A CMOS variable gain amplifier for PHENIX electromagnetic calorimeter and RICH energy measurements

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Description

A variable gain amplifier (VGA) has been developed equalizing the gains of integrating amplifier channels used with multiple photomultiplier tubes operating from common high-voltage supplies. The PHENIX lead-scintillator electromagnetic calorimeter will operate in that manner, and gain equalization is needed to preserve the dynamic range of the analog memory and ADC following the integrating amplifier. The VGA is also needed for matching energy channel gains prior to forming analog sums for trigger purposes. The gain of the VGA is variable over a 3:1 range using a 5-bit digital control, and the risetime is held between 15 and 23 ns using ... continued below

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7 p.

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Wintenberg, A.L.; Simpson, M.L.; Young, G.R.; Palmer, R.L.; Moscone, C.G. & Jackson, R.G. December 31, 1996.

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Description

A variable gain amplifier (VGA) has been developed equalizing the gains of integrating amplifier channels used with multiple photomultiplier tubes operating from common high-voltage supplies. The PHENIX lead-scintillator electromagnetic calorimeter will operate in that manner, and gain equalization is needed to preserve the dynamic range of the analog memory and ADC following the integrating amplifier. The VGA is also needed for matching energy channel gains prior to forming analog sums for trigger purposes. The gain of the VGA is variable over a 3:1 range using a 5-bit digital control, and the risetime is held between 15 and 23 ns using switched compensation in the VGA. An additional feature is gated baseline restoration. Details of the design and results from several prototype devices fabricated in 1.2-{mu}m Orbit CMOS are presented.

Physical Description

7 p.

Notes

OSTI as DE97001372

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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: DE97001372
  • Report No.: CONF-961123--9
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 434903
  • Archival Resource Key: ark:/67531/metadc683298

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  • December 31, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Jan. 25, 2016, 12:10 p.m.

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Wintenberg, A.L.; Simpson, M.L.; Young, G.R.; Palmer, R.L.; Moscone, C.G. & Jackson, R.G. A CMOS variable gain amplifier for PHENIX electromagnetic calorimeter and RICH energy measurements, article, December 31, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc683298/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.