Noise Analysis in VLC Optical Link based Discrette OPAMP Trans-impedance Amplifier (TIA)
Abstract: To design Visible
Light Communication (VLC) system, there are several requirements that needs to
be met. One of the requirements is an active component selection (e.g. Op Amp).
As an ideal communication system, VLC system has to be able to provides wide
bandwidth access with minimum noise. The Transimpedance amplifiers (TIAs) is
one of main components in optical system which is placed in the first stage of
receiver system. It is used to convert the current output from photodiode to
voltage. We have designed a 1 MHz fGBW TIA with low noise (in µVrms range).
This paper aims to explain the design and implementation of TIA circuit with
photovoltaic topology which cover empirical calculations and simulation of
TIA’s bandwidth and its noise sources, i.e. resistor feedback noise, current
noise, voltage noise and total noise based on RSS. The OP-AMP is chosen from
Texas Instruments product, OPA 380, and photodiode is chosen from OSRAM,
SFH213, then simulated by TINA-TI SPICE® software. The noise in TIA circuit is
analyzed clearly. The developed kit is ready to be implemented in VLC system.
Author: Syifaul Fuada
Journal Code: jptkomputergg170149
