Multi frequency Electrical Bio-impedance has been widely used as noninvasive technique for characterizing tissue. Most systems use wide band current sources for injecting current and instrumentation amplifiers for measuring resultant potential difference. Tissue electrical properties exhibit frequency characteristics over a broad bandwidth (typically 100Hz to 100MHz).Such applications require wide band accurate ac current drivers with low distortion and high output impedance. An integrated current driver is presented that fulfils the requirement of maximum output current of 888μAp-p, and at 100MHz the measured total harmonic distortion is below 0.01%.For accurate setting of output current amplitude into load current driver uses negative feedback. Active electrodes applications makes use of current driver circuit.
S. MD. Imran Ali, Syed Noorullah, P. Anusha, U Gayathri
Active electrodes, Bio-impedance, current driver, low distortion, Tissue impedance
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Cite This Article
S. MD. Imran Ali, Syed Noorullah, P. Anusha, U Gayathri, "Implementation of Broad band and Zero Distortion CMOS Current Driver Circuit For Bio-medical Applications", International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 2, Issue 2, pp.278-282, March-April-2016.
URL : http://ijsrset.com/IJSRSET162287.php