Very front-end electronics for the LHCb preshower

This note describes a fully synchronous solution for the very front-end eletronics associated to the I,HCb preshower detector. After reminding first the main characteristics of the expected signal, the general design and the main features of this board are given. Integration of the analog signal is done on an ASIC, with LO-bit dynamic range, placed as close as possible to the read-out system. I: first results of a prototype are shown. Only the analog part is presented here, the digital part being on another board placed above the IICAI. and described in a companion note.