M.M. Alferova1, M.S. Alferov2

1 Central Research Automobile and Motor Vehicle Institute “NAMI” (Moscow, Russia)

2 FSUE “Russian Federal Nuclear Center - Zababakhin - All Russia Research Institute of Technical Physics” (Moscow, Russia)

1 koteyka.mn@gmail.com; 2 AlferovMS@yandex.ru

Problem statement. The output amplifier stage is one of the key elements in systems for receiving, transmitting, measuring and processing electronic signals. The main requirement for such devices is to ensure a low level of phase noise at a given output signal value. However, there is very little research on the contribution of amplifiers to the spectral characteristics of such systems, and therefore the study of various circuits and types of amplifiers for their contribution to the phase noise level of the entire system is relevant.

The purpose of the research in this article is computer modeling and analysis of output amplifier stages with small phase deviations at a reference frequency of 80 MHz, as well as the selection of the optimal type of amplifier based on this study.

The result of the work is a demonstration of the advantages of a balanced differential amplifier as a reference signal amplifier. It is shown that its use makes it possible to significantly reduce the level of phase noise and spurious phase modulation of the output reference signal compared to other amplifier options discussed in the article.

Practical significance. The results obtained can be used to construct and optimize circuits of output amplifier stages at frequencies close to 80 MHz.

Alferova M.M., Alferov M.S. Analysis of the operation of the output amplification stages at 80 MHz. Radiotekhnika. 2026. V. 90. № 4. P. 126−134. DOI: https://doi.org/10.18127/j00338486-202604-15 (In Russian)

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