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Fall 2013 ECE Senior Design: Portable Lock-in Amplifier for Brain-Machine Interfacing

Fall 2013 ECE Senior Design: Portable Lock-in Amplifier for Brain-Machine Interfacing. Jamie Norton Professor Scott Carney. Electroencephalography (EEG). Steady-state potentials. Brain Machine Interfaces. Noise problem. Software approach.

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Fall 2013 ECE Senior Design: Portable Lock-in Amplifier for Brain-Machine Interfacing

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  1. Fall 2013 ECE Senior Design:Portable Lock-in Amplifier for Brain-Machine Interfacing Jamie Norton Professor Scott Carney

  2. Electroencephalography (EEG)

  3. Steady-state potentials

  4. Brain Machine Interfaces

  5. Noise problem

  6. Software approach • Essentially seeks to take readings from a standard EEG amplifier, filter and combine them in some way to maximize accurate detection of steady-state potentials. • Variety of Methods • PSDA • MEC • CCA • Modified CCA

  7. Hardware Approach: Lock-in Amplifier If we have some sinusoidal signal, and a reference signal. And we multiply them…

  8. Goals • Develop a simple and portable lock-in amplifier for the detection of SSVEP signals. • Explore their use under ideal and non-ideal conditions. • Combine with EEG recordings to detect SSVEP entrainments by end of semester.

  9. References • Lock-in Amplifier Designhttp://www.youtube.com/watch?v=luiDMVAsyTc • http://www.phys.utk.edu/labs/modphys/lock-in%20amplifier%20experiment.pdf

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