Two solutions for the analog signal processing of a particle detector, the foreseen upgrade of the LHCb calorimeter, are presented. High precision measurements and low noise are required for a signal transmitted over 12 meter cables that spills over the following clock cycle. One solution, cast in an ASIC, uses an active termination over the cable transmission line and a dual channel integration scheme to solve the integrator discharge problem. The other solution modifies slightly the actual configuration using delay lines to reflect the signal from one clock cycle and subtract it from the next. It is implemented using comercial out-of-the-shelf components.