Method for enhancing local eeg signals and eeg electrode device

An EEG electrode device for enhancing local EEG signals, comprising:

• an EEG signal receiving electrode assembly, including an electrode substrate, at least one central electrode and a plurality of peripheral electrodes, the central electrode and the peripheral electrodes being disposed on the electrode substrate, the peripheral electrodes being arranged around the central electrode;
• an EEG signal enhancement circuit, including an active dry electrode circuit and a common-mode EEG signal suppression filter circuit, the active dry electrode circuit including at least one first amplifier connected with the central electrode and a plurality of second amplifiers connected with the respective peripheral electrodes, the common-mode EEG signal suppression filter circuit including an amplifier and a common-mode signal circuit, the first amplifier being connected to a positive terminal of the amplifier, the second amplifiers being connected to the common-mode signal circuit, the common-mode signal circuit being connected to a negative terminal of the amplifier.