Eric Hazen, Jim Shank
Boston University
John Huth, John Oliver
Harvard University
Werner Riegler
CERN, Geneva, Switzerland
October 10, 1996
An integrated readout system for the ATLAS Monitored Drift Tubes
(MDTs) is presented, based on an eight-channel CMOS
amplifier-shaper-discriminator (ASD) chip. Extensive pulse
shape studies provide
the basis for a multi-channel signal processing architecture, which
may extract leading edge, trailing edge, multi-track and ADC information.
Key elements have been prototyped in full-custom IC's, and show that the
required performance can be obtained with 1.2 
CMOS technology.
Test results for a pre-amplifier IC, a discriminator IC, and a multi-channel
integrated amplifier+discriminator are presented, along with plans for a
full-scale integrated ASD.