An Integrated, CMOS, Constant-Fraction Timing Discriminator for Multichannel Detector Systems1

M. L. Simpson, C. L. Britton, A. L. Wintenberg, G. R. Young

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

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.

Original languageEnglish
Pages (from-to)762-766
Number of pages5
JournalIEEE Transactions on Nuclear Science
Volume42
Issue number4
DOIs
StatePublished - Aug 1995

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