Title :
An integrated, CMOS, constant-fraction timing discriminator for multichannel detector systems
Author :
Simpson, M.L. ; Britton, C.L. ; Wintenberg, A.L. ; Young, G.R.
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
fDate :
30 Oct-5 Nov 1994
Abstract :
An integrated, CMOS, constant-fraction timing discriminator (CFD) that is designed to accommodate the special requirements of large, multichannel detector systems is described. This CFD features on-chip, zero-crossing shaping and an automatic walk setting to limit the number of user adjustments. The circuit is realized in the Orbit 1.2 micron, N-well, CMOS process and operates with a 5 V power supply. The time walk in a 100:1 dynamic range (-15 mV to -1.5 V) is less than ±250 ps for a 10 ns rise time-10 ns fall time signal, yet the power dissipation is about 2 mW/channel. The discriminator has a 170 μM pitch, is 800 μM long, and is structured for arraying multiple channels on a single die
Keywords :
CMOS integrated circuits; detector circuits; discriminators; nuclear electronics; power supplies to apparatus; 10 ns; 15 mV to 1.5 V; 5 V; Orbit 1.2 micron N-well CMOS process; automatic walk setting; discriminator; dynamic range; fall time signal; integrated CMOS CFD; integrated CMOS constant-fraction timing discriminator; multichannel detector systems; on-chip zero-crossing shaping; power dissipation; power supply; rise time; single die multiple channel arraying; user adjustments; CMOS process; Circuits; Computational fluid dynamics; Delay lines; Detectors; Dynamic range; Laboratories; Power dissipation; Power supplies; Timing jitter;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474405
