Bio-Medical CMOS ICs by Hoi-Jun Yoo, Chris van Hoof PDF

By Hoi-Jun Yoo, Chris van Hoof

ISBN-10: 1441965963

ISBN-13: 9781441965967

ISBN-10: 1441965971

ISBN-13: 9781441965974

Bio-Medical CMOS ICs offers readers with the elemental operation ideas and architectures in addition to the newest study result of low energy CMOS ICs in particular for bio-medical purposes. The publication covers 3 elements:  very important sign Sensing and Processing from Neuronal sign, Electrode and Readout IC, ADC to Bio-Signal Processor  brief Distance Bio-Medical physique Channel communique and instant conversation  Examples of Attachable, Wearable and Implantable Bio-Medical IC and Its purposes Novel sensing, processing and verbal exchange equipment also are brought and analyzed, in addition to the fundamentals of making plans and designing healthcare structures that might shift healthcare paradigm from “reactive” affliction administration to “proactive and preemptive” health and wellbeing administration. Bio-Medical CMOS ICs is an invaluable ebook for engineers, researchers and scholars within the box of CMOS technology.

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Extra resources for Bio-Medical CMOS ICs

Example text

Mannheimer and Lampe (1987) pointed out that the only tangible disadvantage with having a large electrode interface impedance is that more power will be required from the stimulator to drive the stimulating current through the electrodes into the patient. Graphite-loaded polyesters and similar materials are used in external pacing electrodes, for example. Some are constructed using tin as the metal layer. In early electrodes the combination of tin and the chloride based-gel gave rise to pitting of the metal.

4) and are the lowest ones on the electromotive series. As “noble” metal electrodes do not tend 3 Biomedical Electrodes For Biopotential Monitoring and Electrostimulation 53 to react chemically with the electrolyte, the Nernst equation is not defined and the measured potential is often influenced more by any traces of impurities on the surface than by the intrinsic properties of the metal itself. The electrode potential can drift randomly, especially immediately following implantation. It may fluctuate widely under apparently identical circumstances.

In this case, current would pass freely across the interface unimpeded. Measured biosignals, for example, would be unattenuated and undistorted. A perfect electrode system! The electrode potential would always remain constant at its reversible value. A perfectly “polarizable” electrode would not permit the flow of any dc or faradaic current as the charge transfer resistance in this case is infinite. Such an electrode is sometimes termed a “blocking” electrode. No faradaic charge would cross the interface, even for large overpotentials, and the electrode couples capacitatively with the tissues/electrolyte in this extreme case.

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Bio-Medical CMOS ICs by Hoi-Jun Yoo, Chris van Hoof

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