Design and investigation of a low-noise preamplifier SPICE-model for pulsed nuclear quadrupole resonance spectroscopy

Oleksandr Moisiuk; Vladyslav Tkach; Andrii Samila

doi:10.1117/12.3008973

5 January 2024 Design and investigation of a low-noise preamplifier SPICE-model for pulsed nuclear quadrupole resonance spectroscopy

Oleksandr Moisiuk, Vladyslav Tkach, Andrii Samila

Author Affiliations +

Proceedings Volume 12938, Sixteenth International Conference on Correlation Optics; 1293804 (2024) https://doi.org/10.1117/12.3008973
Event: International Conference Correlation Optics (COR 2023), 2023, Chernivtsi, Ukraine

Abstract

A solution is proposed for the the front amplifier of the nuclear quadrupole resonance pulsed Fourier spectrometer, and its noise and signal characteristics are investigated using complex SPICE simulation of the electrical circuit diagram. The study made it possible to carefully analyze the main characteristics of the pre-amplifier and find out the possibilities of its application in the low-frequency region of the short-wave frequency range (2 MHz - 6 MHz), which is attractive for the possibility of identifying spin induction decay signals from explosive and narcotic substances. In particular, the optimal number of parallel-connected active elements of the input stage was investigated, which made it possible to reduce its own noise voltage to 12.8 nV/√Hz, and the modes of operation of the cascades of the entire circuit were determined, which made it possible to achieve a maximum gain of 74 dB at an input sensitivity of  10 V. The frequency characteristics of the amplifier were also studied, the analog bandpass filter and the elements of input and output impedance matching schemes were calculated.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Oleksandr Moisiuk, Vladyslav Tkach, and Andrii Samila "Design and investigation of a low-noise preamplifier SPICE-model for pulsed nuclear quadrupole resonance spectroscopy", Proc. SPIE 12938, Sixteenth International Conference on Correlation Optics, 1293804 (5 January 2024); https://doi.org/10.1117/12.3008973

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