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

Volume

42

Issue

4

fYear

1995

fDate

8/1/1995 12:00:00 AM

Firstpage

762

Lastpage

766

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;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.467795

Filename

467795