2012
DOI: 10.1088/1748-0221/7/10/c10003
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CBC2: a microstrip readout ASIC with coincidence logic for trigger primitives at HL-LHC

Abstract: We present the design of CBC2, the new version of the CMS Binary Chip ASIC for the readout of CMS Tracker Phase-two upgrade. CBC2, designed in 130nm CMOS, doubles the input channels to 254 and will be bump-bonded to the substrate. The ASIC is designed to instrument double layer modules in the outer tracker, consisting of two overlaid silicon sensors with aligned microstrips, and incorporates the logic to identify L1 trigger primitives in the form of "stubs": high transverse-momentum candidates which are isolat… Show more

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Cited by 23 publications
(22 citation statements)
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“…The function of this logic has been described in detail in previous publications [4]. The logic has been redesigned to provide half-strip resolution, such that even numbered clusters of hit strips are attributed a centre located between the two middle strips, avoiding the introduction of a positional bias, as in the CBC2.…”
Section: Stub Logicmentioning
confidence: 99%
“…The function of this logic has been described in detail in previous publications [4]. The logic has been redesigned to provide half-strip resolution, such that even numbered clusters of hit strips are attributed a centre located between the two middle strips, avoiding the introduction of a positional bias, as in the CBC2.…”
Section: Stub Logicmentioning
confidence: 99%
“…In order to fulfil this requirement, the hybrid is built on a four layer polyimide substrate, featuring HDI technology [7]. Seven dummy flip-chips, two active CMS Binary Chip second prototype (CBC2) [8] chips, several passive components and connectors are assembled on the circuit. The PS-MCK assembly requires a fold-over, such as the PS front-end hybrid (figure 4).…”
Section: Ps-mck Hybrid Requirements and Featuresmentioning
confidence: 99%
“…The binary architecture has been chosen to reduce the amount of data that needs to be processed, and to keep the L1 trigger rate of 100 kHz despite the increase in occupancy and the high pileup environment. The CBC is manufactured in 130 nm CMOS technology.With 254 channels the CBC2 [3], an evolved version from the first CBC design, can correlate 127 strips on the upper sensor with 127 strips on the lower sensor of the modules, as illustrated in Figure 1. The chip is foreseen to provide data to the L1 trigger, and once a L1 decision is received, it will send all hit data to the data acquisition system for further event reconstruction.…”
Section: Chip Design Overviewmentioning
confidence: 99%
“…Once the L1 trigger is received, they are loaded to a 32-deep buffer to be read out at 40 Mbps. The second data path passes through a logic block responsible for stub finding and read-out [3].…”
Section: Chip Design Overviewmentioning
confidence: 99%