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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 multichannel readout system for spectral identification of materials

Kołaciński C., Obrębski D., Zbieć M., Zagrajek P.

International Journal of Microelectronics and Computer Science

2015

Vol. 6, nr 2

35--42

This paper addresses the work performed on development of the readout circuits for FET-based THz detectors. Ultimately, designed readout system is intended to work within the material identification equipment, which targeted to perform the spectral recognition of samples. At the beginning, the short introduction of the THz detection basics and main applications of the THz spectroscopy are presented. Next, the preceding work on single-channel readout circuit is shortly recalled, with a special emphasis on the last design version featuring selective chopper amplifier. This IC became the basis of the complete readout system addressed in next few sections of this paper. Finally, design of novel integrated circuit is presented, incorporating the multichannel readout circuit dedicated for pixel line.