Active Sensors for the Acquisition of Physiological Signals

The acquisition of physiological signals from human subjects has been an important research area for quite some time. Common issues involved in standard schemes for acquisition and processing of physiological signals, such as the possibility of the electrodes being easily damaged, or the probability of irritation upon prolonged usage, necessitate the development of active sensors for the acquisition of physiological signals. The present paper proposes the use of gold-plated copper electrodes with active compensation to obtain electroencephalogram (EEG), electrooculogram (EOG), and electrocardiogram (ECG) signals. The quality of the signal obtained has been compared with those obtained with standard sensors. The paper has two significant contributions: the proposal of sensors with active compensation, and preparation of a composite database of EEG, EOG, and ECG signals of 60 subjects under different experimental conditions. The proposed sensors would be useful for the development of prototype systems for Internet-of- Things (IoT)-based applications.