The use of precision timing measurements will be a major tool at the HL-LHC, where it will be used to suppress pile-up and to search for long-lived particles. To control a reference clock with sub-picosecond accuracy, we have fabricated in the TSMC 65 nm process a digitally controlled phase shifter. It is composed of a chain of 66 cells, each with a digitally controlled planar wave guide with either a short or long delay. With this a reference clock's phase can be controlled to a precision of 200 fs with dynamic range of 12 ps.
@article{arxiv.2111.13548,
title = {A Sub-Picosecond Digitally-Controlled Phase Delay},
author = {Diba Dehmeshki and Erich Frahm and Roger Rusack and Rohith Saradhy and Yahya Tousi},
journal= {arXiv preprint arXiv:2111.13548},
year = {2023}
}
Comments
5 pages, 4 figures, presented at TWEPP 2021, submitted to JINST