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 :
8/1/1995 12:00:00 AM
Abstract :
An integrated, CMOS, constant-fraction timing discriminator (CFD) 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 micron pitch, is 800 microns long, and is structured for arraying multiple channels on a single die
Keywords :
CMOS digital integrated circuits; detector circuits; discriminators; nuclear electronics; solid scintillation detectors; timing circuits; CMOS process; discriminator; integrated CMOS constant-fraction timing discriminator; large multichannel detector systems; multichannel detector systems; multiple channels; on-chip zero-crossing shaping; power dissipation; CMOS process; Circuits; Computational fluid dynamics; Delay lines; Detectors; Dynamic range; Laboratories; Power dissipation; Power supplies; Timing jitter;
Journal_Title :
Nuclear Science, IEEE Transactions on
