The NA62 straw detector is a gaseous detector consisting of 7200 drift 2.1 meter long tubes organized in 4 stations, each station having 4 views. It aims at providing tracking information with a good resolution and a charged particle veto signal. The drift time measurement performed on the front-end electronics is indispensable for good tracking resolution.
A new prototype of the read-out chain has been developed, constructed and tested. The on-detector electronics consists of an 8 channel analogue front end chip containing a fast preamplifier, a tail cancellation circuitry, base line restorer and a discriminator, followed by a FPGA-based read-out chips including a 1ns time to digital converter and the readout protocol to extract the data and transfer them to common NA62 readout module.
A complete description of the different components of this chain is given, as well as test beam results.