JPS5787228A - Monolithic filter - Google Patents

Monolithic filter

Info

Publication number
JPS5787228A
JPS5787228A JP16135580A JP16135580A JPS5787228A JP S5787228 A JPS5787228 A JP S5787228A JP 16135580 A JP16135580 A JP 16135580A JP 16135580 A JP16135580 A JP 16135580A JP S5787228 A JPS5787228 A JP S5787228A
Authority
JP
Japan
Prior art keywords
resonators
substrate
shutting
symmetry
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
JP16135580A
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 JP16135580A priority Critical patent/JPS5787228A/en
Publication of JPS5787228A publication Critical patent/JPS5787228A/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

Landscapes

  • Chemical & Material Sciences (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 improve the symmetry of the attenuation quantity in the stop band, by providing two energy shutting resonators on a piezo-electric substrate and by providing an auxiliary resonator between them. CONSTITUTION:Two energy shutting resonators 6 and 6 in the input side and the output side are provided on a piezoelectric substrate 5, and signal input terminal 1 and 2 and signal output terminals 3 and 4 are connected to respective resonators 6. Auxiliary resonators 8 and 8' are provided between resonators 6 and 6 oppositely to both faces of the substrate 5. A width (b) of resonators 8 and 8' is determined by a thickness H of the substrate 5, resonance frequencies of resonators 6 and 6, and frequency lowering quantities of resonators 8 and 8'. Thus, the symmetry of the attenuation quantity in the stop band is improved, and merits of the monolithic filter are utilized effectively because this improvement is realized by one piezoelectric substrate.
JP16135580A 1980-11-18 1980-11-18 Monolithic filter Pending JPS5787228A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16135580A JPS5787228A (en) 1980-11-18 1980-11-18 Monolithic filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16135580A JPS5787228A (en) 1980-11-18 1980-11-18 Monolithic filter

Publications (1)

Publication Number Publication Date
JPS5787228A true JPS5787228A (en) 1982-05-31

Family

ID=15733496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16135580A Pending JPS5787228A (en) 1980-11-18 1980-11-18 Monolithic filter

Country Status (1)

Country Link
JP (1) JPS5787228A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02261212A (en) * 1989-03-31 1990-10-24 Nippon Dempa Kogyo Co Ltd Multiple mode type piezo-oscillator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4842651A (en) * 1971-09-27 1973-06-21
JPS4942651A (en) * 1972-08-25 1974-04-22

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4842651A (en) * 1971-09-27 1973-06-21
JPS4942651A (en) * 1972-08-25 1974-04-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02261212A (en) * 1989-03-31 1990-10-24 Nippon Dempa Kogyo Co Ltd Multiple mode type piezo-oscillator

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