1. 北京理工大学 信息与电子学院,北京,100038
2. 中国科学院 机构 微电子研究所,北京,100029
3. 厦门理工学院 机构 微电子学院,福建,厦门,361024
纸质出版:2017
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马志峰, 李熙泽, 张锋, 陈铖颖. 基于植入式眼压检测应用的低功耗SAR ADC设计[J]. 微电子学与计算机, 2017, 34(11): 135-139.
MA Zhi-feng, LI Xi-ze, ZHANG Feng, et al. A Successive Approximation ADC Design for Implantable Intraocular Pressure Detection Application[J]. 2017, 34(11): 135-139.
为了确保植入式眼压传感器在体内长期保持稳定的工作状态
同时能较为精准地反映人体眼压变化
设计了一种应用于青光眼治疗的植入式眼压检测传感器的10 bit
20 kS/s低功耗逐次逼近型数字模拟转换器(SAR ADC).该电路内置的DAC使用全电容阵列设计
利用对称电容阵列结构提高缩放电容的匹配精度; 比较器采用三级预放大器加一级动态锁存器结构
并引入了失调校准功能.电路采用SMIC 0.18 m 1P6M工艺进行设计
后仿真结果表明
在20 kS/s的采样速率下
有效位数可达9.4 bit
平均功耗仅为44.7 W.
In order to ensure the long-term stable working state and detection resolution of implantable intraocular pressure sensor
a 10 bit
20 KS/s low power successive approximation analog to digital converter (SAR ADC) for implantable intraocular pressure detection sensor application is proposed in this paper. The DAC adopts a full capacitance array design. The symmetrical capacitor array structure improves the matching accuracy of the scaling capacitor; Comparator with three-stage pre-amplifier and dynamic latch structure ensures the offset calibration function. The circuit is implemented with SMIC 0.18 m CMOS technology and the post-simulation results show that the effective number of bits (ENOB) can reach 9.4 bit at 20 KS/s sampling rate
and the average power consumption is only 44.7 W.
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侯斌, 莫亭亭. 用于16 bit SAR ADC的高精度比较器的设计[J]. 微电子学与计算机, 2016, 33(7): 15-18. DOI: 15
Donida A, Di Dato G, Cunzolo P, et al. 21.7A0.036mbar circadian and cardiac intraocular pressure sensor for smart implantable lens[J]. IEEE Int. Solid-State Circuits Conf, 2015(22/26): 392-394. DOI: 392
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