IT7928193A0 - Struttura di filtro a cristallo o filtro piezoelettrico per l'uso nelle comunicazioni elettriche. - Google Patents

Struttura di filtro a cristallo o filtro piezoelettrico per l'uso nelle comunicazioni elettriche.

Info

Publication number
IT7928193A0
IT7928193A0 IT7928193A IT2819379A IT7928193A0 IT 7928193 A0 IT7928193 A0 IT 7928193A0 IT 7928193 A IT7928193 A IT 7928193A IT 2819379 A IT2819379 A IT 2819379A IT 7928193 A0 IT7928193 A0 IT 7928193A0
Authority
IT
Italy
Prior art keywords
filter
electrical communications
piezoelectric
crystal
filter structure
Prior art date
Application number
IT7928193A
Other languages
English (en)
Inventor
Horst Gunter Augst
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of IT7928193A0 publication Critical patent/IT7928193A0/it

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
    • H03H9/58—Multiple 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)
IT7928193A 1978-12-20 1979-12-19 Struttura di filtro a cristallo o filtro piezoelettrico per l'uso nelle comunicazioni elettriche. IT7928193A0 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7813107A SE415428B (sv) 1978-12-20 1978-12-20 Kristallfilterstruktur

Publications (1)

Publication Number Publication Date
IT7928193A0 true IT7928193A0 (it) 1979-12-19

Family

ID=20336654

Family Applications (1)

Application Number Title Priority Date Filing Date
IT7928193A IT7928193A0 (it) 1978-12-20 1979-12-19 Struttura di filtro a cristallo o filtro piezoelettrico per l'uso nelle comunicazioni elettriche.

Country Status (4)

Country Link
US (1) US4297659A (it)
BR (1) BR7908348A (it)
IT (1) IT7928193A0 (it)
SE (1) SE415428B (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484158A (en) * 1982-07-07 1984-11-20 General Electric Company Monolithic crystal filter and method of manufacturing same
MX2011000055A (es) * 2008-06-30 2011-07-28 Mathena Inc Sistema de contencion de lodo-gas ecologicamente sensible.
US8784545B2 (en) 2011-04-12 2014-07-22 Mathena, Inc. Shale-gas separating and cleanout system
US9353586B2 (en) 2012-05-11 2016-05-31 Mathena, Inc. Control panel, and digital display units and sensors therefor
USD719519S1 (en) 2013-03-08 2014-12-16 Mathena, Inc. Drive over cable cover segment
USD714175S1 (en) 2013-05-03 2014-09-30 Mathena, Inc. Portion of digital gauge
USD714174S1 (en) 2013-05-03 2014-09-30 Mathena, Inc. Portion of digital gauge
USD763414S1 (en) 2013-12-10 2016-08-09 Mathena, Inc. Fluid line drive-over

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209178A (en) * 1965-09-28 Fig.ii
GB1153673A (en) * 1967-01-18 1969-05-29 Mullard Ltd Improvements in or relating to Electrical Discharge Display Devices
US3723920A (en) * 1971-06-24 1973-03-27 Gte Automatic Electric Lab Inc Crystal filter assembly

Also Published As

Publication number Publication date
BR7908348A (pt) 1980-09-16
SE7813107L (sv) 1980-06-21
SE415428B (sv) 1980-09-29
US4297659A (en) 1981-10-27

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