Electrode and leakage current test in EEG monitor with implantable part

摘要

The personally wearable EEG monitor includes an implantable electrode unit including at least two electrodes for measuring a person's EEG signal. The electrode portion includes an electronic circuit disposed in the housing, and each electrode is disposed outside the housing. The electronic circuit is configured to receive an analog signal from the electrode (s) and includes an analog-to-digital converter that converts the analog EEG signal into a digital signal. The electrode unit includes a test circuit for testing the functionality of the electrode unit. The test circuit includes a capacitor coupled in series connection to at least one electrode. The test circuit also includes a test signal generator for providing a test signal, wherein the test signal generator is configured to be coupled between the electrode (s) and the electronic circuit during testing, and the EEG monitor is A signal originating from the signal generator is analyzed to identify a fault in the electrode section.