FR2350000B1 - - Google Patents

Info

Publication number
FR2350000B1
FR2350000B1 FR7712365A FR7712365A FR2350000B1 FR 2350000 B1 FR2350000 B1 FR 2350000B1 FR 7712365 A FR7712365 A FR 7712365A FR 7712365 A FR7712365 A FR 7712365A FR 2350000 B1 FR2350000 B1 FR 2350000B1
Authority
FR
France
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.)
Expired
Application number
FR7712365A
Other languages
French (fr)
Other versions
FR2350000A1 (fr
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.)
Siemens Corp
Original Assignee
Siemens Corp
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 Siemens Corp filed Critical Siemens Corp
Publication of FR2350000A1 publication Critical patent/FR2350000A1/fr
Application granted granted Critical
Publication of FR2350000B1 publication Critical patent/FR2350000B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02858—Means for compensation or elimination of undesirable effects of wave front distortion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
FR7712365A 1976-04-26 1977-04-25 Electrodes de transducteurs pour des filtres ou des lignes a retard fonctionnant suivant le principe des ondes de surface Granted FR2350000A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2618144A DE2618144C3 (de) 1976-04-26 1976-04-26 Wandlerelektroden für Filter oder Verzögerungsleitungen nach dem Oberflächenwellenprinzip

Publications (2)

Publication Number Publication Date
FR2350000A1 FR2350000A1 (fr) 1977-11-25
FR2350000B1 true FR2350000B1 (OSRAM) 1980-01-18

Family

ID=5976236

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7712365A Granted FR2350000A1 (fr) 1976-04-26 1977-04-25 Electrodes de transducteurs pour des filtres ou des lignes a retard fonctionnant suivant le principe des ondes de surface

Country Status (7)

Country Link
US (1) US4158823A (OSRAM)
JP (1) JPS52130551A (OSRAM)
BR (1) BR7702584A (OSRAM)
DE (1) DE2618144C3 (OSRAM)
FR (1) FR2350000A1 (OSRAM)
GB (1) GB1581740A (OSRAM)
IT (1) IT1084934B (OSRAM)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2839851C2 (de) * 1978-09-13 1980-09-25 Siemens Ag, 1000 Berlin Und 8000 Muenchen Oberflächenwellenanordnung mit verbesserter Störsignalunterdrückung
US4205285A (en) 1978-11-03 1980-05-27 Gte Laboratories Incorporated Acoustic surface wave device
US4333065A (en) * 1980-10-09 1982-06-01 Zenith Radio Corporation Low reflectivity apodized surface acoustic transducer with means to prevent wavefront distortion

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1430725A (en) * 1974-08-02 1976-04-07 Mullard Ltd Acoustic surface wave devices

Also Published As

Publication number Publication date
GB1581740A (en) 1980-12-17
JPS52130551A (en) 1977-11-01
DE2618144C3 (de) 1980-11-06
FR2350000A1 (fr) 1977-11-25
DE2618144A1 (de) 1977-11-10
DE2618144B2 (de) 1980-02-28
BR7702584A (pt) 1978-01-10
IT1084934B (it) 1985-05-28
US4158823A (en) 1979-06-19

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Legal Events

Date Code Title Description
ST Notification of lapse