The ASDQ ASIC [Central Outer Tracker CDF upgrade application]

Author

Bokhari, W.M. ; Heinrich, J.G. ; Lockyer, N.S. ; Newcomer, F.M.

Author_Institution

Pennsylvania Univ., Philadelphia, PA, USA

Volume

1

fYear

1998

fDate

1998

Firstpage

445

Abstract

The ASDQ ASIC provides eight channels of complete signal processing for the Central Outer Tracker (COT) being built for the CDF upgrade. The ASDQ has been fabricated using the well-characterized and radiation tolerant MAXIM SHPi analog bipolar process. It optimizes competing requirements of short measurement time (≈7 ns), good double pulse resolution (~20 ns), low power (≈35 mW/ch) and low operational threshold (~2-3 fC). It contains a low noise pseudo-differential preamplifier, ion tail compensation and multipole shaper, baseline restorer, comparator with an optional linear width encoded charge measurement and an on-chip calibration circuit. The design of the circuit is based on GARFIELD simulations of COT tracks and the response of a prototype chamber to cosmic rays and Fe⁵⁵ sources

Keywords

application specific integrated circuits; calibration; charge measurement; nuclear electronics; preamplifiers; pulse shaping circuits; 20 ns; 7 ns; ASDQ ASIC; CDF upgrade; Fe⁵⁵ source; GARFIELD simulation; MAXIM SHPi analog bipolar process; baseline restorer; calibration circuit; comparator; cosmic rays; double pulse resolution; ion tail compensation; measurement time; operational threshold; pseudo-differential preamplifier; Application specific integrated circuits; Circuit noise; Multi-stage noise shaping; Power measurement; Preamplifiers; Pulse measurements; Signal processing; Signal resolution; Time measurement; Variable speed drives;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1998. Conference Record. 1998 IEEE

Conference_Location

Toronto, Ont.

ISSN

1082-3654

Print_ISBN

0-7803-5021-9

Type

conf

DOI

10.1109/NSSMIC.1998.775180

Filename

775180