IT1020800B - Dispositivo acustico ad onda super ficiale particolarmente filtro acu stico - Google Patents

Dispositivo acustico ad onda super ficiale particolarmente filtro acu stico

Info

Publication number
IT1020800B
IT1020800B IT69781/74A IT6978174A IT1020800B IT 1020800 B IT1020800 B IT 1020800B IT 69781/74 A IT69781/74 A IT 69781/74A IT 6978174 A IT6978174 A IT 6978174A IT 1020800 B IT1020800 B IT 1020800B
Authority
IT
Italy
Prior art keywords
stic
acu
filter
acoustic device
wave acoustic
Prior art date
Application number
IT69781/74A
Other languages
English (en)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Application granted granted Critical
Publication of IT1020800B publication Critical patent/IT1020800B/it

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
    • H03H9/125—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
    • H03H9/14547—Fan shaped; Tilted; Shifted; Slanted; Tapered; Arched; Stepped finger 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
    • H03H9/02818—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 devices; 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
    • H03H9/14564—Shifted fingers transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
IT69781/74A 1973-09-17 1974-09-13 Dispositivo acustico ad onda super ficiale particolarmente filtro acu stico IT1020800B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4348373A GB1413916A (en) 1973-09-17 1973-09-17 Acoustic surface-wave devices

Publications (1)

Publication Number Publication Date
IT1020800B true IT1020800B (it) 1977-12-30

Family

ID=10428948

Family Applications (1)

Application Number Title Priority Date Filing Date
IT69781/74A IT1020800B (it) 1973-09-17 1974-09-13 Dispositivo acustico ad onda super ficiale particolarmente filtro acu stico

Country Status (9)

Country Link
US (1) US3955159A (it)
JP (1) JPS5057747A (it)
BE (1) BE819969A (it)
DE (1) DE2443608A1 (it)
ES (1) ES430055A1 (it)
FR (1) FR2244302B1 (it)
GB (1) GB1413916A (it)
IT (1) IT1020800B (it)
SE (1) SE392375B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081769A (en) * 1976-09-13 1978-03-28 Texas Instruments Incorporated Acoustic surface wave resonator with suppressed direct coupled response
GB1554366A (en) * 1977-02-04 1979-10-17 Philips Electronic Associated Acoustic surface wave devices
JPS547257A (en) * 1977-06-20 1979-01-19 Hitachi Ltd Elastic surface wave device
SU726648A1 (ru) * 1977-07-22 1980-04-05 Ордена Трудового Красного Знамени Институт Радиотехники И Электроники Ан Ссср Устройство на поверхностных акустических волнах
WO1980002091A1 (en) * 1979-03-21 1980-10-02 Inst Radiotekh Elektron Filter based on the use of surface acoustic waves
GB2090093A (en) * 1980-12-19 1982-06-30 Philips Electronic Associated Acoustic wave devices
US4841470A (en) * 1985-06-25 1989-06-20 Clarion, Co., Ltd. Surface acoustic wave device for differential phase shift keying convolving
DE19638398C2 (de) * 1996-09-19 1999-12-30 Siemens Matsushita Components Oberflächenwellen-Bauelement
US6472987B1 (en) 2000-07-14 2002-10-29 Massachusetts Institute Of Technology Wireless monitoring and identification using spatially inhomogeneous structures
JP4537254B2 (ja) * 2005-04-28 2010-09-01 富士通メディアデバイス株式会社 弾性表面波フィルタおよび分波器
JP4702528B2 (ja) * 2005-05-26 2011-06-15 セイコーエプソン株式会社 弾性表面波素子片、弾性表面波デバイスおよび電子機器
US7595929B1 (en) 2006-05-30 2009-09-29 Crystal Technology, Inc. Grooved backside acoustic termination of acousto-optic devices

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596211A (en) * 1967-11-06 1971-07-27 Zenith Radio Corp Surface-wave filter reflection cancellation
US3559115A (en) * 1968-02-28 1971-01-26 Zenith Radio Corp Surface-wave filter reflection cancellation
US3739290A (en) * 1971-05-05 1973-06-12 Secr Defence Acoustic surface wave devices
US3757256A (en) * 1971-08-02 1973-09-04 Us Navy Surface wave transducers with cancellation of secondary response
US3727718A (en) * 1971-11-24 1973-04-17 Us Navy Surface wave ambiguity analyzer
US3846722A (en) * 1973-04-04 1974-11-05 Westinghouse Electric Corp Surface wave preselector

Also Published As

Publication number Publication date
ES430055A1 (es) 1976-10-16
FR2244302B1 (it) 1978-08-11
SE392375B (sv) 1977-03-21
SE7411541L (it) 1975-03-18
US3955159A (en) 1976-05-04
BE819969A (fr) 1975-03-17
JPS5057747A (it) 1975-05-20
DE2443608A1 (de) 1975-03-20
FR2244302A1 (it) 1975-04-11
GB1413916A (en) 1975-11-12

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