Smart Temperature Sensor with Low Supply Voltage Sensitivity and High Accuracy
| Autor: | You-Jyun Peng, 彭友均 |
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| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 The performance upgrade of chips is usually accompanied by the increment power consumption. Along with the pursuing of high integration density and small chip size, thermal management becomes an inevitable trend for chip design nowadays. Without proper supervision, the heat built up by power consumption may seriously damage the device robustness or even burn out the chip. To reduce the risk of overheating, VLSI chips gradually integrate temperature sensors for thermal monitoring to enhance their reliability and life time. A smart temperature sensor featuring small die size, low power, low supply voltage sensitivity but high accuracy is proposed in this thesis. Since all signals are processed in time-domain, no subtle analog-to-digital converter or operational amplifier is used. The chip size and power consumption can be substantially reduced. A bandgap reference is utilized to stabilize the operation of sensitive analog circuits against supply voltage variation and a variable gain time amplifier is adopted to support one-point calibration for the cost down of mass production. The chip was fabricated in a TSMC 0.18 µm 1P6M 1.8 V/3.3V standard CMOS process. The chip size is merely 0.082 mm2. The resolution, measurement range and power consumption are 0.05°C, -40~120°C and 4.3 µW, respectively. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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