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JPS5662416A - Constituting method of ladder type ceramic filter - Google Patents

Constituting method of ladder type ceramic filter

Info

Publication number
JPS5662416A
JPS5662416A JP13826979A JP13826979A JPS5662416A JP S5662416 A JPS5662416 A JP S5662416A JP 13826979 A JP13826979 A JP 13826979A JP 13826979 A JP13826979 A JP 13826979A JP S5662416 A JPS5662416 A JP S5662416A
Authority
JP
Japan
Prior art keywords
type
filter
ceramic filter
cascade connection
series
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
JP13826979A
Other languages
Japanese (ja)
Inventor
Tetsuo Yoshida
Shigeo Ozawa
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.)
Tokin Corp
Original Assignee
Tohoku Metal Industries 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 Tohoku Metal Industries Ltd filed Critical Tohoku Metal Industries Ltd
Priority to JP13826979A priority Critical patent/JPS5662416A/en
Publication of JPS5662416A publication Critical patent/JPS5662416A/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
    • H03H9/02—Details
    • H03H9/05—Holders; Supports
    • H03H9/10—Mounting in enclosures
    • H03H9/1007—Mounting in enclosures for bulk acoustic wave [BAW] devices
    • H03H9/1014—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device
    • H03H9/1028—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device the BAW device being held between spring terminals
    • 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 piezoelectric or electrostrictive material
    • H03H9/58—Multiple crystal filters
    • H03H9/60—Electric coupling means therefor
    • H03H9/605—Electric coupling means therefor consisting of a ladder configuration

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

PURPOSE:To obtain a ceramic filter small in size, low in cost and high in reliability, by cascade connection of basic filters consisting of series and parallel resonators so that series resonators and parallel resonators are alternately connected. CONSTITUTION:A two-element constitution L type filter is composed of a series resonator A consisting of a rectangular plate shape piezoelectric oscillators and a parallel resonator D consisting of square plate shape piezoelectric oscillators. The terminals 12 of the L type filter are in cascade connection by matching the image impedance to constitute a T type three-element filter. The terminals 11 of L type filters are in cascade connection by matching the image impedance to constitute a (pi) type 3-element filter.
JP13826979A 1979-10-27 1979-10-27 Constituting method of ladder type ceramic filter Pending JPS5662416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13826979A JPS5662416A (en) 1979-10-27 1979-10-27 Constituting method of ladder type ceramic filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13826979A JPS5662416A (en) 1979-10-27 1979-10-27 Constituting method of ladder type ceramic filter

Publications (1)

Publication Number Publication Date
JPS5662416A true JPS5662416A (en) 1981-05-28

Family

ID=15217970

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13826979A Pending JPS5662416A (en) 1979-10-27 1979-10-27 Constituting method of ladder type ceramic filter

Country Status (1)

Country Link
JP (1) JPS5662416A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62227207A (en) * 1986-03-28 1987-10-06 Tdk Corp Phase shift element
US5543763A (en) * 1992-09-07 1996-08-06 Murata Manufacturing Co., Ltd. Piezoelectric component for ladder type filter and method of manufacturing thereof
US5914646A (en) * 1994-03-16 1999-06-22 Fujitsu Limited Surface acoustic wave filter with larger driving electrode areas in some parallel resonators, and packaging thereof
US5986522A (en) * 1995-01-19 1999-11-16 Matsushita Electric Industrial Co., Ltd. Piezoelectric filter of the ladder type
USRE37375E1 (en) 1991-10-28 2001-09-18 Fujitsu Limited Surface acoustic wave filter
USRE40036E1 (en) 1991-10-28 2008-01-29 Fujitsu Limited Surface acoustic wave filter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62227207A (en) * 1986-03-28 1987-10-06 Tdk Corp Phase shift element
USRE37375E1 (en) 1991-10-28 2001-09-18 Fujitsu Limited Surface acoustic wave filter
USRE37790E1 (en) 1991-10-28 2002-07-16 Fujitsu Limited Surface acoustic wave filter
USRE40036E1 (en) 1991-10-28 2008-01-29 Fujitsu Limited Surface acoustic wave filter
US5543763A (en) * 1992-09-07 1996-08-06 Murata Manufacturing Co., Ltd. Piezoelectric component for ladder type filter and method of manufacturing thereof
US5914646A (en) * 1994-03-16 1999-06-22 Fujitsu Limited Surface acoustic wave filter with larger driving electrode areas in some parallel resonators, and packaging thereof
US5986522A (en) * 1995-01-19 1999-11-16 Matsushita Electric Industrial Co., Ltd. Piezoelectric filter of the ladder type
US6150903A (en) * 1995-01-19 2000-11-21 Matsushita Electric Industrtial Co., Ltd. Piezoelectric filter, its manufacturing method, and intermediate frequency filter

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