近年來，由於穿戴式裝置的興起，各式生理訊號感測器的晶片化需求大增，其中溫度為重要的人體生理訊號，因此本晶片目標為一個能即時監控溫度訊號的感測晶片。本晶片為一個只需提供單一準位電源，不須任何外部輸入訊號與時脈即能運作的電阻型溫度感測器。其運作原理為透過將不同溫度係數的電阻，連接成電橋的方式把溫度資訊轉換為電訊號，此微小的電訊號經過增益級進一步放大，最後交給連續逼近式類比數位轉換器，將其轉換為10位元的數位輸出，使其更容易與後端處理器作連結。
本溫度感測晶片包含電阻型溫度感測前端以及後端10位元連續漸近式類比數位轉換器，目標量測溫度範圍為0°C~60°C，溫度解析度為0.1°C，根據量測結果，本晶片在晶片轉換時期所需消耗電流為79.15µA，平均消耗電流為5.06µA，且其運作週期為1秒，每次運作70µs，解析度FOM為1.02 nJ°C。

The market of wearable devices grows tremendously in the past few years. These devices include powerful sensor technologies that can collect and deliver information about their surroundings. Among lots of bio-signals, temperature is one of the most important vital signals. Thus, the goal of the thesis is to design a smart temperature sensing chip to monitor temperature. Moreover, the proposed chip needs only a single power source without other input signals.
The proposed chip includes resistor-based temperature sensing bridge and a 10-bit SAR ADC. The target sensing temperature range is 0 degree Celsius to 60 degrees Celsius with 0.1°C resolution. According to the measured results, the proposed chip draws 79μA from a 1.8V supply during sensing and conversion. In this design, the proposed chip senses temperature every second (i.e 1 Hz), and the total operating time for each temperature-sensing is 72μs. The resolution FOM of this work is 1.02nJ°C.

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