Monolitik kırmık görünür ışık haberleşme alıcısı geliştirilmesi

The VLC has drawn the attention in the last decade, which is simply based on the data transmission over the visible light (400nm-700nm). It is considered as an alternative to RF-based technologies and offers unlicensed frequency spectrum to the users. Despite the widely available optical bandwidth, LEDs that are used as a light source in VLC impose a limitation in data rate due to their limited bandwidth, which changes between a few hundred kHz and a few MHz. At this point, the equalization is one the most used method to achieve higher data rates in VLC system. There have been a growing works focusing on the equalization performed for VLC system. However, most of them offer an improvement in data rate at the discrete element level. They are not integrated and consume higher power. The works, which offer a solution at the chip level, are limited. Additionally, a monolithic optoelectronic receiver that can be operated with LEDs with different bandwidths and perform the equalization for the employed LED has been not investigated recently. This work is concentrated on the design and implementation of a monolithic optoelectronic receiver that includes a photodiode with the area of 300 umx 300 um, a TIA, an adjustable equalizer controlled by a switching mechanism, and an output buffer. The designed optoelectronic receiver is implemented in 130 nm CMOS technology and tested in an experimental setup. It is employed with three different phosphorescent white LEDs and for each of the employed LEDs around 20 times improvement in data rate to their bandwidth is achieved at a distance of 2 meters. The implemented chip has an area of 0.6 mm^2 and consumes around 2.05 mW.