JPS5475971A - Surface elastic wave device - Google Patents

Surface elastic wave device

Info

Publication number
JPS5475971A
JPS5475971A JP14273177A JP14273177A JPS5475971A JP S5475971 A JPS5475971 A JP S5475971A JP 14273177 A JP14273177 A JP 14273177A JP 14273177 A JP14273177 A JP 14273177A JP S5475971 A JPS5475971 A JP S5475971A
Authority
JP
Japan
Prior art keywords
idtr
output
substrate
deltaf
input
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.)
Granted
Application number
JP14273177A
Other languages
Japanese (ja)
Other versions
JPS5832528B2 (en
Inventor
Akitsuna Yuhara
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 JP52142731A priority Critical patent/JPS5832528B2/en
Publication of JPS5475971A publication Critical patent/JPS5475971A/en
Publication of JPS5832528B2 publication Critical patent/JPS5832528B2/en
Expired 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

Landscapes

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

Abstract

PURPOSE:To obtain a high-precision peak frequency characteristic by providing a bonding pad in the position which has the same distance from a pair of inter- digital transducers LDTR connected in parallel to each other by a wiring electrode on a piezo-electric substrate. CONSTITUTION:At one edge of piezo-electric substrate 13, input IDTR 14 is provided, and terminals 11 and 11' are provided through bonding pads PPAD21 and 21' for input. At the other edge of substrate 13, output LDTR 15 and 16 are provided, and are connected to terminals 12 and 12' through PPAD22 and 22' for output in middle position x/2 of distance x between IDTR 15 and 16. Shield electrode 19 is provided between input IDTR 14 and output IDTR 15. For the purpose of realizing prescribed frequency interval DELTAf, x is set to satisfy x=vs/DELTAf when the surface elastic wave speed of substrate 13 is denoted as vs. Then, electric signals from IDTR 15 and 16 reach PPAD22 with the same delay time and attenuation quantity because output PPAD 22 and 22' are set to x/2, so that influences of the delay time on frequency interval DELTAf can be ignored.
JP52142731A 1977-11-30 1977-11-30 surface acoustic wave device Expired JPS5832528B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52142731A JPS5832528B2 (en) 1977-11-30 1977-11-30 surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52142731A JPS5832528B2 (en) 1977-11-30 1977-11-30 surface acoustic wave device

Publications (2)

Publication Number Publication Date
JPS5475971A true JPS5475971A (en) 1979-06-18
JPS5832528B2 JPS5832528B2 (en) 1983-07-13

Family

ID=15322260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52142731A Expired JPS5832528B2 (en) 1977-11-30 1977-11-30 surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS5832528B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5210652A (en) * 1975-07-16 1977-01-27 Toshiba Corp Elastic surface wave device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5210652A (en) * 1975-07-16 1977-01-27 Toshiba Corp Elastic surface wave device

Also Published As

Publication number Publication date
JPS5832528B2 (en) 1983-07-13

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