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ADS1299: ADS1299 EEG measurement electrode on ear pod device !!!

HIEP LE
Prodigy 10 points
Part Number: ADS1299

Tool/software:

Hi all,

I am designing an ear pod device that has the function of measuring EEG on the human ear.

The concept is the two pods will be connected together by a wire and there is no the main module in the center of the wire, only 2 pods connected together.

As far as I know, to measure EEG signals, we will have the following electrodes: 1 or a number of electrodes connected to channels IN1P, IN2P,... of the ADS1299 chip, 1 CMS electrode is the reference electrode, 1 BIAS electrode.

Can you help me determine the optimal position on the ear and which electrodes I will need to use?

Can the BIAS electrode be removed? Or must both CMS and BIAS electrodes be used?

Hope to hear from you guys soon.

Thank you very much

Best regards

Hiep Le

  • 0
    TI__Guru 59726 points

    Hello Hiep,

    Thank you for your interest in our ADS1299.

    The BIAS and reference electrodes serve different purposes and are both necessary for EMG and EEG applications. The reference electrode is an input signal which is usually common to all channels. The BIAS electrode is an output signal and is used to establish a common-mode bias voltage on the body. This ensures that the input signals are within the acceptable input voltage range of the analog front-end circuit.

    The exact positioning of the electrodes to acquire bio-potential signals is not something we have the expertise to advise. You will have to determine the best electrode positioning based on your own research and trials.

    Regards,

    Ryan