Zero dead-time charge sensitive shaper for calorimeter signal processing

The main goal of the hadron calorimeter (HCAL) of the LHCb experiment is to provide data for the L0 trigger. Due to the high L0 trigger rate up to 1 MHz and high occupancy of the calorimeter cells, a zero dead-time is required for an operation in the LHC conditions with 25 nsec bunch crossing. The aim of the note is to describe the zero dead-time charge sensitive shaper for calorimeter signal processing offered in TP and analyse the parameters of the analogue front-end electronics components for the best performance of this method.