Journal of Radio Electronics. eISSN 1684-1719. 2024. №2
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2024.2.3
STABILIZING REGENERATOR CHARACTERISTICS
A.S. Matsaev
The paper was received October 27, 2023.
Abstract. The article relates to the field of research of the physics of the transition of the amplifier from the aggregate state of amplification to the aggregate state of generation. The aim of the study is to find the possibility of controlling the process of transition from one state of aggregation to another, to implement a stable retention of the device at a given point. The latter will make it possible to implement the construction of stable regenerators. A theoretical conclusion is obtained about the possibility of stable signal regeneration, for which the stabilization coefficient of negative feedback on a constant, zero component should be greater than the regeneration coefficient or gain in gain due to positive feedback at the maximum gain frequency, and for a resonant amplifier – at a resonant frequency. The information confirming the theoretical conclusions and conditions on the example of some technical solutions and implementations of practical devices is given. The multiple technical advantages of stable regenerators over traditional amplifying devices are demonstrated, including resistance to excitation of parasitic generation in a wide dynamic range and temperature range. This is explained by the fact that a stable regenerator cannot be excited twice, a stable excitation is a normal state of aggregation of the regeneration of the input signal. There is also a significant increase in sensitivity and, accordingly, a decrease in intrinsic noise by 9-10 orders of magnitude, an improvement in the width of the linear dynamic range by 8-9 orders of magnitude. An improvement in the amplified frequency bandwidth is demonstrated, not only in the area of minimization, but also in the region of significant expansion, more than an order of magnitude, relative to the maximum achievable for specific samples of the amplifying element, the transistor. The fact that the dependence of the regeneration coefficient and the quality factor of the LC circuit is a special case, only for LC regenerators, is shown and explained. The presented broadband regenerators use strip valves or broadband transformers without an LC circuit and have a regeneration coefficient, which does not contradict the theory and is useful in practice. Multiple improvements are predicted in the construction of systems and devices for low-power signals, as well as an improvement by several orders of magnitude of the main technical characteristics of communication and location systems, measuring systems and devices.
Key words: regeneration, generation, stability, feedback, zero component, operating point drift, thermal noise, shot noise, fluctuation noise.
Corresponding author: Aleksandr Stepanovich Matsaev, deoiks@yandax.ru
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For citation:
Matsaev А.S. Stabilizing regenerator characteristics. // Journal of Radio Electronics. – 2024. – №. 2. https://doi.org/10.30898/1684-1719.2024.2.3 (In Russian)