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JPS57116409A - Monolithic filter - Google Patents

Monolithic filter

Info

Publication number
JPS57116409A
JPS57116409A JP202881A JP202881A JPS57116409A JP S57116409 A JPS57116409 A JP S57116409A JP 202881 A JP202881 A JP 202881A JP 202881 A JP202881 A JP 202881A JP S57116409 A JPS57116409 A JP S57116409A
Authority
JP
Japan
Prior art keywords
resonators
electrode
auxiliary electrode
resonator
energy
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
JP202881A
Other languages
Japanese (ja)
Inventor
Masaki Kobayashi
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP202881A priority Critical patent/JPS57116409A/en
Publication of JPS57116409A publication Critical patent/JPS57116409A/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
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/56—Monolithic crystal filters
    • H03H9/562—Monolithic crystal filters comprising a ceramic piezoelectric layer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

PURPOSE:To obtain superior stability while obtaining an extremely precise attenuation electrode, by providing an auxiliary electrode between energy-confined type resonators on an input and an output side, and by selecting the size of this auxiliary electrode adequately. CONSTITUTION:Energy-confined resonators 6 and 6 are formed on a piezoelectric substrate 5; one resonator 6 is connected to signal input terminals 1 and 2, and the other resonator 6 is connected to signal output terminals 3 and 4. Further, an auxiliary electrode 8 is provided between both the resonators 6 and 6, and the depth length k1W of the substrate 5 of this electrode 8 is less than the length W of the resonators 6 in the same direction. Consequently, an attenuation electrode is realized only by the propagation operation of an elastic oscillating wave with extremely high precision. Further, its stability is superior because no electric element is used.
JP202881A 1981-01-12 1981-01-12 Monolithic filter Pending JPS57116409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP202881A JPS57116409A (en) 1981-01-12 1981-01-12 Monolithic filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP202881A JPS57116409A (en) 1981-01-12 1981-01-12 Monolithic filter

Publications (1)

Publication Number Publication Date
JPS57116409A true JPS57116409A (en) 1982-07-20

Family

ID=11517871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP202881A Pending JPS57116409A (en) 1981-01-12 1981-01-12 Monolithic filter

Country Status (1)

Country Link
JP (1) JPS57116409A (en)

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