EEG monitor with capacitive electrodes and a method of monitoring brain waves
First Claim
1. An EEG monitor for continuously monitoring the EEG of a user through capacitive coupling to an ear canal of a user, said EEG monitor comprising an ear insert for positioning within the ear canal of the user, and at least two capacitive electrodes arranged in the ear insert and adapted for recording a signal, the electrodes being coated with a dielectricum for electrical isolation of the electrodes, an amplifier connected to the electrodes for amplification of signals recorded by said electrodes, wherein the amplifier has an input impedance matched to an impedance of at least one of the electrodes, and wherein the one electrode is connected to the amplifier via a connection comprising a signal wire and a shield, and said monitor comprising a sample-and-hold circuit holding a potential of the shield close to a potential of the signal wire.
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Accused Products
Abstract
A wearable EEG monitor for continuously monitoring the EEG of a user through capacitive coupling to an ear canal of a user comprises an ear insert (1) for positioning within the human ear canal, comprising 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.
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Citations
15 Claims
- 1. An EEG monitor for continuously monitoring the EEG of a user through capacitive coupling to an ear canal of a user, said EEG monitor comprising an ear insert for positioning within the ear canal of the user, and at least two capacitive electrodes arranged in the ear insert and adapted for recording a signal, the electrodes being coated with a dielectricum for electrical isolation of the electrodes, an amplifier connected to the electrodes for amplification of signals recorded by said electrodes, wherein the amplifier has an input impedance matched to an impedance of at least one of the electrodes, and wherein the one electrode is connected to the amplifier via a connection comprising a signal wire and a shield, and said monitor comprising a sample-and-hold circuit holding a potential of the shield close to a potential of the signal wire.
Specification