A sub-picosecond digitally-controlled phase delay

D. Dehmeshki, E. Frahm, R. Rusack, R. Saradhy, Y. Tousi

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Article numberC03014
JournalJournal of Instrumentation
Issue number3
StatePublished - Mar 2022

Bibliographical note

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© 2022 IOP Publishing Ltd and Sissa Medialab.


  • Analogue electronic circuits
  • Digital electronic circuits
  • Instrumentation and methods for time-of-flight (TOF) spectroscopy
  • Timing detectors


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