IT1084935B - Elettrodi di trasduttore per filtri o linee di ritardo che lavorano secondo il principio dell onde superficiali - Google Patents

Elettrodi di trasduttore per filtri o linee di ritardo che lavorano secondo il principio dell onde superficiali

Info

Publication number
IT1084935B
IT1084935B IT22582/77A IT2258277A IT1084935B IT 1084935 B IT1084935 B IT 1084935B IT 22582/77 A IT22582/77 A IT 22582/77A IT 2258277 A IT2258277 A IT 2258277A IT 1084935 B IT1084935 B IT 1084935B
Authority
IT
Italy
Prior art keywords
filters
principle
work according
delay lines
surface waves
Prior art date
Application number
IT22582/77A
Other languages
English (en)
Italian (it)
Original Assignee
Siemens Ag
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 Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of IT1084935B publication Critical patent/IT1084935B/it

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)
IT22582/77A 1976-04-26 1977-04-19 Elettrodi di trasduttore per filtri o linee di ritardo che lavorano secondo il principio dell onde superficiali IT1084935B (it)

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 (1)

Publication Number Publication Date
IT1084935B true IT1084935B (it) 1985-05-28

Family

ID=5976265

Family Applications (1)

Application Number Title Priority Date Filing Date
IT22582/77A IT1084935B (it) 1976-04-26 1977-04-19 Elettrodi di trasduttore per filtri o linee di ritardo che lavorano secondo il principio dell onde superficiali

Country Status (7)

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

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 (Direct) * 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
FR2350001B1 (Direct) 1980-01-18
BR7702585A (pt) 1978-01-10
FR2350001A1 (fr) 1977-11-25
GB1576455A (en) 1980-10-08
US4160219A (en) 1979-07-03

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