Drift Tube System Electronics Upgrade in the context of High Luminosity LHC

The Drift Tube (DT) system is the primary detector in the barrel region of the CMS dedicated to the measurement of muon tracks. The signals from about 172 000 DT cells must be fast and synchronously acquired to deliver the information about hits. In the context of the increasing luminosity of the LHC, in preparation for Phase 2, the DT system is being upgraded. The main focus of this upgrade is the development of a new generation of read-out electronics based on FPGA technology. The new on-chamber electronics will provide higher acquisition rates, increased radiation tolerance, and improved flexibility of the trigger settings for the DT system. The DT-chambers will be equipped, depending on chamber type, with 3 to 5 single type boards called On-Board electronics for Drift Tubes (OBDTs). Along with better read-out characteristics, the OBDTs ensure fewer intermediate elements in the read-out chain. This contribution presents an overview of the new read-out chain and OBDT architecture.