| 弛张振荡器在高精度体温计芯片中的应用 |
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| 引用本文： | 邹志革,邹雪城,简文翔.弛张振荡器在高精度体温计芯片中的应用[J].固体电子学研究与进展,2008,28(3). |
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| 作者姓名： | 邹志革 邹雪城 简文翔 |
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| 作者单位： | 华中科技大学电子科学与技术系,武汉,430074 |
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| 摘 要： | 设计了一款基于弛张振荡器的温度测量电路,通过参考/感应振荡器电路,将热敏电阻的阻值变化转变成数字化的频率信号送系统处理。弛张振荡器使用了具有施密特触发器相同功能的RS触发器,降低了芯片对工艺的要求,便于在低电压和宽温度范围正常工作。该温度测量电路被成功地应用于一款便携式电子体温计芯片,芯片采用0.5μm 1.5 V DMSP CMOS工艺,面积为1 250μm×1 260μm,在1.1 V的低电压下测量精度高达0.05°C,工作电流为30μA,待机电流为0.2μA。
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| 关 键 词： | 温度测量 弛张振荡器 RS触发器 施密特触发器 体温计 |
Relaxation Oscillator Application for the High Accuracy Clinical Thermometer Chip |
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| ZOU Zhige,ZOU Xuecheng,JIAN Wenxiang.Relaxation Oscillator Application for the High Accuracy Clinical Thermometer Chip[J].Research & Progress of Solid State Electronics,2008,28(3). |
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| Authors: | ZOU Zhige ZOU Xuecheng JIAN Wenxiang |
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| Affiliation: | ZOU Zhige ZOU Xuecheng JIAN Wenxiang(Department of Electronic Science , Technology,Huazhong University of Science , Technology,Wuhan,430074,CHN) |
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| Abstract: | A relaxation oscillator based temperature measurement circuit has been presented in this paper.The reference/sensor frequency generation circuit is used to convert the change of thermistor sensor into frequency signal for digital processing.A RS trigger is designed which has the same function as Schmitt trigger for the relaxation oscillator.The advantage is that RS trigger reduces the dependence to the process and has better performance under low voltage and wide temperature range.This temperature measureme... |
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| Keywords: | temperature measurement relaxation oscillator RS trigger Schmitt trigger clinical thermometer |
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