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- W1556553960 abstract "I. Abstract This paper has been written t o announce the design of a CMOS charge to voltage amplifier and it’s integration within an analog memory. Together they provide the necessary front e n d electronics for the CMS electromagnetic calorimeter (ECAL) preshower detector system in the LHC experiment foreseen at the CERN particle physics laboratory. The design and measurements of t h e amplifier realised in a 1.5μm bulk CMOS process as a 16 channel prototype chip are presented. Results show the m e a n gain and peaking time of = 1.74mV/mip, = 18ns w i th channel to channel variations; σ(peak_voltage) = 8% and σ(peak_time) = 6.5%. The dynamic range is shown to be linear ove r 400mips with an integral non l inearity (INL)=0.05mV as expressed in terms of sigma from the mean gain over t h e 400mip range. The measured noise of the amplifier was ENC=1800+41e/pF with a power consumption of 2.4mW/channel . The amplifier can support extreme levels of leakage current. The gain remains constant for up to 200μΑ of leakage current. The integration of this amplifier within a 32 channel, 128 cell analog memory chip “DYNLDR” is t h e n demonstrated. The DYNLDR offers sampling at 40MHz with a storage t ime of up to 3.2μs. It provides continuous Write/Read access with no dead time. Triggered data is protected within t h e memory until requested for readout which is performed at 2.5MHz. The memory is designed to have a s teerable dc level enabling maximum dynamic range performance. Measurements of the DYNLDR are presented confirming t h e original amplifier performance. The memory itself has a very low pedesta l non uniformity (σ (ped)) of 0 .9mV and a gain of 10mV/mip ." @default.
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- W1556553960 date "1996-07-15" @default.
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- W1556553960 title "A low power, large dynamic range, CMOS amplifier and analog memory for capacitive sensors" @default.
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