https://scholars.lib.ntu.edu.tw/handle/123456789/428183
標題: | A CMOS Thermistor- Embedded Continuous-Time Delta-Sigma Temperature Sensor With a Resolution FoM of 0.65 pJ°C2 | 作者: | C.-H. Weng C.-K. Wu T.-H. Lin TSUNG-HSIEN LIN 林宗賢 |
關鍵字: | Modulation; Resistance; Resistors; Switches; Temperature sensors; Thermistors | 公開日期: | 2015 | 卷: | 50 | 期: | 11 | 起(迄)頁: | 18860-18871 | 來源出版物: | IEEE Journal of Solid-State Circuits | 摘要: | In a smart temperature sensor system, two individual building blocks, a sensing front-end and an analog-to-digital converter, are cascaded to implement the temperature-to-digital conversion. In this work, a thermistor-embedded continuous-time delta-sigma modulator (CTDSM), which merges these two building blocks into one, is proposed for a hardware- and energy-efficient temperature acquisition. The thermistor-based sensing front-end is reused in a 2nd-order 1 bit CTDSM to attain a high-resolution, low hardware complexity, and energy-efficient temperature sensing. Furthermore, a resistor-ladder with a switch on-resistance compensation scheme is proposed to implement the trimming circuit. Over a range of -45 °C ∼ 125°C, the proposed smart temperature sensor consumes 64.5μW from 1.5 V supply voltage and achieves a resolution around 0.01 °C rms (1σ) temperature resolution with a single conversion time of 100 μs. The corresponding resolution FoM is 0.65 pJ °C2. With 1-point trimming, this design achieves ±1°C temperature inaccuracy; this inaccuracy can be further improved to ±0.4°C with additional batch calibration. © 1966-2012 IEEE. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/428183 | ISSN: | 189200 | DOI: | 10.1109/jssc.2015.2470517 | SDG/關鍵字: | Analog to digital conversion; Continuous time systems; Delta sigma modulation; Energy efficiency; Hardware; Modulators; Semiconductor junctions; Thermistors; Trimming; Analog to digital converters; Compensation scheme; Delta sigma modulator; Digital conversion; Hardware complexity; Smart temperature sensors; Temperature resolution; Temperature sensing; Temperature sensors |
顯示於: | 電子工程學研究所 |
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