BE851993A - Appareil de filtre tiers d'octave a frequence centrale variable - Google Patents

Appareil de filtre tiers d'octave a frequence centrale variable

Info

Publication number
BE851993A
BE851993A BE175397A BE175397A BE851993A BE 851993 A BE851993 A BE 851993A BE 175397 A BE175397 A BE 175397A BE 175397 A BE175397 A BE 175397A BE 851993 A BE851993 A BE 851993A
Authority
BE
Belgium
Prior art keywords
octave
party
filter unit
frequency filter
central frequency
Prior art date
Application number
BE175397A
Other languages
English (en)
French (fr)
Original Assignee
Electro Acoustique Lab
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 Electro Acoustique Lab filed Critical Electro Acoustique Lab
Publication of BE851993A publication Critical patent/BE851993A/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier
BE175397A 1976-03-02 1977-03-02 Appareil de filtre tiers d'octave a frequence centrale variable BE851993A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7605797A FR2343364A1 (fr) 1976-03-02 1976-03-02 Appareil de filtre tiers d'octave a frequence centrale variable

Publications (1)

Publication Number Publication Date
BE851993A true BE851993A (fr) 1977-07-01

Family

ID=9169815

Family Applications (1)

Application Number Title Priority Date Filing Date
BE175397A BE851993A (fr) 1976-03-02 1977-03-02 Appareil de filtre tiers d'octave a frequence centrale variable

Country Status (4)

Country Link
BE (1) BE851993A (OSRAM)
DE (1) DE2709011A1 (OSRAM)
DK (1) DK90377A (OSRAM)
FR (1) FR2343364A1 (OSRAM)

Also Published As

Publication number Publication date
DE2709011A1 (de) 1977-09-08
FR2343364B1 (OSRAM) 1980-07-04
DK90377A (da) 1977-09-03
FR2343364A1 (fr) 1977-09-30

Similar Documents

Publication Publication Date Title
PL200966A1 (pl) Przetwornik elektro-akustyczny
FR2342616A1 (fr) Circuit d'attaque d'element a cristal
FI773521A7 (fi) Saett och anordning att kontinuerligt framstaella massa av lignocellulosahaltiga fibermaterial
FR2345048A1 (fr) Membrane de transducteur electro-acoustique
AT353506B (de) Piezoelektrischer resonator
FR2351671A1 (fr) Appareil de traitement medical a basse frequence
BR7907884A (pt) Produto fibroso nao-tecido
FR2379941B1 (fr) Resonateur d'ondes de surface acoustiques
DK25879A (da) Kontinuerligt virkende filtersidimentationscentrifuge
FR2428349B1 (fr) Appareil selecteur de frequence
FR2349250A1 (fr) Circuit formant filtre en peigne
BE887846Q (fr) Ensemble de filtres
DK138677A (da) Filteraggregat
SE7704852L (sv) Enkristallfilterenhet
FR2343083A1 (fr) Appareil a nettoyer le ballast
FR2342582A1 (fr) Filtre electromecanique
PL200938A1 (pl) Nici chirurgiczne
BE860362A (fr) Interpolymeres d'acrylonitrile-styrene-indene
BE851993A (fr) Appareil de filtre tiers d'octave a frequence centrale variable
FI790478A7 (fi) Saett foer framstaellning av massa
FR2325060A1 (fr) Filtre chromatique soustractif a diffraction
IT1080558B (it) Trasduttore elettroacustico
BE858891A (fr) Production d'alkylbenzenes
BE854597A (fr) Distributeur du type a membrane extensible
IT1088711B (it) Dispositivo d'impilaggio

Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: LABORATOIRE ELECTRO-ACOUSTIQUE

Effective date: 19840302