Effect of transformer symmetry on intrabody communication channel measurements using grounded instruments
| Autor: | Igor Krois, Željka Lučev Vasić, Mario Cifrek |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Capacitive coupling
Engineering General Computer Science business.industry Capacitive sensing Center tap 0206 medical engineering Electrical engineering 020206 networking & telecommunications 02 engineering and technology 020601 biomedical engineering law.invention Amplitude Control and Systems Engineering Balun law Electrode 0202 electrical engineering electronic engineering information engineering Electrode configuration and arrangement Intrabody communication (IBC) Transformer symmetry Transformer business |
| Zdroj: | Automatika. 57:15-26 |
| ISSN: | 1848-3380 0005-1144 |
| DOI: | 10.7305/automatika.2016.01.1583 |
| Popis: | 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 arrangements (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. |
| Databáze: | OpenAIRE |
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