Bio-impedance analysis for high-speed and wide-band application by using pulse stimulation

Conventional bio-impedance analysis to estimate the body composition has been used for many bio applications. It has been commonly applied by a sinusoidal wave or wide-band frequency signal in current domain on the target tissue, and its measured response is processed for providing the impedances. These techniques, however, have common trade-off between detectable frequency range and data rate. For some applications both wide-band frequency detection and high-speed update rate are required. This paper presents a pulse stimulation technique for the bio-impedance analysis, which is proper to the high-speed and wide-band applications. The proposed method is proved by theoretical analysis. It is also verified with the simulation and measurement results.