FPGA based fast integrated real-time multi coincidence counter using a time-to-digital converter

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

6 Citations (Scopus)
414 Downloads (Pure)


The precise measurement of time is very important in many engineering and science applications. In some of the applications the time measurement is used to investigate the correlation between the timing of events and coincidence counters are employed for this purpose. Coincidence counters are commonly used as instruments in applications such as gamma ray correlation in positron emission tomography(PET) and gating events of interest from background noise in quantum physics experiments. In order to implement coincidence counters, time-to-digital converters can be used. While providing precise measurement, it is also important to maintain real-time operation and fast data processing due to the change in interest of events during the application. In this research, we have developed a real time multi-coincidence counting scheme in a Field Programming Gate Array (FPGA) based on our 8-channel time-to-digital converter(TDC) which we have published. With this method we have managed to combine an 8 channel TDC with a coincidence counter in the same FPGA chip while providing real-time operation and high precision. The smallest coincidence window, our system can provide is 15 ps and at 150 ps our system is capable of detecting the maximum number of coincidences. Also, the functionality of the coincidence counter has been proved by tests of coincidence rate as a function of window size and coincidence rate as a function of delay.

Original languageEnglish
Title of host publication2018 7th Mediterranean Conference on Embedded Computing (MECO 2018)
Subtitle of host publicationProceedings of a meeting held 10-14 June 2018, Budva, Montenegro
EditorsLech Jozwiak, Budimir Lutovac, Drazen Jurisic, Radovan Stojanovic
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
ISBN (Electronic)9781538656822
ISBN (Print)9781538656846
Publication statusPublished - Aug 2018
Event7th Mediterranean Conference on Embedded Computing, MECO 2018: MECO 2018 - Budva, Montenegro
Duration: 10 Jun 201814 Jun 2018

Publication series

ISSN (Print)2377-5475


Conference7th Mediterranean Conference on Embedded Computing, MECO 2018

Structured keywords

  • Bristol Quantum Information Institute
  • QETLabs
  • Photonics and Quantum


  • Avalanche Photo Diode
  • Coincidence Counting
  • Coincidence Detection
  • Field Programming Gate Array
  • Positron Emission Tomography
  • Time-to-Digital Converter


Dive into the research topics of 'FPGA based fast integrated real-time multi coincidence counter using a time-to-digital converter'. Together they form a unique fingerprint.

Cite this