2000-010 Abstract This note describes the technical implementation of the first part of the Level0 Calorimeter trigger, the one integrated in the front-end card After a short review of the overall system, the architecture of the front-end card is depicted. Then the main operation, sum and select, is described in detail, with the FPGA implementation. The connection problem is then address, with cable and backplane solutions. Simulation, and future work is also described
