Variable input range continuous-time switched current δΣ analog digital converter for RFID CMOS biosensor applications

被引：0

作者：

Kim, Boram ^{[1
]}

Uno, Shigeyasu ^{[1
]}

Nakazato, Kazuo ^{[1
]}

机构：

[1] Department of Electrical Engineering and Computer Science, Nagoya University, 464-8603, Japan

来源：

World Academy of Science, Engineering and Technology | 2011年 / 75卷

关键词：

Radio frequency identification (RFID) - Analog to digital conversion - Digital radio - MOS devices - CMOS integrated circuits - Continuous time systems - Metals - Frequency converters - Oxide semiconductors;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Continuous-time delta-sigma (ΔΣ) analog digital converter (ADC) for radio frequency identification (RFID) complementary metal oxide semiconductor (CMOS) biosensor has been reported. This ΔΣ ADC is suitable for digital conversion of biosensor signal because of small process variation, and variable input range. As the input range of continuous-time switched current ΔΣ ADC (Dynamic range: 50 dB [1], [2] can be limited by using current reference, amplification of biosensor signal is unnecessary. The input range is switched to wide input range mode or narrow input range mode by command of current reference. When the narrow input range mode, the input range becomes ± 0.8 V. The measured power consumption is 5 mW and chip area is 0.31 mm2 using 1.2 μm standard CMOS process. Additionally, automatic input range detecting system is proposed because of RFID biosensor applications.

引用

页码：242 / 246

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