Title :
A Programmable Analogue Front-End ASIC for Gas Micro-Strip Detectors having a wide range of Input Capacitance
Author :
Khalid, Farah F. ; Jones, Lawrence L. ; Stephenson, Richard ; Lipp, John D.
Author_Institution :
CCLRC, Rutherford Appleton Lab., Oxfordshire
fDate :
Oct. 29 2006-Nov. 1 2006
Abstract :
The FREDA ASIC is designed as a performance upgrade for the front-end electronics of the ´HOT´ series gas micro strip detectors. These detectors have 512 channels each having different capacitance ranging from 2 pF-80 pF. FREDA is a 16 channel ASIC each of which consists of a preamplifier, a programmable CR-RC shaper, a programmable gain amplifier and an output buffer. The charge preamplifier contains a leakage current compensation circuit to avoid voltage offset due to leakage current. The CR-RC shaper has 7 programmable peaking time settings from 50 ns-240 ns. The programmable gain amplifier has 4 gain settings of 1, 2, 4 and 8. This ASIC has been designed using a 0.35 mum CMOS process. The ASIC architecture and generation are described including simulated and measured results.
Keywords :
amplifiers; application specific integrated circuits; capacitance; nuclear electronics; position sensitive particle detectors; programmable circuits; proportional counters; 2 to 80 pF; CMOS process; FREDA ASIC; charge preamplifier; gas microstrip detectors; input capacitance; leakage current compensation circuit; multichannel ASIC; output buffer; programmable CR-RC shaper; programmable analogue front-end ASIC; programmable gain amplifier; Application specific integrated circuits; CMOS process; Capacitance; Event detection; Leakage current; Preamplifiers; Radiation detectors; Voltage; X-ray detection; X-ray detectors;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2006. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-0560-2
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2006.355985
