GB2280809B - Ladder-type electric filter device - Google Patents

Ladder-type electric filter device

Info

Publication number
GB2280809B
GB2280809B GB9420299A GB9420299A GB2280809B GB 2280809 B GB2280809 B GB 2280809B GB 9420299 A GB9420299 A GB 9420299A GB 9420299 A GB9420299 A GB 9420299A GB 2280809 B GB2280809 B GB 2280809B
Authority
GB
United Kingdom
Prior art keywords
ladder
filter device
type electric
electric filter
type
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.)
Expired - Fee Related
Application number
GB9420299A
Other versions
GB2280809A (en
GB9420299D0 (en
Inventor
Tatsuo Ogawa
Isao Shimizu
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.)
Nippon Telegraph and Telephone Corp
Niterra Co Ltd
Original Assignee
NGK Spark Plug Co Ltd
Nippon Telegraph and Telephone Corp
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
Priority claimed from JP1991033539U external-priority patent/JP2509276Y2/en
Priority claimed from JP1991033540U external-priority patent/JP2567662Y2/en
Application filed by NGK Spark Plug Co Ltd, Nippon Telegraph and Telephone Corp filed Critical NGK Spark Plug Co Ltd
Priority claimed from GB9207999A external-priority patent/GB2254972B/en
Publication of GB9420299D0 publication Critical patent/GB9420299D0/en
Publication of GB2280809A publication Critical patent/GB2280809A/en
Application granted granted Critical
Publication of GB2280809B publication Critical patent/GB2280809B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
GB9420299A 1991-04-12 1992-04-10 Ladder-type electric filter device Expired - Fee Related GB2280809B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1991033539U JP2509276Y2 (en) 1991-04-12 1991-04-12 Ladder type electric filter
JP1991033540U JP2567662Y2 (en) 1991-04-12 1991-04-12 Ladder type electric filter
GB9207999A GB2254972B (en) 1991-04-12 1992-04-10 Ladder-type electric filter device

Publications (3)

Publication Number Publication Date
GB9420299D0 GB9420299D0 (en) 1994-11-23
GB2280809A GB2280809A (en) 1995-02-08
GB2280809B true GB2280809B (en) 1995-05-03

Family

ID=27266137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9420299A Expired - Fee Related GB2280809B (en) 1991-04-12 1992-04-10 Ladder-type electric filter device

Country Status (1)

Country Link
GB (1) GB2280809B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1084244A (en) * 1996-07-18 1998-03-31 Murata Mfg Co Ltd Piezoelectric resonator and electronic component using it
JPH10126203A (en) * 1996-08-27 1998-05-15 Murata Mfg Co Ltd Piezoelectric resonator and electronic component using it

Also Published As

Publication number Publication date
GB2280809A (en) 1995-02-08
GB9420299D0 (en) 1994-11-23

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030410