EEG monitor with capacitive electrodes and method of monitoring brain waves
AssigneeT&W Engineering A/S
InventorsSoren Kilsgaard, Mike Lind Rank, Michael Ungstrup, Morten Holm Jensen, Preben Kidmose
Life of this patent
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Abstract
A wearable EEG monitor for continuously monitoring the EEG of a user through capacitive coupling to an ear canal of a user includes an ear insert (1) for positioning within the human ear canal, having at least two capacitive electrodes (16) for recording a signal. The electrodes are coated with a dielectricum for electrical insulation. The electrodes are connected to an amplifier (17). The amplifier has an input impedance matched to the impedance of the electrodes. The invention further provides a method of monitoring brain waves.
Claims16
A method of monitoring brain waves comprising:
- arranging a capacitive electrode coated with a dielectricum in an ear insert,
- placing the ear insert within an ear canal of a human subject,
- arranging at least one reference electrode coated with a dielectricum in contact with the head of the subject,
- providing a processor,
- connecting the capacitive and reference electrodes to the processor, where the connection of the capacitive electrode to said processor comprises a signal wire and a shield, and the potential of the shield is kept close to the potential of the signal wire, and wherein a sample-and-hold circuit holds a potential of the shield close to a potential of the signal wire, and
- using the processor to record and process the signals from the electrodes thereby monitoring the brain waves.
Dependencies are inferred from the claim text.