A novel version of the front-end electronics for the CMS Resistive Plate Ch
ambers is described. It is based on a new front-end ASIC, designed and manu
factured in the 0.8 mum BiCMOS technology by Austria Mikro Systeme. The mai
n improvements with respect to the previous version (Loddo ct al., Proceedi
ngs of the Fourth International Workshop on Resistive Plate Chambers and re
lated Detectors, Napoli, 15-16 October 1997) [1] concern the input impedanc
e, the threshold uniformity and the timing performance. Simulation and test
results will be shown, together with a brief description of the automatic
test system for both front-end chip and board. (C) 2000 Elsevier Science B.
V. All rights reserved.