JPS5520037A - Multiple mode oscillator - Google Patents

Multiple mode oscillator

Info

Publication number
JPS5520037A
JPS5520037A JP9256078A JP9256078A JPS5520037A JP S5520037 A JPS5520037 A JP S5520037A JP 9256078 A JP9256078 A JP 9256078A JP 9256078 A JP9256078 A JP 9256078A JP S5520037 A JPS5520037 A JP S5520037A
Authority
JP
Japan
Prior art keywords
coarseness
multiple mode
electrodes
mode oscillator
plate
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
JP9256078A
Other languages
Japanese (ja)
Inventor
Takaya Watanabe
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9256078A priority Critical patent/JPS5520037A/en
Publication of JPS5520037A publication Critical patent/JPS5520037A/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 vary the degree of the frequency coupling and thus to increase Q by securing the different coarseness for the surface part of the piezoelectric pole positioned between several pairs of electrodes of the multiple mode oscillator from the coarseness of the surface of other plate face parts. CONSTITUTION:Electrodes 12 and 12' plus 13 and 13' opposing to each other are formed on both surfaces of piezoelectric plate 31 of the multiple mode oscillator which operates in the thickness shear vibration or the thickness vibration, and the coarseness of only the surface of plate face part 32 is finished to the fixed lapping for plate 31 positioned between the two pairs of electrodes. While the surface of other plate face parts excepting part 32 is finished into the mirror surface to secure the different coarseness between part 32 and other parts. Thus the coupling degree of the frequency can be varied thus to increase the value of Q within the band width.
JP9256078A 1978-07-31 1978-07-31 Multiple mode oscillator Pending JPS5520037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9256078A JPS5520037A (en) 1978-07-31 1978-07-31 Multiple mode oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9256078A JPS5520037A (en) 1978-07-31 1978-07-31 Multiple mode oscillator

Publications (1)

Publication Number Publication Date
JPS5520037A true JPS5520037A (en) 1980-02-13

Family

ID=14057799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9256078A Pending JPS5520037A (en) 1978-07-31 1978-07-31 Multiple mode oscillator

Country Status (1)

Country Link
JP (1) JPS5520037A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922422A (en) * 1982-07-28 1984-02-04 Nec Corp Piezoelectric filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922422A (en) * 1982-07-28 1984-02-04 Nec Corp Piezoelectric filter

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