The ATLAS pixel detector electronics

The ATLAS pixel detector readout electronics has been designed to extract the signal of the passage of ionizing particle from over 45000 diodes that form the ATLAS pixel detector module and to cope with both the very high data rate expected in the LHC environment and the trigger requirements in the ATLAS detector. The on-detector electronics must supply early data sparsification and reduction as well as local memory and derandomizing buffers. The readout functionality has been distributed over a two-level readout architecture. A description of the module readout architecture and an overview of the prototype results are reported. (5 refs).