Title :
Differential mode interferences in biopotential amplifiers
Author :
Pallas-Areny, R. ; Colominas, J.
Author_Institution :
Div. de Instrum. y Bioingeniera, ETS Ing Telecom, Barcelona, Spain
Abstract :
The authors analyze an interference mode that can be responsible for the annoying 50- or 60-Hz signal pervasively present in many surface biopotential recordings. The cause is the presence of direct differential mode interferences that produce a drop in voltage across the body and are picked up by measuring electrodes. Experimental results show that either the capacitive coupling from the patient body to power lines or the magnetic induction inside the body are the origin of that interference
Keywords :
amplifiers; bioelectric potentials; electromagnetic interference; 50 Hz; 60 Hz; biopotential amplifiers; capacitive coupling; direct differential mode interferences; interference mode; magnetic induction; power lines; surface biopotential recordings; Couplings; Differential amplifiers; Electrodes; Impedance; Interference; Magnetic field measurement; Magnetic fields; Magnetic recording; Power measurement; Voltage;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96425
