BE814977A - Filtre passe-bande a frequence centrale reglable electroniquement - Google Patents

Filtre passe-bande a frequence centrale reglable electroniquement

Info

Publication number
BE814977A
BE814977A BE2053616A BE2053616A BE814977A BE 814977 A BE814977 A BE 814977A BE 2053616 A BE2053616 A BE 2053616A BE 2053616 A BE2053616 A BE 2053616A BE 814977 A BE814977 A BE 814977A
Authority
BE
Belgium
Prior art keywords
bandpass filter
central frequency
frequency bandpass
electronically adjustable
adjustable central
Prior art date
Application number
BE2053616A
Other languages
English (en)
French (fr)
Inventor
C H Petitjean
M E L Marchand
M Denis
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 filed Critical
Publication of BE814977A publication Critical patent/BE814977A/xx

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
    • H03H7/0123—Frequency selective two-port networks comprising distributed impedance elements together with lumped impedance elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
BE2053616A 1973-05-18 1974-05-14 Filtre passe-bande a frequence centrale reglable electroniquement BE814977A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7318092A FR2230121B1 (en:Method) 1973-05-18 1973-05-18

Publications (1)

Publication Number Publication Date
BE814977A true BE814977A (fr) 1974-11-14

Family

ID=9119551

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2053616A BE814977A (fr) 1973-05-18 1974-05-14 Filtre passe-bande a frequence centrale reglable electroniquement

Country Status (7)

Country Link
US (1) US3889214A (en:Method)
JP (1) JPS5539923B2 (en:Method)
BE (1) BE814977A (en:Method)
DE (1) DE2422991A1 (en:Method)
FR (1) FR2230121B1 (en:Method)
GB (1) GB1467677A (en:Method)
IT (1) IT1012437B (en:Method)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051449A (en) * 1976-10-12 1977-09-27 The United States Of America As Represented By The Secretary Of The Army Time frequency diversity system
US4502029A (en) * 1983-02-17 1985-02-26 International Telephone And Telegraph Corporation Extended resonator electronically tunable band pass filter
DE3330828A1 (de) * 1983-08-26 1985-03-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Uebertragungs-netzwerk
US4551696A (en) * 1983-12-16 1985-11-05 Motorola, Inc. Narrow bandwidth microstrip filter
FR2565438B1 (fr) * 1984-05-30 1989-09-22 Cepe Filtre dielectrique a frequence centrale variable.
FR2574230A1 (fr) * 1984-12-03 1986-06-06 Int Standard Electric Corp Filtre passe-bande, condensateur y inclus et arrangement pour en faire varier la capacite
FR2574229A1 (fr) * 1984-12-03 1986-06-06 Int Standard Electric Corp Filtre passe-bande a bande etroite a accord electronique
US4835499A (en) * 1988-03-09 1989-05-30 Motorola, Inc. Voltage tunable bandpass filter
EP0406962A3 (en) * 1989-07-07 1991-04-17 N.V. Philips' Gloeilampenfabrieken A filter
FI87854C (fi) * 1991-04-12 1993-02-25 Lk Products Oy Foerfarande foer att tillverka ett hoegfrekvensfilter samt hoegfrekvensfilter tillverkat enligt foerfarandet
US5406234A (en) * 1992-12-30 1995-04-11 Itt Corporation Tunable microwave filter apparatus having a notch resonator
FR2714217B1 (fr) * 1993-12-17 1996-01-26 Thomson Csf Filtre hyperfréquence à résonateurs couplés accordés par des capacités variables, à structure triplaque et à agilité de fréquence.
EP2387095B1 (en) 2010-05-12 2016-12-14 Hittite Microwave LLC Combline filter
US9123983B1 (en) 2012-07-20 2015-09-01 Hittite Microwave Corporation Tunable bandpass filter integrated circuit
US10298196B2 (en) * 2015-07-28 2019-05-21 Qorvo Us, Inc. RF filtering circuitry

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348173A (en) * 1964-05-20 1967-10-17 George L Matthaei Interdigital filters with capacitively loaded resonators
US3391356A (en) * 1964-06-30 1968-07-02 Bolljahn Harriette Strip-line filter
US3539953A (en) * 1967-07-27 1970-11-10 Western Microwave Lab Inc Magnetically tunable comb line bandpass filter
US3649937A (en) * 1970-03-23 1972-03-14 Rca Corp Electronically tuned ultra high frequency television tuner

Also Published As

Publication number Publication date
GB1467677A (en) 1977-03-16
AU6899374A (en) 1975-11-20
FR2230121A1 (en:Method) 1974-12-13
IT1012437B (it) 1977-03-10
JPS5539923B2 (en:Method) 1980-10-15
DE2422991A1 (de) 1974-12-05
FR2230121B1 (en:Method) 1978-02-10
US3889214A (en) 1975-06-10
JPS5042767A (en:Method) 1975-04-18

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