FR2350001B1 - - Google Patents

Info

Publication number
FR2350001B1
FR2350001B1 FR7712366A FR7712366A FR2350001B1 FR 2350001 B1 FR2350001 B1 FR 2350001B1 FR 7712366 A FR7712366 A FR 7712366A FR 7712366 A FR7712366 A FR 7712366A FR 2350001 B1 FR2350001 B1 FR 2350001B1
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
FR7712366A
Other languages
French (fr)
Other versions
FR2350001A1 (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 FR2350001A1 publication Critical patent/FR2350001A1/fr
Application granted granted Critical
Publication of FR2350001B1 publication Critical patent/FR2350001B1/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
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14544—Transducers of particular shape or position
    • H03H9/1455—Transducers of particular shape or position constituted of N parallel or series transducers
    • 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)
FR7712366A 1976-04-26 1977-04-25 Electrodes de transducteurs pour des filtres ou des lignes a retard, fonctionnant selon le principe des ondes de surface Granted FR2350001A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2618210A DE2618210C3 (de) 1976-04-26 1976-04-26 Wandlerelektroden für Filter oder Verzögerungsleitungen nach dem Oberflächenwellenprinzip

Publications (2)

Publication Number Publication Date
FR2350001A1 FR2350001A1 (fr) 1977-11-25
FR2350001B1 true FR2350001B1 (enExample) 1980-01-18

Family

ID=5976265

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7712366A Granted FR2350001A1 (fr) 1976-04-26 1977-04-25 Electrodes de transducteurs pour des filtres ou des lignes a retard, fonctionnant selon le principe des ondes de surface

Country Status (7)

Country Link
US (1) US4160219A (enExample)
JP (1) JPS52130550A (enExample)
BR (1) BR7702585A (enExample)
DE (1) DE2618210C3 (enExample)
FR (1) FR2350001A1 (enExample)
GB (1) GB1576455A (enExample)
IT (1) IT1084935B (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847090B2 (ja) * 1977-08-10 1983-10-20 株式会社村田製作所 弾性表面波フイルタ
FR2428350A1 (fr) * 1978-06-06 1980-01-04 Thomson Csf Filtre a ondes elastiques de surface et etage de frequence intermediaire d'un recepteur de television comprenant un tel filtre
US4604595A (en) * 1982-06-16 1986-08-05 Murata Manufacturing Co., Ltd. Surface acoustic wave device having interdigitated comb electrodes weighted for odd/even response
USRE33957E (en) * 1982-07-26 1992-06-09 Toyo Communication Equipment Co., Ltd. High frequency narrow-band multi-mode filter
GB2132844A (en) * 1982-12-22 1984-07-11 Philips Electronic Associated Surface acoustic wave device
US4535265A (en) * 1984-05-17 1985-08-13 Kabushiki Kaisha Toshiba Surface acoustic wave transducer with internal acoustic reflection
US4918349A (en) * 1987-11-13 1990-04-17 Hitachi, Ltd. Surface acoustic wave device having apodized transducer provided with irregular pitch electrode group
JPH02189015A (ja) * 1989-01-17 1990-07-25 Clarion Co Ltd 弾性表面波装置
JPH0685597A (ja) * 1992-09-02 1994-03-25 Mitsubishi Electric Corp 弾性表面波装置
US6791236B1 (en) * 2000-10-11 2004-09-14 Yuri Abramov Method utilizing the saw velocity dispersion effect for weighting by shaping the electrode fingers of a saw interdigital transducer and apparatus produced thereby
DE102010055628B4 (de) 2010-12-22 2018-09-06 Snaptrack, Inc. Elektroakustischer Resonator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2040881A5 (enExample) * 1969-04-16 1971-01-22 Thomson Csf
GB1355418A (en) * 1971-05-24 1974-06-05 Mullard Ltd Acoustic surface wave devices
GB1430725A (en) * 1974-08-02 1976-04-07 Mullard Ltd Acoustic surface wave devices

Also Published As

Publication number Publication date
DE2618210B2 (de) 1979-07-12
DE2618210A1 (de) 1977-11-10
JPS52130550A (en) 1977-11-01
DE2618210C3 (de) 1980-03-13
BR7702585A (pt) 1978-01-10
FR2350001A1 (fr) 1977-11-25
GB1576455A (en) 1980-10-08
US4160219A (en) 1979-07-03
IT1084935B (it) 1985-05-28

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Legal Events

Date Code Title Description
ST Notification of lapse