Triple wavelength LED driver for optical brain – computer interfaces

  title={Triple wavelength LED driver for optical brain – computer interfaces},
  author={Christopher J Soraghan and Charles Markham and Fiachra Matthews and T. E. Ward},
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… CONTINUE READING
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