In today’s world, technology is so developed that it is possible to transmit huge amounts
of data in a short time.
In the experiments with high energy levels in laboratories carried out in CERN, it is
essential to have a method capable of carrying all this information and at the same time
of being tolerant to the radiation from these same experiments.
Optical fibres are currently the best method transmitting the data created by these
experiments. In order to receive the information from the optical fibre a Photodiode (PD)
is used to produce current from the light of the optical fibre. This current is however
small. It is necessary to use an amplifier which, in addition to amplifying the current
coming from the photodiode, also converts it into a voltage for the next phases of the
optical receiver.
These amplifiers are known as transimpedance amplifiers and are the critical part of
optical receivers since an high gain is required to amplify the current from the photodiode
and at the same time a high bandwidth to receive the hight data rate signals.
This thesis presents a complete analysis of these amplifiers, showing various types of
topologies and their pros and cons. In order to arrive at the amplifier with the desired
characteristics, this thesis uses mathematical equations that allow us to describe the
operation of the Transimpedance Amplifier (TIA) and to determine the optimal range
between the gain, the bandwidth and the noise of the amplifier (input referred noise).
All the theoretical expressions as well as the behaviour of the whole system was verified
using electrical simulations