Evaluation of electrode-sample contact impedance under different curing humidity conditions during measurement of AC impedance of cement-based materials
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DOI: 10.1038/s41598-020-74925-w
Abstract: In this study, a simple method was proposed to calculate electrode-sample contact impedance in the cases of two-point and four-point measurements. The results indicated that when using the saturated calcium hydroxide solution (SCH) as conductive… read more here.
Keywords: cement based; contact impedance; point; impedance ... See more keywords
Compensation of volatile-distributed current due to variance of the unknown contact impedance in an electrical impedance tomography sensor
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DOI: 10.1088/1361-6501/aafb22
Abstract: A weighted parameter vector lbgχl/bglsubgnorml/subg based on extracellular fluid resistance in Cole impedance model is hereby proposed in order to compensate for the volatile-distributed current. The volatile-distributed current due to variance in the unknown contact… read more here.
Keywords: contact impedance; volatile distributed; unknown contact; frequency ... See more keywords
A 43.3-μW Biopotential Amplifier With Tolerance to Common-Mode Interference of 18 Vpp and T-CMRR of 105 dB in 180-nm CMOS
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Journal of Solid-State Circuits"
DOI: 10.1109/jssc.2022.3185988
Abstract: In this article, we present an electrocardiogram (ECG) amplifier that has a large total CMRR (TCMRR) regardless of contact impedance mismatch and a large tolerance to common-mode interference (CMI). To achieve these features, an adaptive… read more here.
Keywords: mode interference; tolerance common; contact impedance; common mode ... See more keywords
Optimal combination of electrodes and conductive gels for brain electrical impedance tomography
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DOI: 10.1186/s12938-018-0617-y
Abstract: BackgroundElectrical impedance tomography (EIT) is an emerging imaging technology that has been used to monitor brain injury and detect acute stroke. The time and frequency properties of electrode–skin contact impedance are important for brain EIT… read more here.
Keywords: combination; impedance tomography; contact impedance; time frequency ... See more keywords
A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure
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DOI: 10.3390/mi11010057
Abstract: Flexible electrodes are extensively used to detect signals in electrocardiography, electroencephalography, electro-ophthalmography, and electromyography, among others. These electrodes can also be used in wearable and implantable medical systems. The collected signals directly affect doctors’ diagnoses… read more here.
Keywords: low contact; impedance; contact impedance; electrode ... See more keywords