| 应用于人工关节无线监控系统的低功耗循环式ADC设计 |
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| 引用本文： | 陈怡,李福乐,陈虹,张春,王志华.应用于人工关节无线监控系统的低功耗循环式ADC设计[J].半导体学报,2009,30(8):085009-6. |
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| 作者姓名： | 陈怡 李福乐 陈虹 张春 王志华 |
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| 作者单位： | Tsinghua;National;Laboratory;Information;Science;Technology;Institute;Microelectronics;University; |
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| 基金项目： | 国家自然科学基金60475018 |
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| 摘 要： | This paper presents a low power cyclic analog-to-digital convertor （ADC） design for a wireless monitoring system for orthopedic implants. A two-stage cyclic structure including a single to differential converter, two multiplying DAC functional blocks （MDACs） and some comparators is adopted, which brings moderate speed and moderate resolution with low power consumption. The MDAC is implemented with the common switched capacitor method. The 1.5-bit stage greatly simplifies the design of the comparator. The operational amplifier is carefully op- timized both in schematic and layout for low power and offset. The prototype chip has been fabricated in a United Microelectronics Corporation （UMC） 0.18-μm 1P6M CMOS process. The core of the ADC occupies only 0.12 mm2. With a 304.7-Hz input and 4-kHz sampling rate, the measured peak SNDR and SFDR are 47.1 dB and 57.8 dBc respectively and its DNL and INL are 0.27 LSB and 0.3 LSB, respectively. The power consumption of the ADC is only 12.5 μW in normal working mode and less than 150 nW in sleep mode.
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| 关 键 词： | 低功耗设计 无线监控系统 ADC 植入物 骨科 模拟数字转换器 运算放大器 行政管理制度 |
| 修稿时间： | 4/1/2009 2:32:41 PM |
A low power cyclic ADC design for a wireless monitoring system for orthopedic implants |
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| Chen Yi,Li Fule,Chen Hong,Zhang Chun and Wang Zhihua.A low power cyclic ADC design for a wireless monitoring system for orthopedic implants[J].Chinese Journal of Semiconductors,2009,30(8):085009-6. |
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| Authors: | Chen Yi Li Fule Chen Hong Zhang Chun and Wang Zhihua |
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| Affiliation: | Tsinghua National Laboratory for Information Science and Technology, Institute of Microelectronics, Tsinghua University, Beijing 100084, China;Tsinghua National Laboratory for Information Science and Technology, Institute of Microelectronics, Tsinghua University, Beijing 100084, China;Tsinghua National Laboratory for Information Science and Technology, Institute of Microelectronics, Tsinghua University, Beijing 100084, China;Tsinghua National Laboratory for Information Science and Technology, Institute of Microelectronics, Tsinghua University, Beijing 100084, China;Tsinghua National Laboratory for Information Science and Technology, Institute of Microelectronics, Tsinghua University, Beijing 100084, China |
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| Abstract: | This paper presents a low power cyclic analog-to-digital convertor (ADC) design for a wireless monitoring system for orthopedic implants. A two-stage cyclic structure including a single to differential converter, two multiplying DAC functional blocks (MDA |
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| Keywords: | monitoring system low power consumption small size Analog to Digital convertor single to differential convertor |
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