用於晶片溫度監控之寬操作電壓微型溫度感測器

Wide Voltage Range Compact Temperature Sensor for On-Chip Thermal Monitoring

顧家源(Chia-Yuan Ku)

指導教授 ： 劉宗德

國立臺灣大學/電機資訊學院/電子工程學研究所/碩士(2017年)

https://doi.org/10.6342/NTU201704058

摘要

本論文提出了一個全CMOS組成可調電壓的低功耗溫度感測器，所提出的架構只用一個操作在次臨界區的環形振盪器來感測溫度，因此面積和功耗都比以往的研究要小。感測器的操作電壓範圍從0.6到1.2伏特，因此可和數位電路共用電源而不需要額外的電壓調節器。此外，因為感測器使用面積很小，所以在和數位電路進行標準元件庫設計流程的時候，對時序限制所造成的影響會比一般用ADC做的感測器要小。感測器用0.18μm CMOS製程製作，所佔的面積為0.06 mm^2，室溫下所消耗的功率為55 nW。而在兩點校正之下，準確度能到+0.34°C/-1.97°C。在操作電壓從0.6到1.2伏特，在不重新校正的情況下，誤差可以到+2.23°C/-1.53°C。本論文所提出的感測器架構適合用在IoT系統或有限能源的裝置。

關鍵字

溫度感測器 ； 低功率 ； 漏電流 ； 寬操作電壓

並列摘要

This thesis presents an all CMOS, low power and voltage scalable temperature sensor. The proposed temperature sensor based on only a ring oscillator which operates in subthreshold region to sense temperature, resulting in a smaller area and lower power consumption than previous studies. The sensor can be operated with supply voltage from 0.6 to 1.2 V, so it can share the power grid with digital circuit without additional regulator. Also, since the sensor is compact, placing a sensor inside digital circuits to run the standard cell design flow will have smaller impact on timing constraint compared to conventional ADC-based sensors. The sensor is implemented in 0.18μm CMOS process and occupies 0.06 mm^2 while consuming 55 nW at room temperature. Accuracy of +0.34°C/-1.97°C is achieved after 2-point calibration. Error of +2.23°C/-1.53°C with no recalibration is achieved under supply voltage from 0.6 to 1.2 V. The proposed sensor is suitable for IoT systems or energy-constrained devices.

並列關鍵字

Temperature sensor ； Low power ； Leakage current ； Wide voltage range

參考文獻

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