JPS5763918A - Surface acoustic wave devce - Google Patents

Surface acoustic wave devce

Info

Publication number
JPS5763918A
JPS5763918A JP13881480A JP13881480A JPS5763918A JP S5763918 A JPS5763918 A JP S5763918A JP 13881480 A JP13881480 A JP 13881480A JP 13881480 A JP13881480 A JP 13881480A JP S5763918 A JPS5763918 A JP S5763918A
Authority
JP
Japan
Prior art keywords
acoustic wave
surface acoustic
electrodes
filter
channel filter
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
JP13881480A
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 JP13881480A priority Critical patent/JPS5763918A/en
Publication of JPS5763918A publication Critical patent/JPS5763918A/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
    • H03H9/70—Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
    • H03H9/72—Networks using surface acoustic waves

Landscapes

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

Abstract

PURPOSE:To reduce size without exerting any influence on characteristics by reducing the propagation speed of a surface acoustic wave at a voice channel filter or the part of the filter and a color channel filter in comparison with that at another filter part. CONSTITUTION:On a piezoelectric substrate 1, a video channel filter consists of electrodes 101 and 102, a color channel filter of electrodes 11 and 12, and a voice channel filter of electrodes 11, and 13. The voice and color channel filters have narrow bands, so electrode size is very large. For this purpose, a film of a material, such as zinc oxide, reducing the propagation speed of a surface acoustic wave is formed at the part of a substrate 14 where the electrodes 11-13 are to be formed. As a result, the surface acoustic wave speed at the part 14 becomes less than that at the substrate 1, reducing the electrode size. Consequently, the size of a surface acoustic wave device for a separate carrier system is reduced without influencing its characteristics.
JP13881480A 1980-10-06 1980-10-06 Surface acoustic wave devce Pending JPS5763918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13881480A JPS5763918A (en) 1980-10-06 1980-10-06 Surface acoustic wave devce

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13881480A JPS5763918A (en) 1980-10-06 1980-10-06 Surface acoustic wave devce

Publications (1)

Publication Number Publication Date
JPS5763918A true JPS5763918A (en) 1982-04-17

Family

ID=15230860

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13881480A Pending JPS5763918A (en) 1980-10-06 1980-10-06 Surface acoustic wave devce

Country Status (1)

Country Link
JP (1) JPS5763918A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0583077A (en) * 1991-09-24 1993-04-02 Mitsubishi Electric Corp Surface acoustic wave circuit device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0583077A (en) * 1991-09-24 1993-04-02 Mitsubishi Electric Corp Surface acoustic wave circuit device

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