The drift tube track finder muon trigger at the CMS experiment

The Compact Muon Solenoid (CMS) is a general purpose experiment designed to study proton-proton collisions at the Large Hadron Collider (LHC). At the LHC, proton beams will cross each other at a rate of 40 MHz, producing on average 20 p-p interactions. The CMS level-1 trigger must select interesting collisions at a rate smaller than 100 kHz. This report describes in particular the CMS drift tube track finder (DTTF) muon trigger. Its motivation, electronic implementation, and expected performance are presented.