JPS5320840A - Acoustic surface wave device - Google Patents

Acoustic surface wave device

Info

Publication number
JPS5320840A
JPS5320840A JP9490676A JP9490676A JPS5320840A JP S5320840 A JPS5320840 A JP S5320840A JP 9490676 A JP9490676 A JP 9490676A JP 9490676 A JP9490676 A JP 9490676A JP S5320840 A JPS5320840 A JP S5320840A
Authority
JP
Japan
Prior art keywords
wave device
surface wave
acoustic surface
electrode
decrease
Prior art date
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.)
Pending
Application number
JP9490676A
Other languages
Japanese (ja)
Inventor
Yoshihiko Noro
Takeshi Hazama
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9490676A priority Critical patent/JPS5320840A/en
Publication of JPS5320840A publication Critical patent/JPS5320840A/en
Pending 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 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
    • 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
    • H03H9/14552—Transducers of particular shape or position comprising split fingers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To decrease the triple transit echo by using a cross-finger converter composed by mixing a split electrode and a solid electrode.
JP9490676A 1976-08-11 1976-08-11 Acoustic surface wave device Pending JPS5320840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9490676A JPS5320840A (en) 1976-08-11 1976-08-11 Acoustic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9490676A JPS5320840A (en) 1976-08-11 1976-08-11 Acoustic surface wave device

Publications (1)

Publication Number Publication Date
JPS5320840A true JPS5320840A (en) 1978-02-25

Family

ID=14123052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9490676A Pending JPS5320840A (en) 1976-08-11 1976-08-11 Acoustic surface wave device

Country Status (1)

Country Link
JP (1) JPS5320840A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0229897A (en) * 1988-07-20 1990-01-31 Matsushita Electric Ind Co Ltd Vehicle backing preventing device
GR890100593A (en) * 1988-09-28 1990-10-31 Siemens Ag Digital transformer for surface waves and surface waves filter
JPH03194010A (en) * 1989-12-23 1991-08-23 Fuji Plant Kogyo Kk Method and device for preventing illegal parking
US5521565A (en) * 1988-09-28 1996-05-28 Siemens Aktiengesellschaft Surface wave interdigital transducer and surface wave filter with symmetric or predeterminable asymmetric transfer characteristic between input and output
US5729076A (en) * 1992-09-09 1998-03-17 Hitachi, Ltd. Surface acoustic wave device, equipment including the same with electric circuit connected thereto and measuring method of parameters thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0229897A (en) * 1988-07-20 1990-01-31 Matsushita Electric Ind Co Ltd Vehicle backing preventing device
GR890100593A (en) * 1988-09-28 1990-10-31 Siemens Ag Digital transformer for surface waves and surface waves filter
US5521565A (en) * 1988-09-28 1996-05-28 Siemens Aktiengesellschaft Surface wave interdigital transducer and surface wave filter with symmetric or predeterminable asymmetric transfer characteristic between input and output
JPH03194010A (en) * 1989-12-23 1991-08-23 Fuji Plant Kogyo Kk Method and device for preventing illegal parking
US5729076A (en) * 1992-09-09 1998-03-17 Hitachi, Ltd. Surface acoustic wave device, equipment including the same with electric circuit connected thereto and measuring method of parameters thereof

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