Baseline Restoration for ATLAS MDTs_20 August, 1997__J
Development of an Octal CMOS ASD
For the ATLAS Muon Detector
Authors
John Huth, John Oliver, Werner Riegler – Harvard University, Cambridge Massachusetts
Eric Hazen, Christoph Posch, Jim Shank – Boston University, Boston Massachusetts
Abstract
Development of a CMOS amp / shaper / disc for the ATLAS Muon detector is presented. The first phase of this work has resulted in a simplified 4-channel device (ASD-lite) fabricated in HP 0.5 (m n-well CMOS operating at 3.3 volts. Highly accurate bsim3v3 models resulted in performance which closely matches SPICE predictions. On-chip crosstalk, a parameter not easily simulated, is measured to be below 0.5%. Results of chip measurements and on-chamber tests will be presented. This device will be used for early testing of ATLAS MTD (Monitored Drift Tube) modules. Further work on the final octal MDT-ASD, which will be fully programmable and include Wilkinson leading edge charge measurement, will be presented.
Front End Requirements
The Muon spectrometer aims for a PT resolution of 10% for 1 TeV muons. This translates into a single wire resolution requirement of ................
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