Results 261 to 270 of about 26,642 (298)
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Contamination insensitive differential capacitive pressure sensors
Proceedings IEEE Thirteenth Annual International Conference on Micro Electro Mechanical Systems (Cat. No.00CH36308), 2000In this paper, a contamination-insensitive differential capacitive pressure sensor with a sealed gap is presented. This device is made of three polysilicon layers including a stationary middle plate and the top and bottom plates that are rigidly coupled together by a series of posts hence deflecting in tandem by a change in differential or gauge ...
null Chuan Che Wang +3 more
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Negative differential capacitance in n-GaN/p-Si heterojunctions [PDF]
Solid State Communications, 2011 Negative differential capacitance (NDC) has been observed in n-GaN/p-Si heterojunctions grown by plasma assisted molecular beam epitaxy (PAMBE). The NDC is observed at low frequencies 1 and 10 kilohertz (kHz) and disappeared at a higher testing frequency
Mahesh Kumar +2 more
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Acceleration sensor with differential capacitance
The Journal of the Acoustical Society of America, 1992In an acceleration sensor, in particular for automobiles, at least two electrodes which are surrounded by a dielectric are arranged, substantially parallel to each other, in a housing and immersed over part of their length in an electrically conductive liquid. Flip-flops output pulses having durations based on capacitance of the sensor.
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Digital Converter for Differential Capacitive Sensors
2006 IEEE Instrumentation and Measurement Technology Conference Proceedings, 2006A capacitance to digital converter that directly translates the changes in a differential type capacitive sensor to a proportional digital value is described in this work. The proposed method employs a suitably modified, dual-slope, analog to digital conversion technique.
N. Madhu Mohan +2 more
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A switched-capacitor differential-capacitance-to-time converter for capacitive sensors
2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS), 2011A high-accuracy and low-power consumption switched-capacitor (SC) differential-capacitance-to-time converter (DCTC) is presented for high-accuracy ratiometric operation of capacitive sensors. This circuit does not require additional capacitors and component matching.
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A differential capacitive mini-displacement sensor
Proceedings of IEEE Sensors, 2004., 2006The paper describes a micromachined device that offers high sensitivity and wide dynamic range for electronically monitoring the planar displacement caused by other microstructures. The device uses a differential capacitance between overlapped electrodes to sense displacement.
null Zutao Liu +2 more
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Further aspects of the differential capacitance of iron
Electrochimica Acta, 1971Abstract The differential capacitance of high purity zone-refined iron was measured using a single pulse technique. Capacitance behaviour in dilute solutions of sodium perchlorate showed that an unambiguous assignment of a value to the pzc is not possible from the capacitance minima. Measurements in sodium halides showed a different behaviour with I−
H. Vaidyanathan, N. Hackerman
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Offset compensation for differential charge‐based capacitance measurement
International Journal of Circuit Theory and ApplicationsSummaryThis paper presents a fully integrated differential charge‐based capacitance measurement (CBCM) circuit designed to detect attoFarads capacitive variations to find airborne particulate matter (PM). This paper presents a novel method for compensating the output offset of the CBCM electronic front‐end in the range of 3.1–3.4 V through the trimming
Nicolò Cascone +4 more
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Capacitive Silicon Differential Pressure Sensor
Proceedings of the International Solid-State Sensors and Actuators Conference - TRANSDUCERS '95, 2005A capacitive differential pressure sensor based on silicon bulk micromachining is presented. This sensor, which is part of a flow metering system, transforms the differential pressure delivered by a fluidic oscillator into capacitance variations. These variations are then converted by an ASIC into a digital output signal.
J. Hermann +3 more
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Measurement Science and Technology, 1997
This paper focuses on the development of new sensor electronics for electrical capacitance tomography to increase the measurement accuracy and, accordingly, to enhance the system performance in terms of image resolution, and the data acquisition speed. The new system relies on the use of the unknown capacitance in an active differentiator.
F T Kühn, P A van Halderen
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This paper focuses on the development of new sensor electronics for electrical capacitance tomography to increase the measurement accuracy and, accordingly, to enhance the system performance in terms of image resolution, and the data acquisition speed. The new system relies on the use of the unknown capacitance in an active differentiator.
F T Kühn, P A van Halderen
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