FILTRES128: front-end readout electronic development for silicon microstrip detectors

We present a VLSI digital-analog readout electronic chain for silicon microstrip detectors. The characteristics of this circuit have been optimized for the high resolution tracker of the CERN CMS experiment. This chip consists of 128 channels at 50 micrometers pitch. Each channel is composed of a charge amplifier, a CR-RC shaper, an analog memory, an analog processor, an output FIFO which is read out serially by a multiplexer. This chip has been processed in the radiation hard technology DMILL. This paper describes briefly the architecture of the circuit and presents test results of the 128 channel full chain chip before and after irradiation up to 10 Mrad.