INVESTIGADORES
SPINELLI Enrique Mario
artículos
Título:
Estimation of stray coupling capacitances in biopotential measurements
Autor/es:
MARCELO HABERMAN; A. CASSINO; E SPINELLI
Revista:
MEDICAL AND BIOLOGICAL ENGINEERING AND COMPUTING
Editorial:
SPRINGER HEIDELBERG
Referencias:
Año: 2011 vol. 49 p. 1067 - 1071
ISSN:
0140-0118
Resumen:
Abstract
Biopotential measurements are very sensitive to
electromagnetic interference (EMI) from power-lines.
Interference conditions are mainly imposed by electric-field
coupling, whose effects can be described by coupling capacitances.
The main of them are the patient-to-ground and the
patient-to-power-line capacitances, usually denoted asCB and
CP, respectively. A technique to estimate these elements and
experimental data obtained in different environmental conditions
are presented. It was found that CB ranges from hundreds
of pF to nF, andCP fromhundredths of pF to fewpF. The
presented technique also lets it know the small amplifier-toground
and amplifier-to-power-line capacitances. The
knowledge of all these capacitances allows estimating the
EMI conditions that biopotential amplifiers can be subject to,
thus, resulting useful data for specifying their design
requirements and constraints in real working conditions.
