Conception d'un circuit integre dedie a la reception des signaux optiques dans un systeme d'imagerie base sur la spectroreflectometrie infrarouge

The work presented in this master thesis is dedicated to the design and integration of an optical receiver module. This module is intended to be used as the front-end part of an optical imaging system. This system will be based on infrared spectroreflectometry technique. It will be constituted of at least three other modules, which will be developed in future works. These modules are an optical emitter, a control module and a wireless data transmission module.; Prior beginning the integrated front-end design, a deep technology review was done to know the state of the art in this field. This led us to choose a continuous wave imaging technique, which pros and cons will be discussed later. We found this technique suitable to collect the data required by our application.; In addition, we developed a prototype and a simulation model to help us scale the various elements found in the integrated front-end.; This front-end was manufactured using the TSMC N-well CMOS 0.18 mum technology. Measured performances are according to the post-layout simulations. The bandwidth is 50 kHz. The signal is amplified by two or three stages, depending on the chosen configuration. The total gain is between 113 and 161 dB and it is adjustable by applying an external voltage on a dedicated pin. The input-referred noise performance of 2.2 to 4.0 nA RMS allows us to obtain an output signal with the required signal-to-noise ratio. Finally, an analog mixer is also integrated and used as a demodulator to extract only the wanted signal and to reject any out of band noise.