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JPS57150213A - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
JPS57150213A
JPS57150213A JP3518381A JP3518381A JPS57150213A JP S57150213 A JPS57150213 A JP S57150213A JP 3518381 A JP3518381 A JP 3518381A JP 3518381 A JP3518381 A JP 3518381A JP S57150213 A JPS57150213 A JP S57150213A
Authority
JP
Japan
Prior art keywords
output electrode
electrode
input electrode
cross width
denoted
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
JP3518381A
Other languages
Japanese (ja)
Inventor
Kazuhisa Yabukawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3518381A priority Critical patent/JPS57150213A/en
Publication of JPS57150213A publication Critical patent/JPS57150213A/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 elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02543—Characteristics of substrate, e.g. cutting angles
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves

Landscapes

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

Abstract

PURPOSE:To make a device small-sized without deteriorating its characteristic, by constituting so that the maximum cross width ratio of an output electrode and an input electrode for sound is made smaller than that for video IF. CONSTITUTION:An input electrode and an output electrode 12, 13 of a surface wave filter for video intermediate frequency, an input electrode and an output electrode 14, 15 of a surface wave filter for sound intermediate frequency, and acoustic absorption layers 16, 17 are formed on a piezoelectric substrate 11. In this state, they are constituted so that relation of A'/A>B''/B is obtained, when each maximum cross width of each input electrode 12, 14 is denoted as A, B, and the cross width of each output electrode 13, 15 is denoted as A', B''. Such a constitution scarcely exerts influence on the characteristic, and also the shape of the output electrode of a voice filter becomes small, therefore, this device is made small-sized by that portion.
JP3518381A 1981-03-13 1981-03-13 Surface acoustic wave device Pending JPS57150213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3518381A JPS57150213A (en) 1981-03-13 1981-03-13 Surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3518381A JPS57150213A (en) 1981-03-13 1981-03-13 Surface acoustic wave device

Publications (1)

Publication Number Publication Date
JPS57150213A true JPS57150213A (en) 1982-09-17

Family

ID=12434726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3518381A Pending JPS57150213A (en) 1981-03-13 1981-03-13 Surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS57150213A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5422745A (en) * 1977-07-22 1979-02-20 Hitachi Ltd Elastic surface wave filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5422745A (en) * 1977-07-22 1979-02-20 Hitachi Ltd Elastic surface wave filter

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