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Development of the NMOS-based THz detectors and the readout systems for THz spectroscopy and imaging

Kołaciński C., Obrębski D., Marczewski J., Zbieć M., Kucharski K., Zagrajek P., Kopyt P.

International Journal of Microelectronics and Computer Science

2017

Vol. 8, nr 3

101--109

This paper summarizes the work performed within the Polish applied research project THzOnLine aiming at multipixel THz detectors based on selective NMOS transistors and its application in biology, medicine and security systems, completed in 2016. It starts with presentation of techniques applied for increasing the efficiency of THz detectors, i.e. used to maximize the output voltage yielded from NMOS-based detecting devices when exposed to a THz radiation. In the second part of this work the authors focuse on issues related to development of the readout electronics for these devices, as well as present the collection of integrated circuits and two complete measurement systems constructed by them.

Design of integrated readout circuit for NMOS THZ detectors based on chopper ampliﬁer concept

Kołaciński C, Obrębski D., Zagrajek P.

International Journal of Microelectronics and Computer Science

2014

Vol. 5, nr 1

14--24

This paper deals with design of readout circuit dedicated for NMOS-based terahertz detectors. The proposed architecture bases on chopper ampliﬁer and instrumentation ampliﬁer concepts. The main objectives were high gain (max. 100 dB) and proper operation with NMOS-based THz detectors. Three different architectures of measurement ampliﬁer designed for the research project are discussed in this paper. The designed chip was manufactured in AMS C35B4 process (350 nm feature size). Another issue described in this paper is dedicated, non-typical testing environment. At the end a few measurement results are shown.