Title :
Design of a bioimpedance measurement system using direct carrier compensation
Author :
Annus, Paul ; Lamp, Jürgen ; Min, Mart ; Paavle, Toivo
Author_Institution :
Dept. of Electron., Tallinn Univ. of Technol., Estonia
fDate :
28 Aug.-2 Sept. 2005
Abstract :
Operation principles, modeling and practical design of a novel system for bioimpedance measurement are introduced is this paper. The system is based on direct compensation of the carrier of response signal in order to emphasize variations of it; amplitude and phase, both caused by a biomodulation in living tissue. The proposed system is qualified to demodulate the biomodulated signals with the modulation depth as low as 0.1 to 1%, considering an excitation in the frequency range from 1 kHz to 1 MHz. The multichannel measurement system is designed for monitoring and diagnosing of the cardiovascular system.
Keywords :
bioelectric potentials; biological tissues; biomedical measurement; cardiovascular system; demodulation; electric impedance measurement; medical signal processing; modulation; patient diagnosis; 1000 to 1 MHz; bioimpedance measurement system; biomodulation; cardiovascular system diagnosing; cardiovascular system monitoring; direct carrier compensation; living tissue; multichannel measurement system; response signal; Amplitude modulation; Bioimpedance; Biomedical monitoring; Current measurement; Demodulation; Medical diagnostic imaging; Phase frequency detector; Phase modulation; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on
Print_ISBN :
0-7803-9066-0
DOI :
10.1109/ECCTD.2005.1523051
