬度，並透過一差動校正技術將比較器傳遞延遲時間造成之輸出誤差作補償，使得溫度所對應之頻率寬度準確度有效的提升。最後透過一交錯式時間數位轉換器將頻率寬度轉成數位碼輸出，藉由控制兩組相同之時間數位轉換器啟動或重置，除了能準確計數大寬度之脈波外，還能切割細微的變化量，並減少其量測上之成本。根據模擬結果，在溫度範圍-55℃~125℃中，可取出的溫度解析度為0.1℃，其最大誤差之範圍介於±0.4℃。

This work presents a current mode linear temperature sensor through summing two temperature-dependent current sources driven in particular region with complementary temperature dependency. The nonlinear effects induced by carrier mobility and threshold voltage are therefore cancelled, indeed, not only improves linearity but also enhances driving capability. In addition, a window comparator is adopted to convert current quantity into representation of pulse width. To increase the conversion accuracy, we develop a differential calibration to reduce the unideal effect of comparator. The interlaced time-digital-converter which consists of two sub-converters with coarse and fine scale respectively is then used to quantify the converted representation of pulse width. By controlling sub-converters on and off alternately, the wide pulse width can be calculated effectively and the narrow pulse width can be precisely acquired as well. Under the temperature range from -55℃ to 125 ℃, the temperature resolution is 0.1℃ and the maximum error is within ± 0.4℃.

中文摘要 …………………………………………………………… i
英文摘要 …………………………………………………………… ii
誌謝 …………………………………………………………… iii
目錄 …………………………………………………………… iv

圖目錄 …………………………………………………………… v

表目錄 …………………………………………………………… vii
第一章 緒論…………………………………………………………… 1
1.1 研究背景……………………………………………………… 1
1.2 研究動機……………………………………………………… 2
1.3 相關研究……………………………………………………… 3
1.4 論文架構……………………………………………………… 6
第二章 溫度感測器之基本介紹……………………………………… 7
2.1 電壓式溫度感測器…………………………………………… 7
2.2 電流式溫度感測器…………………………………………… 8
2.3 設計溫度感測器之具備條件………………………………… 10
第三章 高解析度之溫度感測器架構說明…………………………… 11
3.1 電流式溫度感測器之實現方式……………………………… 11
3.2 窗型比較器及差動校正技術………………………………… 13
3.3 交換式時間數位轉換器之實現方式………………………… 20
3.4 數位碼與溫度之關係式……………………………………… 27
第四章 模擬結果與比較……………………………………………… 29
第五章 結論…………………………………………………………… 38
參考文獻 ………………………………………………………………… 40

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