DK155065C - Krystalfilter - Google Patents

Krystalfilter

Info

Publication number: DK155065C
Authority: DK; Denmark
Prior art keywords: crystal filter; crystal; filter
Prior art date: 1978-12-11

Application number

DK345780A

Other languages

English (en)

Other versions

DK155065B (da

DK345780A (da

Inventor

Thomas W Swanson

Paul A Herzig

Original Assignee

E Systems Inc

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.)

1978-12-11

Filing date

1980-08-11

Publication date

1989-07-03

1980-08-11 Application filed by E Systems Inc filed Critical E Systems Inc

1980-08-11 Publication of DK345780A publication Critical patent/DK345780A/da

1989-01-30 Publication of DK155065B publication Critical patent/DK155065B/da

1989-07-03 Application granted granted Critical

1989-07-03 Publication of DK155065C publication Critical patent/DK155065C/da

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
- H03H9/542—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)

DK345780A 1978-12-11 1980-08-11 Krystalfilter DK155065C (da)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
US96830278		1978-12-11
US05/968,302 US4246554A (en)	1978-12-11	1978-12-11	Inductorless monolithic crystal filter network
US7901046		1979-12-07
PCT/US1979/001046 WO1980001226A1 (en)	1978-12-11	1979-12-07	Inductorless monolithic crystal filter network

Publications (3)

Publication Number	Publication Date
DK345780A DK345780A (da)	1980-08-11
DK155065B DK155065B (da)	1989-01-30
DK155065C true DK155065C (da)	1989-07-03

Family

ID=25514037

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK345780A DK155065C (da)	1978-12-11	1980-08-11	Krystalfilter

Country Status (10)

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

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
US8692629B2 (en) *	2008-05-23	2014-04-08	Cornell University	Generation of high-frequency, high-power electrical signals from low-frequency, low-power lattice network structures as sources
WO2012079038A2 (en)	2010-12-10	2012-06-14	Peregrine Semiconductor Corporation	Method, system, and apparatus for resonator circuits and modulating resonators
US9300038B2 (en)	2010-12-10	2016-03-29	Peregrine Semiconductor Corporation	Method, system, and apparatus for resonator circuits and modulating resonators

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 (da) *	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 (da) *	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

1978
- 1978-12-11 US US05/968,302 patent/US4246554A/en not_active Expired - Lifetime
1979
- 1979-12-07 EP EP80900142A patent/EP0020729B1/en not_active Expired - Lifetime
- 1979-12-07 WO PCT/US1979/001046 patent/WO1980001226A1/en active IP Right Grant
- 1979-12-07 GB GB8023455A patent/GB2048011B/en not_active Expired
- 1979-12-07 JP JP50020979A patent/JPS55501046A/ja active Pending
- 1979-12-11 IT IT51055/79A patent/IT1164777B/it active
- 1979-12-11 CA CA000341661A patent/CA1149477A/en not_active Expired
- 1979-12-11 BE BE0/198506A patent/BE880538A/fr not_active IP Right Cessation
1980
- 1980-08-08 SE SE8005619A patent/SE446681B/sv not_active IP Right Cessation
- 1980-08-11 DK DK345780A patent/DK155065C/da not_active IP Right Cessation

Also Published As

Publication number	Publication date
DK155065B (da)	1989-01-30
EP0020729A4 (en)	1981-05-15
EP0020729A1 (en)	1981-01-07
EP0020729B1 (en)	1990-09-26
JPS55501046A (da)	1980-11-27
SE8005619L (sv)	1980-08-08
SE446681B (sv)	1986-09-29
GB2048011A (en)	1980-12-03
CA1149477A (en)	1983-07-05
BE880538A (fr)	1980-06-11
WO1980001226A1 (en)	1980-06-12
GB2048011B (en)	1983-09-07
US4246554A (en)	1981-01-20
IT1164777B (it)	1987-04-15
DK345780A (da)	1980-08-11
IT7951055A0 (it)	1979-12-11

Publication	Publication Date	Title
IT1116027B (it)	1986-02-10	Filtro
DK149461C (da)	1986-12-08	Roerformet filterelement
DK374379A (da)	1980-03-10	Demonterbart filter
AT376143B (de)	1984-10-10	Filter
SE7712120L (sv)	1978-04-29	Vetskefilter
FI790149A (fi)	1979-09-26	Filtermatta
AT375560B (de)	1984-08-27	Filtriervorrichtung
SE7812682L (sv)	1979-07-06	Filteranordning
DK25879A (da)	1979-07-27	Kontinuerligt virkende filtersidimentationscentrifuge
FI773371A (fi)	1978-05-20	Filter foer tobaksroek
SE7704852L (sv)	1977-10-29	Enkristallfilterenhet
AT365474B (de)	1982-01-25	Filter
AR217544A1 (es)	1980-03-31	Filtro para liquidos
IT1078700B (it)	1985-05-08	Filtro
DK155065C (da)	1989-07-03	Krystalfilter
BR7701150A (pt)	1977-10-18	Filtro electromecanico
FI803409L (fi)	1981-05-14	Filter foer tobaksroek
BR7900733A (pt)	1979-09-04	Filtro ativo
SE7813107L (sv)	1980-06-21	Kristallfilterstruktur
ATA64778A (de)	1980-03-15	Filter
AT365087B (de)	1981-12-10	Filter
IT1125644B (it)	1986-05-14	Filtro meccanico
IT1161368B (it)	1987-03-18	Filtro separatore-desabbiatore
SE7808542L (sv)	1980-02-11	Filter
BR5800837U (pt)	1980-02-26	Filtro

Legal Events

Date	Code	Title	Description
1994-08-22	PBP	Patent lapsed