Interface adaptation design for extracellular recordings from excitable tissue

Abstract

For a clear perspective and almost exhaustive regarding physiology life organism, it is important to have the best method to gather this kind of signal and to processing them correctly and do not affect information content. Thus, the method must ensure a good sensibility and a better selectivity. Along this papers it is develop an application how to get physiological signals and how can-do processing of it. On circuit design the main component will be instrumentation amplifier, which fulfill these requests. It was presented an amplifier which is fit for high quality recording of extracellular signals from muscular tissue and nerve. In particular case, it has a gain and bandwidth for a proper action potential, a common mode rejection rate, filtering and internal noise. Input impedance is high and a low consumption are the main key feature of this device. Additional, component costs are very low and have a very compact design. Because of high input impedance of amplifier, is not necessary a specified input impedance. Final experimental results show the viability of the solution chosen by design.