JPS56125106A - Piezoelectric ceramic filter - Google Patents

Piezoelectric ceramic filter

Info

Publication number
JPS56125106A
JPS56125106A JP2850780A JP2850780A JPS56125106A JP S56125106 A JPS56125106 A JP S56125106A JP 2850780 A JP2850780 A JP 2850780A JP 2850780 A JP2850780 A JP 2850780A JP S56125106 A JPS56125106 A JP S56125106A
Authority
JP
Japan
Prior art keywords
filter
piezoelectric ceramic
oscillator
temperature change
temperature
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
JP2850780A
Other languages
Japanese (ja)
Inventor
Takeshi Inoue
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 JP2850780A priority Critical patent/JPS56125106A/en
Priority to US06/233,141 priority patent/US4384229A/en
Publication of JPS56125106A publication Critical patent/JPS56125106A/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
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezo-electric or electrostrictive material
    • H03H9/58—Multiple crystal filters
    • H03H9/581—Multiple crystal filters comprising ceramic piezoelectric layers

Abstract

PURPOSE:To obtain the filter with excellent characteristics, by decreasing the variance of insertion loss due to temperature change, through the series connection of the ceramic capacitor having the dielectric constant with positive temperature constant and made of a material smaller in the temperature coefficient of tandelta to the piezoelectric ceramic oscillator. CONSTITUTION:The piezoelectric ceramic filter of ladder type or Jahmann type circuit is formed by using a thickness-sliding piezoelectric ceramic oscillator 21. The ceramic capacitor 22 made of nonpolarization is connected in series with the ladder type filter oscillator 21, and as the capacitor 22, that has about 10 times the capacitance value as the parallel capacitance of the oscillator 21 and in which the temperature coefficient of dielectric constant is positive and the temperature change of tandelta is smaller, is unsed. Further, the insertion loss of the filter element against the temperature change is reduced, allowig to form the piezoelectric filter with excellent characteristics.
JP2850780A 1980-02-14 1980-03-06 Piezoelectric ceramic filter Pending JPS56125106A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2850780A JPS56125106A (en) 1980-03-06 1980-03-06 Piezoelectric ceramic filter
US06/233,141 US4384229A (en) 1980-02-14 1981-02-10 Temperature compensated piezoelectric ceramic resonator unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2850780A JPS56125106A (en) 1980-03-06 1980-03-06 Piezoelectric ceramic filter

Publications (1)

Publication Number Publication Date
JPS56125106A true JPS56125106A (en) 1981-10-01

Family

ID=12250586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2850780A Pending JPS56125106A (en) 1980-02-14 1980-03-06 Piezoelectric ceramic filter

Country Status (1)

Country Link
JP (1) JPS56125106A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4819569U (en) * 1971-07-15 1973-03-06

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4819569U (en) * 1971-07-15 1973-03-06

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