  The main purpose of this work is to study the performance of the APV25 and
VMM3a readout chips with regards to using them in the front-end readout system
of a Triple-GEM detector. For the APV25, the Signal-to-Noise Ratio (SNR) was
estimated with a cosmics measurement around 84.29 +/- 0.12. For the VMM3a, the
noise of the chip was characterised in terms of the Equivalent Noise Charge
(ENC) in the full parameter space and with increasing input capacitance. For
the highest VMM gain and peaktime settings, the calculated ENC was about 300
electrons + 8 electrons/pF. Finally, a comparison was made between the two
chips, based on their noise, while also the setup for future cosmics
measurements with a VMM readout was prepared in order to also derive the VMM
SNR ratio.
