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Automatika : časopis za automatiku, mjerenje, elektroniku, računarstvo i komunikacije, Vol. 57 No. 1, 2016.

Izvorni znanstveni članak

https://doi.org/10.7305/automatika.2016.01.1583

Effect of transformer symmetry on intrabody communication channel measurements using grounded instruments

Željka Lučev Vasić orcid id orcid.org/0000-0003-2858-4629 ; Department of Electronic Systems and Information Processing, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, HR-10000, Zagreb, Croatia
Igor Krois ; Department of Electronics, Microelectronics, Computer and Intelligent Systems, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, HR-10000, Zagreb, Croatia
Mario Cifrek orcid id orcid.org/0000-0002-7554-0824 ; Department of Electronic Systems and Information Processing, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, HR-10000, Zagreb, Croatia

Puni tekst: engleski pdf 2.145 Kb

str. 15-26

preuzimanja: 717

citiraj

Sažetak

Transformers with one winding terminal symmetrical with respect to ground (capacitances between their terminals and ground are the same) are referred to as balun transformers, and are often used for decoupling in the measurements of the intrabody communication (IBC) system transmission characteristics. We measured IBC system amplitude and phase transmission characteristics using three types of galvanic decouplers: non-symmetric RF transformers, balun transformers with center tap grounded and balun transformers with center tap floating. Four possible electrode configurations (AA, AB, BA, and BB) and four electrode arrangement (GSGS, GSSG, SGGS, and SGSG), result in a total of 16 measurement scenarios for each of three measurement setups. We showed that the change in the measured amplitude for different signal and ground electrode arrangements while measuring with non-symmetric transformers is influenced by the transformer symmetry to the ground, and not the capacitive intrabody communication transmission characteristics. The change of the amplitude in case symmetric balun transformers are used is negligible for practical purposes.

Ključne riječi

Capacitive coupling; electrode configuration and arrangement; intrabody communication (IBC); transformer symmetry

Hrčak ID:

165484

URI

https://hrcak.srce.hr/165484

Datum izdavanja:

1.9.2016.

Podaci na drugim jezicima: hrvatski

Posjeta: 1.513 *