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The Use of Synchronous Demodulation for the Measurement of Eye Movements by Means of an Ocular Magnetic Search Coil

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3 Author(s)
McElligott, J.G. ; Department of Pharmacology, Temple University School of Medicine ; Loughnane, M.H. ; Mays, L.E.

This paper describes an eye position monitoring system that can be built using inexpensive components for the demodulator. It uses a two-frequency (f and 2f) technique which provides excellent channel separation with a miinimum of adjustment and wide dynamic signal range. Phasing errors produce no crosstalk effects for a pure sine-wave signal. It should be noted that this system will also work as a single-frequency two-phase system, merely by changing the driver unit.

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Biomedical Engineering, IEEE Transactions on  (Volume:BME-26 ,  Issue: 6 )