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Снижение Ð²Ð½Ð¾ÑÐ¸Ð¼Ñ‹Ñ Ð¿Ð¾Ñ‚ÐµÑ€ÑŒ в Ñ„Ð¸Ð»ÑŒÑ‚Ñ€Ð°Ñ Ð½Ð° основе Ñ‚Ñ€Ð°Ð½ÑÐºÐ¾Ð½Ð´ÑƒÐºÑ‚Ð¸Ð²Ð½Ñ‹Ñ ÑƒÑÐ¸Ð»Ð¸Ñ‚ÐµÐ»ÐµÐ¹

выпускная квалификационная работа бакалавра

Снижение Ð²Ð½Ð¾ÑÐ¸Ð¼Ñ‹Ñ Ð¿Ð¾Ñ‚ÐµÑ€ÑŒ в Ñ„Ð¸Ð»ÑŒÑ‚Ñ€Ð°Ñ Ð½Ð° основе Ñ‚Ñ€Ð°Ð½ÑÐºÐ¾Ð½Ð´ÑƒÐºÑ‚Ð¸Ð²Ð½Ñ‹Ñ ÑƒÑÐ¸Ð»Ð¸Ñ‚ÐµÐ»ÐµÐ¹

Abstract

Данная работа посвящена поиску и исследованию методов снижения вносимых потерь в Gm-C фильтрах. Из представленного обзора литературы по данной тематике можно сделать вывод, что основными источниками вносимых потерь в Gm-C фильтрах являются RLC прототип и ТУ. Для снижения потерь ТУ должен обладать достаточно высоким выходным сопротивлением. Увеличить выходное сопротивление ТУ предлагается двумя способами: путем использования каскодной схемы в выходном каскаде ТУ и размещением отрицательного сопротивления параллельно выходу ТУ. Потери присущие RLC прототипу предлагается снижать путем увеличения значения первого ТУ при использовании балансной схемы. Также в данной работе представлены результаты моделирования схем Gm-C ФНЧ 3-го порядка с двумя емкостями и двумя индуктивностями. При моделирования данных схем на идеальных элементах получены значения вносимых потерь в – 6 дБ. Также был рассмотрен метод снижения вносимых потерь, основанный на увеличении выходного сопротивления ТУ. Исходя из полученных результатов, увеличение выходного сопротивления ТУ до 1 МОм позволяет снизить вносимые потери до уровня в – 6 дБ, что является оптимальным результатом.

This work is devoted to the search and study of methods to reduce the insertion loss in Gm-C filters. From the presented review of the literature on this topic, we can conclude that the main sources of insertion loss in Gm-C filters are the RLC prototype and technical specifications. To reduce losses, the TA must have a sufficiently high output resistance. It is proposed to increase the output resistance of the TA in two ways: by using a cascode circuit in the output stage of the TA and placing a negative resistance parallel to the output of the TA. Losses inherent in the RLC prototype are proposed to be reduced by increasing the value of the first TA when using a balanced circuit. This paper also presents the results of modeling the Gm-C low-pass filter of the 3rd order with two capacitors and two inductors. When simulating these circuits on ideal elements, the insertion loss values of - 6 dB were obtained. Also considered was the method of reducing the insertion loss based on increasing the output resistance of the TA. Based on the results obtained, an increase in the output resistance of the TA to 1 MΩ allows the insertion loss to be reduced to a level of - 6 dB, which is the optimal result.

Keywords

амплитудно-частотная Ñ Ð°Ñ€Ð°ÐºÑ‚ÐµÑ€Ð¸ÑÑ‚Ð¸ÐºÐ°, gm-c filters, output resistance, транскондуктивные усилители, иммитаторы, фильтры Ð½Ð¸Ð¶Ð½Ð¸Ñ Ñ‡Ð°ÑÑ‚Ð¾Ñ‚, introduced losses, Ð²Ñ‹Ñ Ð¾Ð´Ð½Ð¾Ðµ сопротивление, вносимые потери, rlc prototype, low frequency filters, amplitude-frequency characteristics, transconductive amplifiers, rlc прототип, immitators, gm-c фильтры

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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