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Low Noise Front End ASIC with Current Mode Active Cooled Termination for the Upgrade of the LHCb Calorimeter

Abstract : An integrated circuit for the Upgrade of the LHCb Calorimeter front end electronics is presented. The circuit is based on a current mode input stage followed by two fully differential interleaved channels with a switched integrator and a track and hold. The input stage employs an electronically cooled input termination to achieve the stringent noise requirements. Compared to previous designs, its novelty relies in the use of two current feedback loops used to decrease and control the input impedance of a common base stage. A first prototype has been designed in AMS SiGe BiCMOS 0.35um technology. Key measurements have been performed. Reflection coefficient is smaller than 1% for the full dynamic range, which is 12 bits. Relative linearity error is below 1 %.
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http://hal.in2p3.fr/in2p3-00643267
Contributor : Sabine Starita <>
Submitted on : Monday, November 21, 2011 - 3:04:04 PM
Last modification on : Wednesday, September 16, 2020 - 4:21:32 PM

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IN2P3 | LAL | CNRS

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D. Gascon, E. Picatoste, C. Abellan, O. Duarte, L. Garrido, et al.. Low Noise Front End ASIC with Current Mode Active Cooled Termination for the Upgrade of the LHCb Calorimeter. Workshop on Room-Temperature Semiconductor X-ray and Gamma-Ray Detectors, IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011, Oct 2011, Valencia, Spain. pp.1445-1452, ⟨10.1109/NSSMIC.2011.6154346⟩. ⟨in2p3-00643267⟩

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