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- W3110280527 abstract "AbstractMeasurement of a voltage response caused by a current excitation signal sent to a biological system under study, i.e. measurement of electrical bioimpedance, is typically using analog or digital lock-in detection. Such a detector consists multiplying unit together with following low pass filter. Result of such a multiplication is typically acquired in-phase with excitation signal, and in quadrature with it. Later the actual bioimpedance vector can be calculated with its magnitude and phase. It can be viewed as performing correlation between excitation and response signals in two positions: with zero shift and 90° shift. It requires two identical channels, the exact identity of which is hard to achieve. Method for automatic single-channel detection is proposed, analyzed and tested in the lab for the acquisition of the electrical bioimpedance signal at the radial artery. The proposed method is useful when wearable low power acquisition of the electrical bioimpedance is required. It simplifies circuitry significantly, by thereby increasing reliability and lowering power consumption.KeywordsLock-in detectionElectrical bioimpedanceCorrelation in analog domain" @default.
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- W3110280527 date "2020-11-30" @default.
- W3110280527 modified "2023-09-26" @default.
- W3110280527 title "Automatic Detection of Real and Imaginary Parts of Electrical Impedance with Single Synchronous Demodulation Channel" @default.
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- W3110280527 doi "https://doi.org/10.1007/978-3-030-64610-3_18" @default.
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