Y.Abd Djawad, Y.Abd Djawad (2014) Lock-in Amplifier as a Sensitive Instrument for Biomedical Measurement : Analysis and Implementation. TELKOMNIKA Indonesian Journal of Electrical Engineering. pp. 7214-7222.
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Abstract
A measuring instrument plays important role in the biomedical measurement since the biological process in living organism generates very weak signal. Therefore, a reliable and sensitive measuring instrument is needed. In this study, a lock-in amplifier was analysed and tested. This paper presents an experiment to investigate the lock-in amplifier for biomedical measurement. An experiment using RC (resistor capacitor) tissue model to measure the voltage change related to impedance change was performed using a lock-in amplifier to evaluate the accuracy of the lock-in amplifier. Three different values of the capacitor in the RC tissue model were applied regarding to simulate small impedance changes. The measurement results were compared with the theoretical calculation and an impedance measurement system. An error analysis was conducted to investigate the accuracy of the measurement. The comparison result showed that impedance measurement using lock-in amplifier is an effective technique, which could able to measure very small voltage regarding impedance change in the RC tissue model. Keywords: biomedical, RC tissue model, impedance measurement, lock-in amplifier
| Item Type: | Article |
|---|---|
| Subjects: | KARYA ILMIAH DOSEN Universitas Negeri Makassar > KARYA ILMIAH DOSEN |
| Divisions: | KOLEKSI KARYA ILMIAH UPT PERPUSTAKAAN UNM MENURUT FAKULTAS > KARYA ILMIAH DOSEN KARYA ILMIAH DOSEN |
| Depositing User: | Pustakawan Amaluddin Zaihal |
| Date Deposited: | 25 Mar 2021 04:58 |
| Last Modified: | 25 Mar 2021 04:58 |
| URI: | http://eprints.unm.ac.id/id/eprint/19712 |
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