  Large volume Liquid Argon Time Projection Chambers (LAr-TPC) are used and
proposed for neutrino physics and rare event search. Most of these detectors
make use of the scintillation light of liquid argon for trigger purposes. Two
different approaches can be adopted to provide these detectors with an
effective trigger system, relying upon analog or digital processing of signal
coming from photodetectors, like photomultiplier tubes or silicon
photomultipliers. Each method presents advantages and drawbacks, so the
implementation of a hybrid solution can benefit from both approaches. To this
purpose, an innovative electronic board prototype has been designed and
proposed for the use in large volume LAr-TPC detectors.
