A relaxation-oscillator-based interface for high-accuracy ratiometric signal processing of differential-capacitance transducers

被引：40

作者：

Mochizuki, K ^{[1
]}

Watanabe, K

Masuda, T

Katsura, M

机构：

[1] Numazu Coll Technol, Numazu 410, Japan

[2] Shizuoka Univ, Elect Res Inst, Hamamatsu, Shizuoka 432, Japan

[3] Yamatake Honeywell Co Ltd, Dept Engn, Fujisawa, Kanagawa 251, Japan

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1998年 / 47卷 / 01期

关键词：

analog circuit; capacitive transducer; intelligent transducer; pressure measurement; relaxation oscillator; signal processing;

D O I：

10.1109/19.728780

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

For high-accuracy signal processing of differential-capacitance transducers, an interface circuitry is developed based on a relaxation oscillator, Two capacitors of the transducer are multiplexed by diode switches to form the op-amp-based integrator. The duty ratio of the oscillator output then measures the ratio of two capacitances. A circuit analysis shows that the interface can detect the capacitance change as small as 0.01% of the total capacitance, Experimental results are also given to confirm the analysis.

引用

页码：11 / 15

页数：5

共 9 条

[1] A relaxation-oscillator-based interface for high-accuracy ratiometric signal processing of differential-capacitance transducers
Mochizuki, K
Watanabe, K
Masuda, T
Katsura, M
IMTC/97 - IEEE INSTRUMENTATION & MEASUREMENT TECHNOLOGY CONFERENCE: SENSING, PROCESSING, NETWORKING, PROCEEDINGS VOLS 1 AND 2, 1997, : 1164 - 1168
[2] An interface circuit for high-accuracy signal processing of differential-capacitance transducers
Mochizuki, K
Masuda, T
Watanabe, K
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 1998, 47 (04) : 823 - 827
[3] An interface circuit for high-accuracy signal processing of differential-capacitance transducers
Mochizuki, K
Masuda, T
Watanabe, K
JOINT CONFERENCE - 1996: IEEE INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE & IMEKO TECHNICAL COMMITTEE 7, CONFERENCE PROCEEDINGS, VOLS I AND II: QUALITY MEASUREMENTS: THE INDISPENSABLE BRIDGE BETWEEN THEORY AND REALITY (NO MEASUREMENTS? NO SCIENCE!), 1996, : 1200 - 1204
[4] A high-accuracy high-speed signal processing circuit of differential-capacitance transducers
Mochizuki, K
Watanabe, K
Masuda, T
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 1998, 47 (05) : 1244 - 1247
[5] A high-accuracy, high-speed signal processing circuit of differential-capacitance transducers
Mochizuki, K
Watanabe, K
Masuda, T
WHERE INSTRUMENTATION IS GOING - CONFERENCE PROCEEDINGS, VOLS 1 AND 2, 1998, : 134 - 137
[6] A switched-capacitor interface for high-accuracy, high-speed ratiometric signal processing of differential capacitance transducers
Ogawa, S
Watanabe, K
IMTC/2001: PROCEEDINGS OF THE 18TH IEEE INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE, VOLS 1-3: REDISCOVERING MEASUREMENT IN THE AGE OF INFORMATICS, 2001, : 1302 - 1307
[7] A high-accuracy interface circuit for differential capacitance transducers
Mochizuki, K
Oisugi, Y
Watanabe, K
ICEMI'99: FOURTH INTERNATIONAL CONFERENCE ON ELECTRONIC MEASUREMENT & INSTRUMENTS, VOLS 1 AND 2, CONFERENCE PROCEEDINGS, 1999, : 441 - 446
[8] A high-accuracy, high-speed interface circuit for differential-capacitance transducer
Hu, HL
Xu, TM
Hui, SE
SENSORS AND ACTUATORS A-PHYSICAL, 2006, 125 (02) : 329 - 334
[9] A High-Accuracy, Low-Power Consumption Switched-Capacitor Interface of Differential Capacitance Transducers
Ogawa, Satomi
53RD IEEE INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, 2010, : 684 - 687

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