Ilkka Nissinen
Associate professor Ilkka Nissinen

Ilkka Nissinen

D.Sc. (Tech.)

Associate professor

33 peer reviewed publications in international journals. The publications have been cited 437 times, of which the most cited publication accounts for 65 citations. The author has a h-index of 11.00. (Google scholar)


Ilkka Nissinen received  D.Sc.(Tech.) degree in electrical engineering from University of Oulu, Finland, in 2011. Ilkka Nissinen started as an Associate professor in Circuits and Systemes Research Unit on November 2018.

His research interests include the design of time interval measurement architectures for the integrated sensors arrays (SPAD arrays) that can be used in a time-gated Raman spectroscopy, time domain diffuse optics and a pulsed time-of-flight laser range finding.

Research interests

  • Time resolving CMOS single-photon avalanche line sensors
  • CMOS Raman line sensor
  • Integrated time-to-digital converter

Project funding

  • Academy of Finland program: Radiation detectors for health, safety and security RADDESS, 2018-2012: Consortium project, Single-photon detector array for simultaneous label-free Raman and fluorescence lifetime spectroscopy.


  • Principles of Electronics Design 5 cp. (521431A)
  • Electronics Design I 5 cp. (521432A)
  • Electronics Design II 6 cp. (521401S)
  • Electronics Design III 6 cp. (521435S

Research groups

  • Associate professor, Circuits and Systems

Selected publications

  • Kekkonen, Jere; Nissinen, Jan; Kostamovaara, Juha; Nissinen, Ilkka (2018) Distance-resolving raman radar based on a time-correlated CMOS single-photon avalanche diode line sensor. - Sensors 18 (10), 3200 . [Original] [Self-archived]
  • Nissinen, Ilkka; Nissinen, Jan; Keränen, Pekka; Stoppa, David; Kostamovaara, Juha (2018) A 16 x 256 SPAD Line Detector With a 50-ps, 3-bit, 256-Channel Time-to-Digital Converter for Raman Spectroscopy. - IEEE Sensors Journal 18 (9), 3789-3798 . [Original] [Self-archived]
  • Heilala, Bryan; Mäkinen, Ari; Nissinen, Ilkka; Nissinen, Jan; Mäkynen, Anssi; Perämäki, Paavo (2018) Evaluation of time-gated Raman spectroscopy for the determination of nitric, sulfuric and hydrofluoric acid concentrations in pickle liquor. - Microchemical journal 137, 342-347 . [Original]
  • Nissinen, J.; Nissinen, I.; Jahromi, S.; Talala, T.; Kostamovaara, J. (2018) Time-gated CMOS SPAD and a Quantum Well Laser Diode with a CMOS Driver for Time-Resolved Diffuse Optics Imaging. (Artikkeli tieteellisessä konferenssijulkaisussa). - 2018 IEEE Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC),30-31 October 2018, Tallinn, Estonia . Ei sarjaa/No series. 1-4. [Original]
  • Holma, Jouni; Nissinen, Ilkka; Nissinen, Jan; Kostamovaara, Juha (2017) Characterization of the Timing Homogeneity in a CMOS SPAD Array Designed for Time-Gated Raman Spectroscopy. - IEEE Transactions on Instrumentation and Measurement 66 (7), 1837-1844 . [Original]
  • Nissinen, Ilkka; Nissinen, Jan; Keränen, Pekka; Kostamovaara, Juha (2017) On the effects of the time gate position and width on the signal-to-noise ratio for detection of Raman spectrum in a time-gated CMOS single-photon avalanche diode based sensor. - Sensors and Actuators B: Chemical 241, 1145-1152 . [Original] [Self-archived]
  • Kostamovaara, Juha; Huikari, Jaakko; Hallman, Lauri; Nissinen, Ilkka; Nissinen, Jan; Rapakko, Harri; Avrutin, Eugene; Ryvkin, Boris (2015) On Laser Ranging Based on High-Speed/Energy Laser Diode Pulses and Single-Photon Detection Techniques. - IEEE Photonics Journal 7 (2), 7800215
  • Nissinen, I.; Nissinen, J.; Holma, J.; Kostamovaara, J. (2014) A TDC-based 4x128 CMOS SPAD array for time-gated raman spectroscopy. (Artikkeli tieteellisessä konferenssijulkaisussa). - Proceedings of the 40th European solid-state circuit conference (ESSCIRC 2014). Proceedings of the European Solid-State Circuits Conference. 139-142
  • Nissinen Ilkka Kristian ja Kostamovaara Juha Tapio (2010) Jitter characteristics of an on-chip voltage reference-locked time-to-digital converter. - Analog Integrated Circuits and Signal Processing 64 (3), 271-280 . [Original]
  • Nissinen Ilkka, Kostamovaara Juha (2009) On-Chip Voltage Reference-Based Time-to-Digital Converter for Pulsed Time-of-Flight Laser Radar Measurement. - IEEE Transactions on Instrumentation and Measurement 58 (6), 1938-1948 . [Original]
  • Nissinen Jan, Nissinen Ilkka, Kostamovaara Juha (2009) Integrated receiver including both receiver channel and TDC for a pulsed time-of-flight laser rangefinder with cm-level accuracy. - IEEE Journal of Solid-State Circuits 44 (5), 1486-1497

Thesis supervisions

Supervision of PhD thesis
  • Jere Kekkonen (work started 2018)

    Tuomo Talala (work started 2018)

Supervision of Master thesis
  • Master's thesis (2018): Timing skew compensation methods for time-gated Raman spectroscopy, Tuomo Talala (Supervised)

  • Master's thesis (2018): Depth-resolving Raman spectrometer based on a time-correlated CMOS single-photon avalanche diode line sensor for depth analysis of turbid media, Jere Kekkonen (Supervised)

  • Master's thesis (2013): FPGA controlled SPAD matrix test environment, Jouni Holma (Co-supervised)

  • Master's thesis (2011): Time-gated 128 x 8 pixel SPAD matrix for Raman spectroscopy, Antti-Kalle Länsman Co-supervised)