Results 251 to 260 of about 54,628 (307)
Charge-based capacitance measurement for bias-dependent capacitance
IEEE Electron Device Letters, 2006 In this letter, charge-based capacitance measurement (CBCM) is applied to characterize bias-dependent capacitances in a CMOS transistor. Due to its special advantage of being free from the errors induced by charge injection, the operation of charge-injection-induced-error-free CBCM allows for the extraction of full-range gate capacitance from the ...
Yao-Wen Chang +2 more
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On-line biomass monitoring by capacitance measurement
Journal of Biotechnology, 1992An in-situ, steam-sterilizable capacitance probe was used to follow the biomass concentration on-line, in bioreactors from 20 to 2000 l total volume. Microbial cultures of Saccharomyces cerevisiae, Pichia pastoris and Streptomyces virginiae were grown in batch and fed-batch culture in both defined and complex media in order to demonstrate the wide ...
R, Fehrenbach +2 more
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A High-Speed Digital Electrical Capacitance Tomography System Combining Digital Recursive Demodulation and Parallel Capacitance Measurement [PDF]
IEEE Sensors Journal, 2017 Two means can be used to improve the data acquisition rate of the electrical capacitance tomography (ECT) system with a fixed excitation frequency, i.e., improving the capacitance measurement speed or changing the capacitance measurement mode from serial
, Zhang Cao, Ang Huang
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Triboelectricity in Capacitive Biopotential Measurements
IEEE Transactions on Biomedical Engineering, 2011Capacitive biopotential measurements suffer from strong motion artifacts, which may result in long time periods during which a reliable measurement is not possible. This study examines contact electrification and triboelectricity as possible reasons for these artifacts and discusses local triboelectric effects on the electrode-body interface as well as
Tobias Wartzek +4 more
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Measurement of the quantum capacitance of graphene
Nature Nanotechnology, 2009Graphene has received widespread attention due to its unique electronic properties. Much of the research conducted so far has focused on electron mobility, which is determined by scattering from charged impurities and other inhomogeneities. However, another important quantity, the quantum capacitance, has been largely overlooked.
Jilin, Xia +3 more
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Capacitance-to-voltage converter for capacitance measuring system
2011 4th International Conference on Mechatronics (ICOM), 2011The objective of this paper is to provide a lower range capacitance value in a wider range of detection to be used in high frequency system. This is achieved by designing the Op-amp using CMOS 0.13-μm technology using switched-capacitor technique. Evaluation of the circuit is based on analytical approach and the simulation is carried out using the PC ...
Nurul Arfah +2 more
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Improvement of high-value capacitance measurement
2012 Conference on Precision electromagnetic Measurements, 2012This paper describes improvement of high-value capacitance measurement method based on the sampling technology and the inductive shunt. The method can measure capacitance from 10µF to 1mF, frequency from 100 Hz to 1 kHz.
Dongxue Dai +3 more
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Advances in the measurement of capacitance
Electronics and Power, 1977Reliable and accurate measurement of capcitance has presented problems to the electronics engineer over the years.
M.S. Raven, T.G. Raven
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Capacitance measurement method
Proceedings of IEEE. AFRICON '96, 2002This paper presents an automatic measurement method based on the classic Schering bridge applying analog-to-digital (ADC) and digital-to-analog (DAC) converters, integrated circuitry and a personal computer. Two versions for the electric circuit are analysed. Theoretical models were developed in order to explain the experimental results of the circuits.
M. Fonseca da Silva, A. Cruz Serra
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