Design of Multi-Sensor Readout Circuit by Using CMOS MEMS Process
博士 === 國立成功大學 === 電機工程學系 === 103 === This dissertation presents the design of low-power low-noise monolithic CMOS MEMS accelerometers using area-efficient digital offset trimming techniques to compensate for process variations caused by sensor capacitance mismatches. The consistent distributions of...
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ndltd-TW-103NCKU54421192016-08-15T04:17:47Z http://ndltd.ncl.edu.tw/handle/59273957360057987911 Design of Multi-Sensor Readout Circuit by Using CMOS MEMS Process 金氧半微機電製程之多感測器讀取電路設計技術 Po-ChangWu 吳伯昌 博士 國立成功大學 電機工程學系 103 This dissertation presents the design of low-power low-noise monolithic CMOS MEMS accelerometers using area-efficient digital offset trimming techniques to compensate for process variations caused by sensor capacitance mismatches. The consistent distributions of resonant frequency and sensitivity indicates that the wafer-level 0.18-μm CMOS MEMS process is suitable for integrated inertial sensors. The simulation and measurement results for the designed and fabricated chips show good linearity and noise performance, which are comparable to those seen with commercial products. A 0.6-V monolithic CMOS MEMS accelerometer design with automatic offset trimming capability is also demonstrated in this dissertation, in order to achieve further reductions in the power consumption of the sensor readout circuits. With only 0.2-mW power consumption, the readout circuit can detect smaller than 0.01 g acceleration with the digital output provided by a low-voltage 14-bit ΣΔ ADC. Finally, a multiplexed multi-sensor generic interface circuit which can support the voltage-to-voltage, currentto-voltage, resistance-to-voltage, and capacitance-to-voltage conversion requirements of different sensors is proposed. This feature makes multi-sensor SoC possible when integrating an embedded microprocessor and memory in the CMOS MEMS process. A test chip, which includes a three-axis CMOS MEMS accelerometer, the generic interface circuit, an incremental ΣΔ ADC, and an ARM M0 microprocessor, was fabricated. When combined with a three-axis magnetic sensor which needs some post processing after finishing all CMOS MEMS processes, this test chip can provide a low-power and low-cost three-axis virtual gyroscope with commercial applications. Bin-Da Liu 劉濱達 2015 學位論文 ; thesis 94 en_US |
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博士 === 國立成功大學 === 電機工程學系 === 103 === This dissertation presents the design of low-power low-noise monolithic CMOS MEMS accelerometers using area-efficient digital offset trimming techniques to compensate for process variations caused by sensor capacitance mismatches. The consistent distributions of resonant frequency and sensitivity indicates that the wafer-level 0.18-μm CMOS MEMS process is suitable for integrated inertial sensors. The simulation and measurement results for the designed and fabricated chips show good linearity and noise performance, which are comparable to those seen with commercial products. A 0.6-V monolithic CMOS MEMS accelerometer design with automatic offset trimming capability is also demonstrated in this dissertation, in order to achieve further reductions in the power consumption of the sensor readout circuits. With only 0.2-mW power consumption, the readout circuit can detect smaller than 0.01 g acceleration with the digital output provided by a low-voltage 14-bit ΣΔ ADC. Finally, a multiplexed multi-sensor generic interface circuit which can support the voltage-to-voltage, currentto-voltage, resistance-to-voltage, and capacitance-to-voltage conversion requirements of different sensors is proposed. This feature makes multi-sensor SoC possible when integrating an embedded microprocessor and memory in the CMOS MEMS process. A test chip, which includes a three-axis CMOS MEMS accelerometer, the generic interface circuit, an incremental ΣΔ ADC, and an ARM M0 microprocessor, was fabricated. When combined with a three-axis magnetic sensor which needs some post processing after finishing all CMOS MEMS processes, this test chip can provide a low-power and low-cost three-axis virtual gyroscope with commercial applications.
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Bin-Da Liu |
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Bin-Da Liu Po-ChangWu 吳伯昌 |
author |
Po-ChangWu 吳伯昌 |
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Po-ChangWu 吳伯昌 Design of Multi-Sensor Readout Circuit by Using CMOS MEMS Process |
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Po-ChangWu |
title |
Design of Multi-Sensor Readout Circuit by Using CMOS MEMS Process |
title_short |
Design of Multi-Sensor Readout Circuit by Using CMOS MEMS Process |
title_full |
Design of Multi-Sensor Readout Circuit by Using CMOS MEMS Process |
title_fullStr |
Design of Multi-Sensor Readout Circuit by Using CMOS MEMS Process |
title_full_unstemmed |
Design of Multi-Sensor Readout Circuit by Using CMOS MEMS Process |
title_sort |
design of multi-sensor readout circuit by using cmos mems process |
publishDate |
2015 |
url |
http://ndltd.ncl.edu.tw/handle/59273957360057987911 |
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