BME 552 HW1 2009

BME 552 HW1 2009 - BME 552 Homework Set 1 Assigned Jan 23...

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BME 552 Homework Set 1 Assigned Jan. 23, 2009 Due Jan. 30, 2009 1. Build a mathematical model of the electrode using the three element model shown in class. Plot impedance as a function of frequency between 1Hz and 100kHz. Assume linear behavior. Initial conditions: tissue resistivity 150 Ohm-cm, electrode radius 100 microns. Assume R elec (parallel resistance) is 10 MOhm. a. Plot impedance modulus and phase for initial conditions b. Change electrode radius to 50 microns, 200, 500 microns. Plot c. Consider roughness factor of electrode of 1.25, 1.5, and 2.0. Plot d. Change tissue conductivity to 100, 200 Ohm-cm. Plot e. Briefly explain the changes that you see in the plots. 2. An engineer shows you data of an electrode that has been tested for several weeks
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BME 552 HW1 2009 - BME 552 Homework Set 1 Assigned Jan 23...

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