BIOMAT Database Logo BIOMAT Database Logo

Micropower non-contact EEG electrode with active common-mode noise suppression and input capacitance cancellation. 2009

Yu M Chi, and Gert Cauwenberghs
Department of Electrical and Computer Engineering, University of California, San Diego, CA 92092, USA. mlchi@ucsd.edu

A non-contact EEG electrode with input capacitance neutralization and common-mode noise suppression circuits is presented. The coin sized sensor capacitively couples to the scalp without direct contact to the skin. To minimize the effect of signal attenuation and channel gain mismatch, the input capacitance of each sensor is actively neutralized using positive feedback and bootstrapping. Common-mode suppression is achieved through a single conductive sheet to establish a common mode reference. Each sensor electrode provides a differential gain of 60 dB. Signals are transmitted in a digital serial daisy-chain directly from a local 16-bit ADC, minimizing the number of wires required to establish a high density EEG sensor network. The micropower electrode consumes only 600 microW from a single 3.3 V supply.

UI MeSH Term Description Entries
D004553 Electric Conductivity The ability of a substrate to allow the passage of ELECTRONS. Electrical Conductivity,Conductivity, Electric,Conductivity, Electrical
D004566 Electrodes Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum. Anode,Anode Materials,Cathode,Cathode Materials,Anode Material,Anodes,Cathode Material,Cathodes,Electrode,Material, Anode,Material, Cathode
D004569 Electroencephalography Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain. EEG,Electroencephalogram,Electroencephalograms
D004867 Equipment Design Methods and patterns of fabricating machines and related hardware. Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D005782 Gels Colloids with a solid continuous phase and liquid as the dispersed phase; gels may be unstable when, due to temperature or other cause, the solid phase liquefies; the resulting colloid is called a sol.
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000465 Algorithms A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task. Algorithm
D000669 Amplifiers, Electronic Electronic devices that increase the magnitude of a signal's power level or current. Amplifier, Electronic,Electronic Amplifier,Electronic Amplifiers
D012535 Scalp The outer covering of the calvaria. It is composed of several layers: SKIN; subcutaneous connective tissue; the occipitofrontal muscle which includes the tendinous galea aponeurotica; loose connective tissue; and the pericranium (the PERIOSTEUM of the SKULL). Scalps

Related Publications

Yu M Chi, and Gert Cauwenberghs
Common mode noise cancellation for electrically non-contact ECG measurement system on a chair.
January 2005, Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference,
Yu M Chi, and Gert Cauwenberghs
Common-mode noise cancellation circuit for wearable ECG.
April 2017, Healthcare technology letters,
Yu M Chi, and Gert Cauwenberghs
Common-Mode Noise Reduction in Noncontact Biopotential Acquisition Circuit Based on Imbalance Cancellation of Electrode-Body Impedance.
December 2020, Sensors (Basel, Switzerland),
Yu M Chi, and Gert Cauwenberghs
A micropower impedance meter for measuring electrode contact impedance.
April 1979, Journal of biomedical engineering,
Yu M Chi, and Gert Cauwenberghs
A biomedical tape recorder adapter with common-mode noise suppression.
January 1980, Biomedical sciences instrumentation,
Yu M Chi, and Gert Cauwenberghs
Active noise cancellation algorithms for impulsive noise.
April 2013, Mechanical systems and signal processing,
Yu M Chi, and Gert Cauwenberghs
EEG acquisition system based on active electrodes with common-mode interference suppression by Driving Right Leg circuit.
January 2015, Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference,
Yu M Chi, and Gert Cauwenberghs
Active Noise Cancellation with MEMS Resonant Microphone Array.
October 2020, Journal of microelectromechanical systems : a joint IEEE and ASME publication on microstructures, microactuators, microsensors, and microsystems,
Yu M Chi, and Gert Cauwenberghs
EEG adaptive noise cancellation using information theoretic approach.
January 2017, Bio-medical materials and engineering,
Yu M Chi, and Gert Cauwenberghs
Design Compact Absorptive Common-Mode Noise Suppression Filter with Series Unified Circuit.
January 2023, Sensors (Basel, Switzerland),
Copied contents to your clipboard!