Integrated constant-fraction discriminator shaping techniques for the PHENIX lead-scintillator calorimeter

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The suitability of several on-chip constant-fraction discriminator (CFD) shaping methods for use in the multichannel PHENIX Lead- Scintillator detector has been investigated. Three CFD circuits utilizing a distributed R-C delay-line, a lumped-element R-C delay- line and the Nowlin shaping method have been realized in a standard 1. 2-{mu} n- well CMOS process. A CFD using ideal delay-line shaping was also studied for comparison. Time walk for 5 ns risetime input signals over a dynamic range of - 2 V to - 20 mV was less than {+-} 175 ps, {+-} 150 ps, {+-} 150, and {+-} 185 ps while worst ... continued below

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6 p.

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Jackson, R.G.; Blalock, T.V.; Simpson, M.L.; Wintenberg, A.L. & Young, G.R. December 31, 1996.

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The suitability of several on-chip constant-fraction discriminator (CFD) shaping methods for use in the multichannel PHENIX Lead- Scintillator detector has been investigated. Three CFD circuits utilizing a distributed R-C delay-line, a lumped-element R-C delay- line and the Nowlin shaping method have been realized in a standard 1. 2-{mu} n- well CMOS process. A CFD using ideal delay-line shaping was also studied for comparison. Time walk for 5 ns risetime input signals over a dynamic range of - 2 V to - 20 mV was less than {+-} 175 ps, {+-} 150 ps, {+-} 150, and {+-} 185 ps while worst case rms timing jitter measured 85 ps, 90 ps, 100 ps, and 65 ps, respectively, for the four methods mentioned above. Area requirements for the three candidate methods tested including the fraction circuit were 172 {mu} X 70 {mu}, 160 {mu} X 65 {mu}, 179 {mu} X 53 g, respectively. The fraction circuit area for the external delay-line circuit was 67 {mu} X 65 {mu}. Each shaping method studied consumed no power from the dc supply.

Physical Description

6 p.

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OSTI as DE97001342

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  • Institute of Electrical and Electronic Engineers (IEEE) nuclear science symposium and medical imaging conference, Anaheim, CA (United States), 2-9 Nov 1996

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  • Other: DE97001342
  • Report No.: CONF-961123--6
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 434409
  • Archival Resource Key: ark:/67531/metadc674316

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  • December 31, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Jan. 19, 2016, 6:50 p.m.

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Jackson, R.G.; Blalock, T.V.; Simpson, M.L.; Wintenberg, A.L. & Young, G.R. Integrated constant-fraction discriminator shaping techniques for the PHENIX lead-scintillator calorimeter, article, December 31, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc674316/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.