  The present dissertation describes design, qualification and operation of
several electronic instrumentations for High Energy Particle Physics
experiments (LHCb) and Neutrino Physics experiments (CUORE and CUPID). Starting
from 2019, the LHCb experiment at the LHC accelerator will be upgraded to
operate at higher luminosity and several of its detectors will be redesigned.
The RICH detector will require a completely new optoelectronic readout system.
The development of such system has already reached an advanced phase, and
several tests at particle beam facilities allowed to qualify the performance of
the entire system. In order to achieve a higher stability and a better power
supply regulation for the frontend chip, a rad-hard low dropout linear
regulator, named ALDO, has been developed. Design strategies, performance tests
and results from the irradiation campaign are presented. In the Neutrino
Physics field, large scale bolometric detectors, like those adopted by CUORE
and its future upgrade CUPID, offer unique opportunities for the study of
neutrinoless double beta decay. Their operation requires particular strategies
in the readout instrumentation, which is described here in its entirety. The
qualification and optimization of the working parameters as well as the
integration of the system in the experimental area are also thoroughly
discussed,together with the latest upgrades of two electronic subsystems for
the future CUPID experiment
