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Michael Rahaim, PhD Candidate Multimedia Communications Lab

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Presentation on theme: "Michael Rahaim, PhD Candidate Multimedia Communications Lab"— Presentation transcript:

1 MODULE 5: Photodiodes and VLC SUMMER CHALLENGE Electrical Engineering: Smart Lighting
Michael Rahaim, PhD Candidate Multimedia Communications Lab Boston University

2 Overview Photodiodes Integrated Circuits (ICs)
07/10/2015 Overview Photodiodes Integrated Circuits (ICs) Visible Light Communication Experiment Optical Channel Optical Signaling

3 07/10/2015 Photodiodes Current is generated proportional to the received optical power Responsivity [A/W] is a function of wavelength

4 Integrated Circuits Current mirrors (red)
07/10/2015 Integrated Circuits 3 2 4 7 6 Current mirrors (red) Differential amplifier (blue) Gain stage (magenta) Voltage level shifter (green) Output stage (cyan)

5 Experiment I Photodiode Circuit Optical Channel
07/10/2015 Experiment I Photodiode Circuit Optical Channel LEDs have an angle dependent emission pattern Photodiodes also have an dependent response Distance relates to signal attenuation Multipath attenuates AND adds time dispersion Tx Rx

6 07/10/2015 Experiment II Optical Signal between PCs

7 07/10/2015 Recap What did you today?

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