2016
DOI: 10.1007/978-981-287-928-8_13
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Analog Front-End for the Integrated Circuit AD5933 Used in Electrical Bioimpedance Measurements

Abstract: -In the recent decades the bioimpedance has been used in many areas of medicine. The technological advance of electronics has enabled the increase of bioimpedance applications. Measuring biological tissues is a hard work, which leads to the need of continuous research based on better methods and equipments for diagnosis. Many electronics manufacturers have helped the biomedical area through the development of new electronic components and equipment. The objective of this work is to adapt the impedance meter AD… Show more

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Cited by 13 publications
(7 citation statements)
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“…While these accuracies are superior and are appropriate for their intended application, the reported impedance range is much smaller and the device utilized dual supply op-amps which is unfavorable for portability. Noveletto et al compared two current source configurations which resulted in impedance and phase errors of less than 3% and 6%, respectively, when measuring impedances between 150 Ω and 1.2 kΩ via a mirrored Howland-modified current source-based AFE [10]. This configuration provides slightly superior circuit performance over a smaller impedance range and is a reasonable alternative for portable bioimpedance if more than 5 V supplies are appropriate for a particular application.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…While these accuracies are superior and are appropriate for their intended application, the reported impedance range is much smaller and the device utilized dual supply op-amps which is unfavorable for portability. Noveletto et al compared two current source configurations which resulted in impedance and phase errors of less than 3% and 6%, respectively, when measuring impedances between 150 Ω and 1.2 kΩ via a mirrored Howland-modified current source-based AFE [10]. This configuration provides slightly superior circuit performance over a smaller impedance range and is a reasonable alternative for portable bioimpedance if more than 5 V supplies are appropriate for a particular application.…”
Section: Discussionmentioning
confidence: 99%
“…While bioimpedance is an attractive method for continuously assessing tissue properties, commercial impedance analyzers are expensive and too large for remote monitoring or large scale clinical deployment. Many researchers have turned to cheaper alternatives such as designing analog front ends (AFE) for the AD5933, an impedance analyzer on an integrated circuit (IC) from Analog Devices [10][11][12][13][14][15]. Many of these circuits change the output of the AD5933 IC into a constant current source and measure tissue impedance using a four-electrode configuration with two current sourcing electrodes and two voltage sensing electrodes.…”
Section: Introductionmentioning
confidence: 99%
“…Upper arms electrical impedance spectroscopy (EIS) was assessed by means of an homemade portable device which implemented the electronic board AD5933 from Analog Devices Inc., USA [7] by using the electrodes bipolar configuration; it was powered by a USB gate of a laptop which, in turn, was not connected to the fixed electricity network. The device injected an electrical current with a frequency sweep from 1 kHz to 300 kHz at a constant tension of 1.0 Vpp, so the maximum output current is 0.25 mA (typical Short-Circuit Current to Ground at VOUT) [7]. As shows figure 1, disposable ECG electrodes were used to inject/detect the EIS signals in the forearms.…”
Section: B Instrumentation and Experimental Protocolmentioning
confidence: 99%
“…In terms of developed technologies, most of those systems aim to support the physical rehabilitation through some virtual rehabilitation applications, which are based on serious games (exergames). Like in other countries in Latin America, those systems propose to use different low-cost devices such as Kinect® [59], [61], [62], Nintendo Wii® [24], [28], balance board [64] and PlayStation EYE® webcam [63], among others. Those initiatives allowed to provide therapeutic treatments for hemiparetic stroke [24], [28], [63], [64] and upper limb disabilities [61], [62].…”
Section: Brazilmentioning
confidence: 99%
“…Additionally, a novel stabilometry system based on serious games was proposed. It uses a balance board with an inertial sensor unit (accelerometer and gyroscope sensor) for training and evaluating the balance of hemiparetic stroke patients [64]. This work shows a low-cost rehabilitation initiative that employs simple hardware according to specific requirements.…”
Section: Mover-t [89]mentioning
confidence: 99%