Title :
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
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;
Conference_Titel :
Nuclear Science Symposium, 1998. Conference Record. 1998 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-5021-9
DOI :
10.1109/NSSMIC.1998.775180
