Speaker: Ulrich Goerlach

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For the read-out electronics of the CMS tracking system several variants of the APV design have been developed in the DMILL radiation hard technology: the APVD_AC and APVD_DC for AC- and DC-coupled silicon detectors, respectively, a rapid Front-end amplifier with a 25 ns peaking time based on a bipolar transistor for the possible use of MSGC or Silicon detectors and further adaptations of the circuit to the specific needs of MSGC detectors.  This introductory paper describes the motivation and strategy to  develop these options in DMILL for the CMS tracker and focuses  then in its main part on the results obtained with these different  prototypes in connection with silicon detectors and MSGC gas counters in test beams, with beta-sources and cosmic rays.

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