Design and Development of a Novel EOG Biopotential Amplifier

Electric potentials are generated across the Cornea and Retina of the eyes as a result of the movement of eyeballs within the conductive environment of the skull. This is referred to as the Cornea-Retinal Potential (CRP) and is the source of the Electrooculogram (EOG) signal. Since the occurrence of DC drifts and numerous artifacts along with power-line interference had made the EOG signal quite unattractive for pragmatic biomedical applications, our primary concerns were the elimination of these DC drifts and other artifacts while striving to maintain signal linearity. The paper describes the design and development of a novel EOG signal acquisition system that counters all the above mentioned problems making it suitable for both theoretical analysis as well as industrial applications. Keywords— Biomedical Signal Processing, Biopotential Amplifier, DC Drifts, Electrooculogram (EOG) Signal, Signal Acquisition, Signal Linearity, Type II Chebyshev IIR Filter.