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This paper describes the implementation of a SPI-programmable clock delay chip based on a Delay Locked Loop (DLL) to be used in the upgrade of the data acquisition electronics of the upgrade of the LHCb calorimeters. in order to shift the phase of the clock (25 ns) in steps of 1ns, with a 55ps jitter and 21.5ps of delay line linearity. The delay lines will be integrated into ICECAL, the LHCb calorimeter...
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