WO2020125341A1 - Unité de filtre ayant un inducteur de couplage, un filtre et un dispositif électronique - Google Patents

Unité de filtre ayant un inducteur de couplage, un filtre et un dispositif électronique Download PDF

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Publication number
WO2020125341A1
WO2020125341A1 PCT/CN2019/120978 CN2019120978W WO2020125341A1 WO 2020125341 A1 WO2020125341 A1 WO 2020125341A1 CN 2019120978 W CN2019120978 W CN 2019120978W WO 2020125341 A1 WO2020125341 A1 WO 2020125341A1
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WO
WIPO (PCT)
Prior art keywords
resonator
filter unit
parallel
filter
capacitive device
Prior art date
Application number
PCT/CN2019/120978
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English (en)
Chinese (zh)
Inventor
庞慰
蔡华林
Original Assignee
天津大学
诺思(天津)微系统有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 天津大学, 诺思(天津)微系统有限责任公司 filed Critical 天津大学
Publication of WO2020125341A1 publication Critical patent/WO2020125341A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0014—Capacitor filters, i.e. capacitors whose parasitic inductance is of relevance to consider it as filter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0021—Constructional details
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0092—Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter

Definitions

  • the first inductance and the second inductance realize coupling mutual inductance in a mutual inductance manner of discrete devices.
  • FIG. 13 exemplarily shows simulation results of a filter using the filter unit in FIG. 8 in which high bandwidth is realized
  • the inductance value of LL1 is greater than the original L1.
  • the effect of L1+M can be obtained by using the inductance value of L1, so the winding size of the inductor can be reduced.
  • FIG. 3 is a schematic diagram of a filter unit according to an exemplary embodiment of the present invention.
  • the resonance of the inductance and the capacitance generates resonance points in and out of the band.
  • the resonator itself is a capacitor.
  • the capacitor can also be removed according to the bandwidth and suppression of the filter, and the structure of Fig. 3 is adopted. Specifically, The difference between Fig. 3 and Fig. 2a is that the capacitors C1 and C2 in Fig. 2a are removed.
  • FIG. 7 is a schematic diagram of a filter unit according to an exemplary embodiment of the present invention, and is also a modified embodiment of FIG. 2a.
  • it is single-ended to single-ended.
  • it is from single-ended to differential.
  • the middle of the inductor L2 is a virtual ground, and the signal is coupled through mutual inductance.
  • the upper and lower ends of the inductor L2 form a differential signal to achieve a single-ended to differential conversion.
  • the structure in FIG. 7 can also reversely convert from differential to single-ended.
  • FIG. 14 exemplarily shows simulation results of a filter using the filter unit in FIG. 3, in which high bandwidth and high roll-off are realized.
  • FIG. 15 is a schematic diagram illustrating the introduction of resonators to improve roll-off and out-of-band suppression.
  • the frequency of the resonator is high, and the impedance of the resonator has a rapid change from low to high near the resonance frequency.
  • the high impedance has little effect on the in-band, and the low impedance forms the zero point of signal transmission. Because the impedance changes quickly, the transmission curve has a faster roll-off.
  • an out-of-band stop band with a certain bandwidth can be formed.

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  • Filters And Equalizers (AREA)

Abstract

La présente invention concerne une unité de filtre LC, comprenant : une première partie de filtrage comprenant un premier inducteur et un premier dispositif capacitif qui sont connectés en parallèle ; et une seconde partie de filtrage comprenant un second inducteur et un second dispositif capacitif qui sont connectés en parallèle, le premier inducteur et le second inducteur étant appropriés pour un couplage pour former un inducteur de couplage ; le premier dispositif capacitif et le second dispositif capacitif peuvent être un résonateur ; une fréquence Fs du résonateur est à l'extérieur d'une bande passante de l'unité de filtre, et une fréquence Fp du résonateur se situe dans la bande passante ; et le résonateur peut être un résonateur FBAR. La présente invention concerne en outre un filtre ayant l'unité de filtre, et un dispositif électronique avec l'unité de filtre ou le filtre.
PCT/CN2019/120978 2018-12-18 2019-11-26 Unité de filtre ayant un inducteur de couplage, un filtre et un dispositif électronique WO2020125341A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811551311.1A CN111342789B (zh) 2018-12-18 2018-12-18 带耦合电感的滤波器单元、滤波器及电子设备
CN201811551311.1 2018-12-18

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WO2020125341A1 true WO2020125341A1 (fr) 2020-06-25

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CN (1) CN111342789B (fr)
WO (1) WO2020125341A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113225039A (zh) * 2021-04-25 2021-08-06 哈尔滨工程大学 基于拓扑绝缘体的鲁棒性谐振器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113037239A (zh) * 2021-02-23 2021-06-25 安徽安努奇科技有限公司 滤波器和电子设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1239846A (zh) * 1998-06-18 1999-12-29 财团法人工业技术研究院 微型化多层陶瓷滤波器
JP2006310895A (ja) * 2004-10-13 2006-11-09 Qiankun Kagi Kofun Yugenkoshi フィルター回路、バンドパス・フィルターおよびフィルター回路の製造方法
CN104333339A (zh) * 2014-11-07 2015-02-04 王少夫 一种可调变压器
CN104682910A (zh) * 2015-03-10 2015-06-03 中国科学院微电子研究所 一种互感耦合滤波器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003298482A1 (en) * 2003-01-20 2004-08-13 Koninklijke Philips Electronics N.V. Resonator filter structure having equal resonance frequencies
US7671706B2 (en) * 2006-04-14 2010-03-02 Murata Manufacturing Co., Ltd High frequency multilayer bandpass filter
DE102013104842B4 (de) * 2013-05-10 2015-11-12 Epcos Ag Zur Miniaturisierung geeignetes HF-Bauelement mit verringerter Kopplung
US9847769B2 (en) * 2015-09-25 2017-12-19 Qorvo Us, Inc. Tunable compensation circuit for filter circuitry using acoustic resonators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1239846A (zh) * 1998-06-18 1999-12-29 财团法人工业技术研究院 微型化多层陶瓷滤波器
JP2006310895A (ja) * 2004-10-13 2006-11-09 Qiankun Kagi Kofun Yugenkoshi フィルター回路、バンドパス・フィルターおよびフィルター回路の製造方法
CN104333339A (zh) * 2014-11-07 2015-02-04 王少夫 一种可调变压器
CN104682910A (zh) * 2015-03-10 2015-06-03 中国科学院微电子研究所 一种互感耦合滤波器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113225039A (zh) * 2021-04-25 2021-08-06 哈尔滨工程大学 基于拓扑绝缘体的鲁棒性谐振器

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CN111342789A (zh) 2020-06-26
CN111342789B (zh) 2024-01-26

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