Design and Implementation of A PC-Based Digital Synchronous Detection System for Biological Signal Measurement

Author

Gan, K.B. ; Zahedi, E. ; Ali, M. A Mohd

Author_Institution

Univ. Kebangsaan Malaysia, Bangi

fYear

2007

fDate

12-11 Dec. 2007

Firstpage

1

Lastpage

4

Abstract

A PC-based digital lock-in amplifier was implemented completely in software (Labview) for photoplethysmograph (PPG) measurement. Experiments carried out to evaluate the performance of the amplifier show that the system can recover the signals up to 40 dB below the interference (ambient light). This system can be customized later to measure the trans-abdominal PPG signal of pregnant women for fetal heart rate detection.

Keywords

amplifiers; cardiology; medical signal detection; obstetrics; plethysmography; virtual instrumentation; Labview; PC-based digital synchronous detection system; biological signal measurement; digital lock-in amplifier; fetal heart rate detection; photoplethysmograph measurement; pregnant women; Frequency; Gallium nitride; Interference; Low-frequency noise; Noise level; Optical amplifiers; Optical noise; Phase noise; Signal design; Software measurement; Digital lock-in amplifier; photoplethysmography; virtual instrument;

fLanguage

English

Publisher

ieee

Conference_Titel

Research and Development, 2007. SCOReD 2007. 5th Student Conference on

Conference_Location

Selangor, Malaysia

Print_ISBN

978-1-4244-1469-7

Electronic_ISBN

978-1-4244-1470-3

Type

conf

DOI

10.1109/SCORED.2007.4451391

Filename

4451391