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JPS5797715A - Lc filter - Google Patents

Lc filter

Info

Publication number
JPS5797715A
JPS5797715A JP17437280A JP17437280A JPS5797715A JP S5797715 A JPS5797715 A JP S5797715A JP 17437280 A JP17437280 A JP 17437280A JP 17437280 A JP17437280 A JP 17437280A JP S5797715 A JPS5797715 A JP S5797715A
Authority
JP
Japan
Prior art keywords
capacity
hpf
capacities
lpf
coils
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP17437280A
Other languages
Japanese (ja)
Inventor
Hajime Okamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP17437280A priority Critical patent/JPS5797715A/en
Publication of JPS5797715A publication Critical patent/JPS5797715A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1758—Series LC in shunt or branch path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/075—Ladder networks, e.g. electric wave filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1716—Comprising foot-point elements
    • H03H7/1725—Element to ground being common to different shunt paths, i.e. Y-structure
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1775—Parallel LC in shunt or branch path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1791—Combined LC in shunt or branch path

Landscapes

  • Filters And Equalizers (AREA)

Abstract

PURPOSE:To obtain good impedance matching characteristics throughout a transmission band, by cascading a simple LPF to an HPF to prevent the degradation of the caracteristics in respect to realization of a high-pass filter (HPF) of the LC constitution. CONSTITUTION:In the HPF part surrounded by the dotted line, when the characteristics are determined, values of capacities C1-C7 and coils L1-L5 are determined. Next, when the LPF part indicated by the line broken by one dot is designed, the value of the capacity is determind in view of values of floating capacities (known in respective coils) C1S. C2S, C3S, C4S and C5S of coils L1- L5. That is, if the total capacity of floating capacities C1S-C5S is not sufficient to obtain the desired characteristics of the low-pass filter (LPF), the capacity corresponding to this deficiency is added actually. If the total capacity of floating capacities is sufficient to obtain the desired characteristics, a capacity Co is not added actually.
JP17437280A 1980-12-10 1980-12-10 Lc filter Pending JPS5797715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17437280A JPS5797715A (en) 1980-12-10 1980-12-10 Lc filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17437280A JPS5797715A (en) 1980-12-10 1980-12-10 Lc filter

Publications (1)

Publication Number Publication Date
JPS5797715A true JPS5797715A (en) 1982-06-17

Family

ID=15977455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17437280A Pending JPS5797715A (en) 1980-12-10 1980-12-10 Lc filter

Country Status (1)

Country Link
JP (1) JPS5797715A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600904A (en) * 1984-06-28 1986-07-15 Motorola, Inc. Broken loop switched capacitor high pass filter
US4849721A (en) * 1985-04-26 1989-07-18 Sharp Kabushiki Kaisha Bandpass filter for a CATV converter
US6335663B1 (en) * 1998-03-17 2002-01-01 Matsushita Electric Industrial Co., Ltd. Multiplexer/branching filter
US6438394B1 (en) * 1994-10-14 2002-08-20 Conductus, Inc. Frequency dependent inductor apparatus and method for a narrow-band filter
US6529750B1 (en) 1998-04-03 2003-03-04 Conductus, Inc. Microstrip filter cross-coupling control apparatus and method
US7317364B2 (en) 2000-08-07 2008-01-08 Conductus, Inc. Varactor tuning for a narrow band filter including an automatically controlled tuning system
US7437187B1 (en) 2000-10-30 2008-10-14 Conductus, Inc. Superconductive filter with capacitive patches providing reduced cross-coupling
US7610072B2 (en) 2003-09-18 2009-10-27 Superconductor Technologies, Inc. Superconductive stripline filter utilizing one or more inter-resonator coupling members
FR2996385A1 (en) * 2012-09-28 2014-04-04 St Microelectronics Sa PASSIVE FILTER

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600904A (en) * 1984-06-28 1986-07-15 Motorola, Inc. Broken loop switched capacitor high pass filter
US4849721A (en) * 1985-04-26 1989-07-18 Sharp Kabushiki Kaisha Bandpass filter for a CATV converter
US6438394B1 (en) * 1994-10-14 2002-08-20 Conductus, Inc. Frequency dependent inductor apparatus and method for a narrow-band filter
US6335663B1 (en) * 1998-03-17 2002-01-01 Matsushita Electric Industrial Co., Ltd. Multiplexer/branching filter
US6529750B1 (en) 1998-04-03 2003-03-04 Conductus, Inc. Microstrip filter cross-coupling control apparatus and method
US7317364B2 (en) 2000-08-07 2008-01-08 Conductus, Inc. Varactor tuning for a narrow band filter including an automatically controlled tuning system
US7738933B2 (en) 2000-08-07 2010-06-15 Conductus, Inc. Varactor tuning for a narrow band filter having shunt capacitors with different capacitance values
US7437187B1 (en) 2000-10-30 2008-10-14 Conductus, Inc. Superconductive filter with capacitive patches providing reduced cross-coupling
US7610072B2 (en) 2003-09-18 2009-10-27 Superconductor Technologies, Inc. Superconductive stripline filter utilizing one or more inter-resonator coupling members
FR2996385A1 (en) * 2012-09-28 2014-04-04 St Microelectronics Sa PASSIVE FILTER
US9257956B2 (en) 2012-09-28 2016-02-09 Stmicroelectronics Sa Passive filter

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