scholarly journals Analysis of Multifrequency Impedance of Biologic Active Points Using a Dry Electrode System

2012 ◽  
Vol 18 (9) ◽  
pp. 864-869
Author(s):  
Min Soo Kim ◽  
Young-Chang Cho ◽  
Suk-Tae Seo ◽  
Chang-Sick Son ◽  
Yoon-Nyun Kim
Keyword(s):  
Electrode System ◽  
Dry Electrode

scholarly journals Validation of a wireless dry electrode system for electroencephalography

2015 ◽  
Vol 12 (1) ◽  
Author(s):  
Sarah N Wyckoff ◽  
Leslie H Sherlin ◽  
Noel Larson Ford ◽  
Dale Dalke
Keyword(s):  
Electrode System ◽  
Dry Electrode

Quality assessment of electroencephalography obtained from a “dry electrode” system

2012 ◽  
Vol 208 (2) ◽  
pp. 134-137 ◽  
Author(s):  
Jeremy D. Slater ◽  
Giridhar P. Kalamangalam ◽  
Omotola Hope
Keyword(s):  
Quality Assessment ◽  
Electrode System ◽  
Dry Electrode

Validation of a Dry Electrode System for EEG

2009 ◽  
Author(s):  
Justin R. Estepp ◽  
James C. Christensen ◽  
Jason W. Monnin ◽  
Iris M. Davis ◽  
Glenn F. Wilson
Keyword(s):  
Electrode System ◽  
Dry Electrode

scholarly journals Two-Wired Active Spring-Loaded Dry Electrodes for EEG Measurements

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4572 ◽  
Author(s):  
Seungchan Lee ◽  
Younghak Shin ◽  
Anil Kumar ◽  
Kiseon Kim ◽  
Heung-No Lee
Keyword(s):  
Alpha Rhythm ◽  
Electrical Coupling ◽  
Equivalent Circuit Model ◽  
Critical Issue ◽  
Electrode System ◽  
Low Noise ◽  
Contact Impedance ◽  
Noise Spectral Density ◽  
Input Capacitance ◽  
Dry Electrode

Dry contact electrode-based EEG acquisition is one of the easiest ways to obtain neural information from the human brain, providing many advantages such as rapid installation, and enhanced wearability. However, high contact impedance due to insufficient electrical coupling at the electrode-scalp interface still remains a critical issue. In this paper, a two-wired active dry electrode system is proposed by combining finger-shaped spring-loaded probes and active buffer circuits. The shrinkable probes and bootstrap topology-based buffer circuitry provide reliable electrical coupling with an uneven and hairy scalp and effective input impedance conversion along with low input capacitance. Through analysis of the equivalent circuit model, the proposed electrode was carefully designed by employing off-the-shelf discrete components and a low-noise zero-drift amplifier. Several electrical evaluations such as noise spectral density measurements and input capacitance estimation were performed together with simple experiments for alpha rhythm detection. The experimental results showed that the proposed electrode is capable of clear detection for the alpha rhythm activation, with excellent electrical characteristics such as low-noise of 1.131 μVRMS and 32.3% reduction of input capacitance.

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