BE841218A - Dispositif a ondes elastiques de surface permettant l'elimination des echos a transits multiples - Google Patents

Dispositif a ondes elastiques de surface permettant l'elimination des echos a transits multiples

Info

Publication number
BE841218A
BE841218A BE166514A BE166514A BE841218A BE 841218 A BE841218 A BE 841218A BE 166514 A BE166514 A BE 166514A BE 166514 A BE166514 A BE 166514A BE 841218 A BE841218 A BE 841218A
Authority
BE
Belgium
Prior art keywords
elimination
wave device
elastic wave
device allowing
surface elastic
Prior art date
Application number
BE166514A
Other languages
English (en)
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 BE841218A publication Critical patent/BE841218A/fr

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02874—Means for compensation or elimination of undesirable effects of direct coupling between input and output transducers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02614—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves
    • H03H9/02622—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves of the surface, including back surface
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02842—Means for compensation or elimination of undesirable effects of reflections
    • H03H9/0285—Means for compensation or elimination of undesirable effects of reflections of triple transit echo

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
BE166514A 1975-04-30 1976-04-28 Dispositif a ondes elastiques de surface permettant l'elimination des echos a transits multiples BE841218A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7513619A FR2310029A1 (fr) 1975-04-30 1975-04-30 Dispositif a ondes elastiques de surface permettant l'elimination des echos a transits multiples

Publications (1)

Publication Number Publication Date
BE841218A true BE841218A (fr) 1976-10-28

Family

ID=9154693

Family Applications (1)

Application Number Title Priority Date Filing Date
BE166514A BE841218A (fr) 1975-04-30 1976-04-28 Dispositif a ondes elastiques de surface permettant l'elimination des echos a transits multiples

Country Status (10)

Country Link
US (1) US4025880A (fr)
JP (1) JPS51134547A (fr)
BE (1) BE841218A (fr)
CA (1) CA1070784A (fr)
DE (1) DE2619290A1 (fr)
FR (1) FR2310029A1 (fr)
GB (1) GB1551057A (fr)
PL (1) PL110354B1 (fr)
SU (1) SU652920A3 (fr)
YU (1) YU37249B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2358051A1 (fr) * 1976-07-09 1978-02-03 Thomson Csf Oscillateur a ondes elastiques de surface
JPS55125713A (en) * 1979-03-22 1980-09-27 Toshiba Corp Surface elastic wave device
JPS58154917A (ja) * 1982-03-10 1983-09-14 Hitachi Ltd 弾性表面波バンドパスフイルタ
DE3425555C2 (de) * 1984-07-11 1994-11-17 Clarion Co Ltd SAW-Oberflächenwellenbauelement
DE3517254A1 (de) * 1985-05-13 1986-11-13 Siemens AG, 1000 Berlin und 8000 München Mit akustischen wellen arbeitendes elektrisches filter
JPS6484909A (en) * 1987-09-25 1989-03-30 Nec Corp Surface acoustic wave device
DE4212517C2 (de) * 1992-04-14 1995-02-23 Siemens Ag Oberflächenwellenanordnung mit mindestens zwei in Richtung der Hauptwellenausbreitung benachbarten Oberflächenwellen-Strukturen
US10361676B2 (en) * 2017-09-29 2019-07-23 Qorvo Us, Inc. Baw filter structure with internal electrostatic shielding

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872410A (en) * 1972-12-04 1975-03-18 Gte Laboratories Inc Surface wave filter for tv if stage
US3845420A (en) * 1973-03-02 1974-10-29 Raytheon Co Surface acoustic wave phase control device
US3908137A (en) * 1973-12-26 1975-09-23 Magnavox Co Apparatus and method for triple transit signal cancellation in an acoustical surface wave device
US3868608A (en) * 1974-04-01 1975-02-25 Gte Sylvania Inc Surface wave filter
FR2278200A1 (fr) * 1974-07-12 1976-02-06 Thomson Csf Dispositif electromecanique a ongles elastiques de surface

Also Published As

Publication number Publication date
CA1070784A (fr) 1980-01-29
FR2310029A1 (fr) 1976-11-26
JPS51134547A (en) 1976-11-22
YU37249B (en) 1984-08-31
US4025880A (en) 1977-05-24
PL110354B1 (en) 1980-07-31
FR2310029B1 (fr) 1978-02-24
DE2619290A1 (de) 1976-11-11
SU652920A3 (ru) 1979-03-15
GB1551057A (en) 1979-08-22
YU104576A (en) 1983-04-27

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: THOMSON-CSF

Effective date: 19840428