Investigation of Comparator Circuit Base-on Voltage Reference on Visible Light Communication System

In this work, we investigate the voltage reference of comparator circuit for the receiver circuit on visible light communication (VLC) system. The method is the voltage reference comparator of the VLC receiver circuit in the data pulse signal compensation which is the data pulse signal detection circuit. In the experiment, we consider the signal with Manchester modulation on the FPGA board of the data signal via channel with the range of light intensity between 300 to 1,300 lux. The result of experiment sent the data inputs via the white LED at a distance of 70 - 90 centimeters which measured the signal outputs with the average percentage of bit error 0.145.