NL178928C - Verbetering van een piezo-elektrisch filter met een zeer smalle doorlaatband. - Google Patents

Verbetering van een piezo-elektrisch filter met een zeer smalle doorlaatband.

Info

Publication number
NL178928C
NL178928C NLAANVRAGE7601124,A NL7601124A NL178928C NL 178928 C NL178928 C NL 178928C NL 7601124 A NL7601124 A NL 7601124A NL 178928 C NL178928 C NL 178928C
Authority
NL
Netherlands
Prior art keywords
improvement
narrow band
piezo electric
electric filter
filter
Prior art date
Application number
NLAANVRAGE7601124,A
Other languages
English (en)
Other versions
NL178928B (nl
NL7601124A (nl
Inventor
Jan Adrianus Ing Bezemer
Drs Herman Rudolf Cornel Tromp
Original Assignee
Nederlanden Staat
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 Nederlanden Staat filed Critical Nederlanden Staat
Priority to NLAANVRAGE7601124,A priority Critical patent/NL178928C/nl
Priority to US05/764,400 priority patent/US4127833A/en
Priority to SE7701068A priority patent/SE418441B/xx
Priority to DE2704004A priority patent/DE2704004C2/de
Priority to GB4288/77A priority patent/GB1541397A/en
Priority to FR7703244A priority patent/FR2340647A2/fr
Priority to JP1087077A priority patent/JPS5295140A/ja
Publication of NL7601124A publication Critical patent/NL7601124A/nl
Publication of NL178928B publication Critical patent/NL178928B/nl
Application granted granted Critical
Publication of NL178928C publication Critical patent/NL178928C/nl

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 piezoelectric or electrostrictive material
    • H03H9/56—Monolithic crystal filters
    • 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

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)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
NLAANVRAGE7601124,A 1976-02-04 1976-02-04 Verbetering van een piezo-elektrisch filter met een zeer smalle doorlaatband. NL178928C (nl)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NLAANVRAGE7601124,A NL178928C (nl) 1976-02-04 1976-02-04 Verbetering van een piezo-elektrisch filter met een zeer smalle doorlaatband.
US05/764,400 US4127833A (en) 1976-02-04 1977-01-31 Band pass filter
SE7701068A SE418441B (sv) 1976-02-04 1977-02-01 Filterkedja
DE2704004A DE2704004C2 (de) 1976-02-04 1977-02-01 Semi-monolithisches Filter
GB4288/77A GB1541397A (en) 1976-02-04 1977-02-02 Filter chain
FR7703244A FR2340647A2 (fr) 1976-02-04 1977-02-04 Amelioration d'une chaine de filtrage
JP1087077A JPS5295140A (en) 1976-02-04 1977-02-04 Improvement of filter chain

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7601124,A NL178928C (nl) 1976-02-04 1976-02-04 Verbetering van een piezo-elektrisch filter met een zeer smalle doorlaatband.

Publications (3)

Publication Number Publication Date
NL7601124A NL7601124A (nl) 1977-08-08
NL178928B NL178928B (nl) 1986-01-02
NL178928C true NL178928C (nl) 1986-06-02

Family

ID=19825565

Family Applications (1)

Application Number Title Priority Date Filing Date
NLAANVRAGE7601124,A NL178928C (nl) 1976-02-04 1976-02-04 Verbetering van een piezo-elektrisch filter met een zeer smalle doorlaatband.

Country Status (7)

Country Link
US (1) US4127833A (nl)
JP (1) JPS5295140A (nl)
DE (1) DE2704004C2 (nl)
FR (1) FR2340647A2 (nl)
GB (1) GB1541397A (nl)
NL (1) NL178928C (nl)
SE (1) SE418441B (nl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5578974A (en) * 1995-04-28 1996-11-26 Motorola, Inc. Piezoelectric filter with a curved electrode
JP5072047B2 (ja) * 2007-08-23 2012-11-14 太陽誘電株式会社 弾性波フィルタ、それを用いたデュプレクサおよびそのデュプレクサを用いた通信機
AT509017B1 (de) * 2009-11-02 2012-05-15 Ctp-Dumag Gmbh Brennerdüse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515979A (en) * 1946-11-25 1950-07-18 Bianchi Attilio Wallpaper cutter
US3638146A (en) * 1968-09-25 1972-01-25 Toko Inc Piezoelectric ceramic filter
US4017753A (en) * 1975-02-05 1977-04-12 Kabushiki Kaisha Meidensha Shaped quartz crystal resonator
US3983518A (en) * 1975-04-24 1976-09-28 De Statt Der Nederlanden, Te Dezen Vertegenwoordigd Door De Directeur-Generaal Der Posterijen, Telegrafie En Telefonie Filter chain

Also Published As

Publication number Publication date
SE7701068L (sv) 1977-08-05
FR2340647A2 (fr) 1977-09-02
SE418441B (sv) 1981-05-25
DE2704004C2 (de) 1985-10-24
NL178928B (nl) 1986-01-02
JPS5295140A (en) 1977-08-10
GB1541397A (en) 1979-02-28
JPS6219090B2 (nl) 1987-04-27
DE2704004A1 (de) 1977-08-11
FR2340647B2 (nl) 1980-08-08
US4127833A (en) 1978-11-28
NL7601124A (nl) 1977-08-08

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Legal Events

Date Code Title Description
BC A request for examination has been filed
A85 Still pending on 85-01-01
V2 Lapsed due to non-payment of the last due maintenance fee for the patent application