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Soraghan, Christopher John, Markham, Charles, Matthews, Fiachra and Ward, Tomas E. (2009) Triple wavelength LED driver for optical brain–computer interfaces. Electronics Letters, 45 (8).
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Official URL: http://scitation.aip.org/EL
Abstract
A dedicated triple wavelength LED driver is presented for optical
brain–computer interfacing (BCI). The solution caters for the constraints
of a common-anode grounded case and modulation up to
several kilohertz that allows source separation of light that has backscattered
from the brain. With total harmonic distortion of 0.95% and
a frequency range of ~40 kHz, the driver has application in a continuous
wave optical BCI. Other modulation strategies such as time division
multiplexing (TDM) are catered for, owing to input DC
coupling. Linearity in the optical output is maintained by the ‘load
sensing’ differential op-amp on the LED’s current limiting resistor,
which is the basis for the V-I conversion.
| Item Type: | Article |
|---|---|
| Keywords: | Triple wavelength; LED driver; optical brain–computer interfaces; |
| Academic Unit: | Faculty of Science and Engineering > Electronic Engineering |
| Item ID: | 1564 |
| Depositing User: | Dr Tomas Ward |
| Date Deposited: | 02 Oct 2009 10:35 |
| Journal or Publication Title: | Electronics Letters |
| Publisher: | Institution of Engineering and Technology |
| Refereed: | Yes |
| URI: | https://mural.maynoothuniversity.ie/id/eprint/1564 |
| Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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