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AssigneeThe Regents of the University of California
InventorsAhmadreza Danesh, Payam Heydari, Haoran Pu, Zoran Nenadic, An H. Do, Omid Malekzadeh Arasteh
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This invention discloses a non-invasive electroencephalography (BEG) signal recorder and a multiband active electrode (MAE) EEG cap array. A narrow-band amplification method is disclosed that divides the desired bandwidth of the input brain signal to smaller bands, each recorded using a separate amplification path. A novel twisted differential feedback topology is disclosed for both amplifiers and active filters having ultra-high input impedance. A one-wire EEG cap array of tightly connected MAEs is disclosed that improves the flexibility and portability of the EEG cap by reducing the number of wires between the EEG cap and the host processor. Due to having MAEs embedded inside electrodes, the output signals of electrodes are digital information. The tightly connected network of MAEs enables the reference electrode to be chosen dynamically. Moreover, the voltage of the reference node is adjusted using a correction feedback loop before each recording step.
A multiband active electrode (MAE) for electroencephalography (EEG), the MAE comprising a wide band filter for a sub-band with a frequency range from 0-30 Hz, and a plurality of narrow-band filters for sub-bands with frequencies above 30 Hz, wherein the MAE is configured to split a detected EEG signal into a plurality of sub-bands, and separately amplify and process each of the sub-bands, wherein at least one of the sub-bands has a frequency above 30 Hz.
A multiband active electrode (MAE) for electroencephalography (EEG), the MAE comprising a front-end processor and a digital processor, wherein the MAE is configured to split a detected EEG signal into a plurality of sub-bands, and separately amplify and process each of the sub-bands, wherein the front-end processor is configured to decompose the detected EEG signal into the plurality of sub-bands, amplify each sub-band, digitize each sub-band into a data stream, and serialize the data streams into a time-multiplexed data stream.
A multiband active electrode (MAE) for electroencephalography (EEG), wherein the MAE is configured to split a detected EEG signal into a plurality of sub-bands, and separately amplify and process each of the sub-bands, wherein the MAE is further configured to cancel artifacts via communicating with neighboring MAEs.
Dependencies are inferred from the claim text.