Hybrid inductor for improving gain attenuation characteristics of a Pi filter circuit

A filter circuit is required to suppress noise and have high gain attenuation characteristics in a wide band. Gain attenuation decreases because the relative permeability of an inductor core employed in a filter circuit drops sharply as drive frequency increases. Thus, by combining a core with a mag...

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Main Authors: Masato Tanaka, Kazuhiro Shimura, Mitsuhide Sato, Tsutomu Mizuno, Takashi Matsuoka
Format: Article
Language:English
Published: Elsevier 2020-12-01
Series:Energy Reports
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2352484720316413
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author Masato Tanaka
Kazuhiro Shimura
Mitsuhide Sato
Tsutomu Mizuno
Takashi Matsuoka
author_facet Masato Tanaka
Kazuhiro Shimura
Mitsuhide Sato
Tsutomu Mizuno
Takashi Matsuoka
author_sort Masato Tanaka
collection DOAJ
description A filter circuit is required to suppress noise and have high gain attenuation characteristics in a wide band. Gain attenuation decreases because the relative permeability of an inductor core employed in a filter circuit drops sharply as drive frequency increases. Thus, by combining a core with a magnetic composite material with excellent frequency characteristics, we suppressed inductance reduction over a wide frequency range. As a result, the inductance of a hybrid inductor increased by 17.8% and 116% at 1 and 80 MHz, respectively, compared with that of a conventional inductor. When we applied a hybrid inductor to a Pi filter circuit, it was attenuated by 6.5 and 5.0 dB at 100 and 80 MHz, respectively, compared with a conventional inductor.
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spelling doaj.art-5031261cc3e84d04ab6dd32f92d87e8b2022-12-21T23:18:44ZengElsevierEnergy Reports2352-48472020-12-016446451Hybrid inductor for improving gain attenuation characteristics of a Pi filter circuitMasato Tanaka0Kazuhiro Shimura1Mitsuhide Sato2Tsutomu Mizuno3Takashi Matsuoka4Faculty of Engineering Shinshu University, Nagano, 380-8553, JapanFaculty of Engineering Shinshu University, Nagano, 380-8553, JapanFaculty of Engineering Shinshu University, Nagano, 380-8553, Japan; Corresponding author.Faculty of Engineering Shinshu University, Nagano, 380-8553, JapanNippon Chemi-Con Corporation, Kanagawa 213-0012, JapanA filter circuit is required to suppress noise and have high gain attenuation characteristics in a wide band. Gain attenuation decreases because the relative permeability of an inductor core employed in a filter circuit drops sharply as drive frequency increases. Thus, by combining a core with a magnetic composite material with excellent frequency characteristics, we suppressed inductance reduction over a wide frequency range. As a result, the inductance of a hybrid inductor increased by 17.8% and 116% at 1 and 80 MHz, respectively, compared with that of a conventional inductor. When we applied a hybrid inductor to a Pi filter circuit, it was attenuated by 6.5 and 5.0 dB at 100 and 80 MHz, respectively, compared with a conventional inductor.http://www.sciencedirect.com/science/article/pii/S2352484720316413Filter inductorHybrid inductorLow-pass filter circuitFrequency characteristicMagnetic composite material
spellingShingle Masato Tanaka
Kazuhiro Shimura
Mitsuhide Sato
Tsutomu Mizuno
Takashi Matsuoka
Hybrid inductor for improving gain attenuation characteristics of a Pi filter circuit
Energy Reports
Filter inductor
Hybrid inductor
Low-pass filter circuit
Frequency characteristic
Magnetic composite material
title Hybrid inductor for improving gain attenuation characteristics of a Pi filter circuit
title_full Hybrid inductor for improving gain attenuation characteristics of a Pi filter circuit
title_fullStr Hybrid inductor for improving gain attenuation characteristics of a Pi filter circuit
title_full_unstemmed Hybrid inductor for improving gain attenuation characteristics of a Pi filter circuit
title_short Hybrid inductor for improving gain attenuation characteristics of a Pi filter circuit
title_sort hybrid inductor for improving gain attenuation characteristics of a pi filter circuit
topic Filter inductor
Hybrid inductor
Low-pass filter circuit
Frequency characteristic
Magnetic composite material
url http://www.sciencedirect.com/science/article/pii/S2352484720316413
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