FR2418574B1 - Dispositif mettant a profit des ondes acoustiques - Google Patents

Dispositif mettant a profit des ondes acoustiques

Info

Publication number: FR2418574B1
Authority: FR; France
Prior art keywords: acoustic waves; acoustic; waves
Prior art date: 1978-02-23
Legal status (The legal status 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 status listed.): Expired

Application number

FR7904404A

Other languages

English (en)

Other versions

FR2418574A1 (fr

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Koninklijke Philips NV

Original Assignee

Philips Gloeilampenfabrieken NV

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.)

1978-02-23

Filing date

1979-02-21

Publication date

1987-11-13

1979-02-21 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1979-09-21 Publication of FR2418574A1 publication Critical patent/FR2418574A1/fr

1987-11-13 Application granted granted Critical

1987-11-13 Publication of FR2418574B1 publication Critical patent/FR2418574B1/fr

Status Expired legal-status Critical Current

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
- H03H9/64—Filters using surface acoustic waves
- H03H9/6423—Means for obtaining a particular transfer characteristic
- H03H9/6433—Coupled resonator filters

Landscapes

Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

FR7904404A 1978-02-23 1979-02-21 Dispositif mettant a profit des ondes acoustiques Expired FR2418574B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB726378		1978-02-23

Publications (2)

Publication Number	Publication Date
FR2418574A1 FR2418574A1 (fr)	1979-09-21
FR2418574B1 true FR2418574B1 (fr)	1987-11-13

Family

ID=9829752

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR7904404A Expired FR2418574B1 (fr)	1978-02-23	1979-02-21	Dispositif mettant a profit des ondes acoustiques

Country Status (8)

Country	Link
US (1)	US4247836A (fr)
JP (1)	JPS5948565B2 (fr)
BE (1)	BE874349A (fr)
CA (1)	CA1132211A (fr)
DE (1)	DE2906893A1 (fr)
FR (1)	FR2418574B1 (fr)
GB (1)	GB2018079B (fr)
SE (1)	SE429488B (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2117992B (en) *	1982-03-24	1985-09-18	Philips Electronic Associated	Parallel-series acoustic wave device arrangement
US4609891A (en) *	1985-10-16	1986-09-02	Sperry Corporation	Staggered SAW resonator for differential detection
EP0316836B1 (fr) *	1987-11-20	1995-04-05	Oki Electric Industry Company, Limited	Dispositif à ondes acoustiques de surface
JPH03293808A (ja) *	1990-04-11	1991-12-25	Fujitsu Ltd	弾性表面波素子の製造方法
US5296824A (en) *	1991-12-02	1994-03-22	Motorola, Inc.	Low loss wide bandwidth parallel channel acoustic filter
DE4214122C2 (de) *	1992-04-29	2001-02-22	Siemens Ag	Zweispur-Oberflächenwellenanordnung mit verbesserter Selektionseigenschaft
JPH05315886A (ja) *	1992-05-14	1993-11-26	Matsushita Electric Ind Co Ltd	弾性表面波フィルタ
USD434512S (en)	1997-11-17	2000-11-28	John Manufacturing Limited	Rechargeable emergency light
JP3963862B2 (ja)	2003-05-20	2007-08-22	富士通メディアデバイス株式会社	弾性表面波フィルタ及びそれを有する分波器
WO2009025057A1 (fr) *	2007-08-23	2009-02-26	Fujitsu Limited	Filtre de branchement, module comprenant le filtre de branchement, dispositif de communication
JP5177589B2 (ja) *	2008-12-26	2013-04-03	太陽誘電株式会社	分波器および電子装置
JP5183459B2 (ja) *	2008-12-26	2013-04-17	太陽誘電株式会社	分波器、分波器用基板および電子装置
WO2015191719A1 (fr)	2014-06-10	2015-12-17	Massachusetts Institute Of Technology	Résonateurs mems couplés non libérés et filtres de transmission
CN111010142B (zh) *	2019-12-17	2023-03-10	成都频岢微电子有限公司	一种环形无反射栅低插损声表滤波器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3810257A (en) *	1973-02-01	1974-05-07	Texas Instruments Inc	Acoustic surface wave transducer configuration for reducing triple transit signals
GB1451326A (en) *	1973-02-16	1976-09-29	Nat Res Dev	Acoustic wave devices
DE2312057A1 (de) *	1973-03-10	1974-09-12	Philips Patentverwaltung	Akustisches oberflaechenwellenkammsperrfilter
US3886504A (en) *	1974-05-20	1975-05-27	Texas Instruments Inc	Acoustic surface wave resonator devices
FR2274171A1 (fr) *	1974-06-10	1976-01-02	Philips Nv	Filtre mettant a profit des ondes de surface acoustiques

1979
- 1979-02-15 CA CA321,704A patent/CA1132211A/fr not_active Expired
- 1979-02-20 SE SE7901465A patent/SE429488B/sv not_active IP Right Cessation
- 1979-02-21 FR FR7904404A patent/FR2418574B1/fr not_active Expired
- 1979-02-21 BE BE0/193613A patent/BE874349A/fr not_active IP Right Cessation
- 1979-02-22 DE DE19792906893 patent/DE2906893A1/de not_active Withdrawn
- 1979-02-22 US US06/013,951 patent/US4247836A/en not_active Expired - Lifetime
- 1979-02-23 JP JP54020630A patent/JPS5948565B2/ja not_active Expired
- 1979-03-06 GB GB7907897A patent/GB2018079B/en not_active Expired

Also Published As

Publication number	Publication date
JPS5948565B2 (ja)	1984-11-27
BE874349A (fr)	1979-08-21
GB2018079A (en)	1979-10-10
FR2418574A1 (fr)	1979-09-21
CA1132211A (fr)	1982-09-21
SE7901465L (sv)	1979-08-24
DE2906893A1 (de)	1979-08-30
GB2018079B (en)	1982-08-18
US4247836A (en)	1981-01-27
JPS54123892A (en)	1979-09-26
SE429488B (sv)	1983-09-05

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Legal Events

Date	Code	Title	Description
1987-12-24	ST	Notification of lapse