IT1055686B - Filtro a cristallo monolitico ad elevato grado di selettivita - Google Patents

Filtro a cristallo monolitico ad elevato grado di selettivita

Info

Publication number
IT1055686B
IT1055686B IT69834/75A IT6983475A IT1055686B IT 1055686 B IT1055686 B IT 1055686B IT 69834/75 A IT69834/75 A IT 69834/75A IT 6983475 A IT6983475 A IT 6983475A IT 1055686 B IT1055686 B IT 1055686B
Authority
IT
Italy
Prior art keywords
selectivity
high degree
crystal filter
monolithic crystal
monolithic
Prior art date
Application number
IT69834/75A
Other languages
English (en)
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Application granted granted Critical
Publication of IT1055686B publication Critical patent/IT1055686B/it

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
    • H03H9/58—Multiple crystal filters
    • H03H9/60—Electric coupling means therefor
    • 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

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)
IT69834/75A 1974-11-21 1975-11-17 Filtro a cristallo monolitico ad elevato grado di selettivita IT1055686B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/525,885 US3944951A (en) 1974-11-21 1974-11-21 Monolithic crystal filter

Publications (1)

Publication Number Publication Date
IT1055686B true IT1055686B (it) 1982-01-11

Family

ID=24095003

Family Applications (1)

Application Number Title Priority Date Filing Date
IT69834/75A IT1055686B (it) 1974-11-21 1975-11-17 Filtro a cristallo monolitico ad elevato grado di selettivita

Country Status (14)

Country Link
US (1) US3944951A (it)
JP (1) JPS5174554A (it)
AU (1) AU502009B2 (it)
BE (1) BE835725A (it)
BR (1) BR7507653A (it)
CA (1) CA1044772A (it)
DE (1) DE2552368A1 (it)
ES (1) ES442865A1 (it)
FR (1) FR2292374A1 (it)
GB (1) GB1521725A (it)
IT (1) IT1055686B (it)
MX (1) MX3520E (it)
NL (1) NL7513576A (it)
SE (1) SE410685B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1101945A (en) * 1977-04-15 1981-05-26 Henry K. Yee Single side band monolithic crystal filter
US4246554A (en) * 1978-12-11 1981-01-20 E-Systems, Inc. Inductorless monolithic crystal filter network
JPH0243026U (it) * 1988-09-19 1990-03-26
US5389852A (en) * 1992-11-20 1995-02-14 Toda; Kohji Ultrasonic signal converter
US9083300B2 (en) 2010-09-01 2015-07-14 Qualcomm Mems Technologies, Inc. Electromechanical systems piezoelectric contour mode differential resonators and filters
FI20106063A (fi) * 2010-10-14 2012-06-08 Valtion Teknillinen Akustisesti kytketty laajakaistainen ohutkalvo-BAW-suodatin

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2233199A (en) * 1940-01-02 1941-02-25 Rca Corp Signal detecting system
US2373431A (en) * 1943-03-30 1945-04-10 Bell Telephone Labor Inc Electric wave filter
US2429639A (en) * 1945-06-14 1947-10-28 Bell Telephone Labor Inc Wave filter
FR1268282A (fr) * 1959-10-27 1961-07-28 Clevite Corp élément de circuit piézoélectrique pour filtre d'ondes
US3564463A (en) * 1966-04-11 1971-02-16 Bell Telephone Labor Inc Monolithic piezoelectric filter having mass loaded electrodes for resonation regions acoustically coupled together
US3334307A (en) * 1966-11-14 1967-08-01 Zenith Radio Corp Multi-electrode acoustic amplifier with unitary transducing and translating medium
US3656180A (en) * 1970-08-12 1972-04-11 Bell Telephone Labor Inc Crystal filter
US3739304A (en) * 1971-09-27 1973-06-12 Bell Telephone Labor Inc Resonator interconnections in monolithic crystal filters
DE2231467C3 (de) * 1972-06-27 1975-02-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen Piezoelektrische Anordnung und Verfahren zur Vermeidung von Über Sprechkapazitäten
US3831116A (en) * 1973-04-09 1974-08-20 Raytheon Co Surface acoustic wave filter

Also Published As

Publication number Publication date
CA1044772A (en) 1978-12-19
SE410685B (sv) 1979-10-22
FR2292374A1 (fr) 1976-06-18
US3944951A (en) 1976-03-16
FR2292374B1 (it) 1977-12-16
SE7512592L (sv) 1976-05-24
DE2552368A1 (de) 1976-05-26
BR7507653A (pt) 1976-08-10
MX3520E (es) 1981-01-20
GB1521725A (en) 1978-08-16
AU502009B2 (en) 1979-07-12
NL7513576A (nl) 1976-05-25
ES442865A1 (es) 1977-04-16
BE835725A (fr) 1976-03-16
AU8667475A (en) 1977-05-26
JPS5174554A (it) 1976-06-28

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