JPS5650613A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS5650613A
JPS5650613A JP12530179A JP12530179A JPS5650613A JP S5650613 A JPS5650613 A JP S5650613A JP 12530179 A JP12530179 A JP 12530179A JP 12530179 A JP12530179 A JP 12530179A JP S5650613 A JPS5650613 A JP S5650613A
Authority
JP
Japan
Prior art keywords
variance
central frequency
film thickness
wave device
surface wave
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
JP12530179A
Other languages
Japanese (ja)
Inventor
Jun Yamada
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 JP12530179A priority Critical patent/JPS5650613A/en
Publication of JPS5650613A publication Critical patent/JPS5650613A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46Filters
    • H03H9/64Filters using surface acoustic waves
    • H03H9/6403Programmable filters
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46Filters
    • H03H9/64Filters using surface acoustic waves
    • H03H9/6423Means for obtaining a particular transfer characteristic
    • H03H9/6433Coupled resonator filters
    • H03H9/6436Coupled resonator filters having one acoustic track only

Landscapes

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

Abstract

PURPOSE:To reduce the variance of the characteristics due to the variance of the film thickness for the elastic surface wave device possessing a resonator and then connecting the variable inductance element in parallel or series to the metal strip to give an adjustment to the central frequency of the band blocking property. CONSTITUTION:The variable inductance element 8 is connected in parallel or series to the metal strip 3 to vary the inductance. As a result, the resonance property of the strip 3 varies, and thus the central frequency of the band blocking property can be adjusted. In this way, the desired central frequency can be obtained even in case when the central frequency may have a variance caused by the variance of the film thickness of the strip 3. As a result, the variance of the characteristics due to the variance of the film thickness can be reduced.
JP12530179A 1979-10-01 1979-10-01 Elastic surface wave device Pending JPS5650613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12530179A JPS5650613A (en) 1979-10-01 1979-10-01 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12530179A JPS5650613A (en) 1979-10-01 1979-10-01 Elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS5650613A true JPS5650613A (en) 1981-05-07

Family

ID=14906689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12530179A Pending JPS5650613A (en) 1979-10-01 1979-10-01 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS5650613A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202511A (en) * 1985-03-06 1986-09-08 Japan Radio Co Ltd Surface acoustic wave filter
JPS6392421U (en) * 1986-12-05 1988-06-15
USRE37375E1 (en) 1991-10-28 2001-09-18 Fujitsu Limited Surface acoustic wave filter
USRE40036E1 (en) 1991-10-28 2008-01-29 Fujitsu Limited Surface acoustic wave filter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202511A (en) * 1985-03-06 1986-09-08 Japan Radio Co Ltd Surface acoustic wave filter
JPS6392421U (en) * 1986-12-05 1988-06-15
JPH0450652Y2 (en) * 1986-12-05 1992-11-30
USRE37375E1 (en) 1991-10-28 2001-09-18 Fujitsu Limited Surface acoustic wave filter
USRE37790E1 (en) 1991-10-28 2002-07-16 Fujitsu Limited Surface acoustic wave filter
USRE40036E1 (en) 1991-10-28 2008-01-29 Fujitsu Limited Surface acoustic wave filter

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