ONSEMI C0.7 – Brno University of Technology, Czech Republic

ONSEMI C0.7 – Brno University of Technology, Czech Republic

The readout integrated circuit (ROIC) for self-compensating method of bolometer based IR focal plane arrays measurement

Department of Microelectronics (UMEL), Faculty of electrical engineering and communication (FEEC), Brno University of Technology (BUT), Brno, Czech Republic


Ing. Roman Prokop, PhD., Doc. Ing. Pavel Neužil, PhD., Ing. Jan Pekárek, PhD.


ON Semi 0.7µm C07M-A 2M/1P/PdiffC/HR

Die size

4647.6μm × 3256.2µm


The readout integration circuit contains a self-compensating system for fixed pattern noise reduction (FPNR) of focal plane arrays (FPAs) of infrared bolometer detectors. It is based on a first-order ΔΣ modulator serving as a non-saturating signal integrator. The used method suppresses both the effect of bolometer resistance due to non-uniformity across the FPA as well as the self-heating effect. The proposed system does not require any external or internal feedback loop for FPNR. This approach can be also used for other applications where a signal compensation is required.

Thanks to the EUROPRACTICE service we were able to process the first prototype in 2016 (Figure 2) with some adjustable parameters to prove the principle. In 2018 the final 10-channel ROIC for 10 x 10 or 1×100 bolometer matrix measurement (Figure 3).

Fig 1
Fig 2
Fig 3


The EUROPRACTICE service offers affordable prototyping for research. In addition, it has quite simple, easy and straightforward procedures to access the technology as well as to get support and information. The submission page is also very easy to work. The EUROPRACTICE service is always open to questions and suggestions related to delivery and billing.