de Souza, Ivan (2003) Circuits mixtes reconfigurables appliqués à la mesure de signaux biomédicaux: réjection de l'interférence de mode commun. PhD thesis electronique et communications, ENST - COMELEC Communication et Electronique, ENST.

Full text available as: - Tese.pdf ( 18496 Kb )

Licence: Copyright

Abstract

Power line interference (50 or 60 Hz) during biopotentials signal measurements is a quite common problem. It must be carefully dealed with when high quality results are required for more exact diagnosis concerning a certain phyisiological function behavior. Paticularly if these signals interpretation is performed by digital systems, it becomes essential that power line interferences be mitigated in a way that the critical points of the biopotential signal waveform are precisely obtained. Measuring resetable mixed circuits allow a new configuration after the manufacturing process, in the direction of tunning themselves to a specific use. Therefore, such as circuits are suitable for projects in which their specifications must be changed according to the sensors in use and to the measured signal properties In this work, it is proposed a resetable mixed circuit for biopotential signal measurements, in special the electrocardiogram (ECG), electroencefalogram (EEG), electromiogram (EMG) and electroculogram (EOG) signals. In the circuit, it is included a block which dynamically perform the compensations instability that exist in the impedances of the electrodes, reducing the common mode interference due to the power network-pacient coupling.

Statistiques de consultation

Repository Staff Only: edit this item