IT1164777B - Rete di filtro a cristallo monolitico senza induttori - Google Patents

Rete di filtro a cristallo monolitico senza induttori

Info

Publication number
IT1164777B
IT1164777B IT51055/79A IT5105579A IT1164777B IT 1164777 B IT1164777 B IT 1164777B IT 51055/79 A IT51055/79 A IT 51055/79A IT 5105579 A IT5105579 A IT 5105579A IT 1164777 B IT1164777 B IT 1164777B
Authority
IT
Italy
Prior art keywords
inductors
filter net
crystal filter
monolithic crystal
monolithic
Prior art date
Application number
IT51055/79A
Other languages
English (en)
Other versions
IT7951055A0 (it
Inventor
Thomas W Swanson
Paul A Herzig
Original Assignee
Thomas W Swanson
Paul A Herzig
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 Thomas W Swanson, Paul A Herzig filed Critical Thomas W Swanson
Publication of IT7951055A0 publication Critical patent/IT7951055A0/it
Application granted granted Critical
Publication of IT1164777B publication Critical patent/IT1164777B/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
    • H03H9/542—Filters comprising resonators of piezoelectric or electrostrictive material including passive elements

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Filters And Equalizers (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
IT51055/79A 1978-12-11 1979-12-11 Rete di filtro a cristallo monolitico senza induttori IT1164777B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/968,302 US4246554A (en) 1978-12-11 1978-12-11 Inductorless monolithic crystal filter network

Publications (2)

Publication Number Publication Date
IT7951055A0 IT7951055A0 (it) 1979-12-11
IT1164777B true IT1164777B (it) 1987-04-15

Family

ID=25514037

Family Applications (1)

Application Number Title Priority Date Filing Date
IT51055/79A IT1164777B (it) 1978-12-11 1979-12-11 Rete di filtro a cristallo monolitico senza induttori

Country Status (10)

Country Link
US (1) US4246554A (it)
EP (1) EP0020729B1 (it)
JP (1) JPS55501046A (it)
BE (1) BE880538A (it)
CA (1) CA1149477A (it)
DK (1) DK155065C (it)
GB (1) GB2048011B (it)
IT (1) IT1164777B (it)
SE (1) SE446681B (it)
WO (1) WO1980001226A1 (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4790914A (en) * 1985-09-30 1988-12-13 The Dow Chemical Company Electrolysis process using concentric tube membrane electrolytic cell
US4784735A (en) * 1986-11-25 1988-11-15 The Dow Chemical Company Concentric tube membrane electrolytic cell with an internal recycle device
US5030934A (en) * 1989-07-05 1991-07-09 Motorola, Inc. Crystal notch filter comprising discrete quartz crystals coupled to a trimmable RC bridging network
JP3040035B2 (ja) * 1992-09-18 2000-05-08 ローム株式会社 中間周波増幅回路を備えた受信機
US20050093652A1 (en) * 2003-10-31 2005-05-05 Qing Ma Size scaling of film bulk acoustic resonator (FBAR) filters using impedance transformer (IT) or balun
WO2009143158A1 (en) * 2008-05-23 2009-11-26 Cornell University Generation of high-frequency, high-power electrical signals from low-frequency, low-power lattice network structures as sources
US9300038B2 (en) 2010-12-10 2016-03-29 Peregrine Semiconductor Corporation Method, system, and apparatus for resonator circuits and modulating resonators
EP3944497A3 (en) * 2010-12-10 2022-03-30 pSemi Corporation A tunable acoustic wave resonator module and method of tuning an acoustic wave filter

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248776A (en) * 1938-07-28 1941-07-08 Bell Telephone Labor Inc Wave filter
NL283486A (it) * 1961-09-22
US3437848A (en) * 1964-09-24 1969-04-08 Telefunken Patent Piezoelectric plate filter
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
US3401275A (en) * 1966-04-14 1968-09-10 Clevite Corp Composite resonator
US3585537A (en) * 1969-02-10 1971-06-15 Bell Telephone Labor Inc Electric wave filters
GB1277614A (en) * 1969-03-07 1972-06-14 Standard Telephones Cables Ltd An electromechanical resonator
BE758421A (fr) * 1969-11-06 1971-05-04 Automatic Elect Lab Filtre passe-bande a cristal polylithique, presentant des frequences polaires d'attenuation dans la bande d'arret inferieure
US3613031A (en) * 1969-12-15 1971-10-12 Hughes Aircraft Co Crystal ladder network having improved passband attenuation characteristic
DE2001433C3 (de) * 1970-01-07 1983-06-01 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Bandpaßfilter
US3704443A (en) * 1970-08-27 1972-11-28 Us Navy Hydrodynamic transducer
US3716808A (en) * 1971-05-20 1973-02-13 Motorola Inc Bandpass filter including monolithic crystal elements with resonating portions selected for symmetrical response
US3704433A (en) * 1971-05-27 1972-11-28 Bell Telephone Labor Inc Band-elimination filter
US3723920A (en) * 1971-06-24 1973-03-27 Gte Automatic Electric Lab Inc Crystal filter assembly
JPS50142141A (it) * 1974-05-07 1975-11-15
US3947784A (en) * 1974-09-19 1976-03-30 Motorola, Inc. Dual-coupled monolithic crystal element for modifying response of filter
US4013982A (en) * 1974-10-22 1977-03-22 International Standard Electric Corporation Piezoelectric crystal unit
US3944951A (en) * 1974-11-21 1976-03-16 Bell Telephone Laboratories, Incorporated Monolithic crystal filter
CA1041186A (en) * 1976-04-28 1978-10-24 Henry K. Yee Monolithic crystal filters
CA1101945A (en) * 1977-04-15 1981-05-26 Henry K. Yee Single side band monolithic crystal filter

Also Published As

Publication number Publication date
EP0020729A4 (en) 1981-05-15
CA1149477A (en) 1983-07-05
EP0020729A1 (en) 1981-01-07
SE8005619L (sv) 1980-08-08
SE446681B (sv) 1986-09-29
US4246554A (en) 1981-01-20
DK345780A (da) 1980-08-11
GB2048011A (en) 1980-12-03
GB2048011B (en) 1983-09-07
BE880538A (fr) 1980-06-11
JPS55501046A (it) 1980-11-27
DK155065B (da) 1989-01-30
EP0020729B1 (en) 1990-09-26
IT7951055A0 (it) 1979-12-11
DK155065C (da) 1989-07-03
WO1980001226A1 (en) 1980-06-12

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19921228