DE3677241D1 - Akustisches oberflaechenwellenfilter. - Google Patents

Akustisches oberflaechenwellenfilter.

Info

Publication number
DE3677241D1
DE3677241D1 DE8686301334T DE3677241T DE3677241D1 DE 3677241 D1 DE3677241 D1 DE 3677241D1 DE 8686301334 T DE8686301334 T DE 8686301334T DE 3677241 T DE3677241 T DE 3677241T DE 3677241 D1 DE3677241 D1 DE 3677241D1
Authority
DE
Germany
Prior art keywords
wave filter
surface wave
acoustic surface
acoustic
filter
Prior art date
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 - Lifetime
Application number
DE8686301334T
Other languages
English (en)
Inventor
Ltd Nagai
Ltd Sakamoto
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Application granted granted Critical
Publication of DE3677241D1 publication Critical patent/DE3677241D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H03H9/6426—Combinations of the characteristics of different transducers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14544—Transducers of particular shape or position
    • H03H9/1455—Transducers of particular shape or position constituted of N parallel or series transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
DE8686301334T 1985-02-25 1986-02-25 Akustisches oberflaechenwellenfilter. Expired - Lifetime DE3677241D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3599385 1985-02-25

Publications (1)

Publication Number Publication Date
DE3677241D1 true DE3677241D1 (de) 1991-03-07

Family

ID=12457350

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686301334T Expired - Lifetime DE3677241D1 (de) 1985-02-25 1986-02-25 Akustisches oberflaechenwellenfilter.

Country Status (4)

Country Link
US (1) US4649357A (de)
EP (1) EP0196770B1 (de)
JP (1) JPS62115A (de)
DE (1) DE3677241D1 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3529902A1 (de) * 1985-08-21 1987-02-26 Siemens Ag Convolver-anordnung mit akustischen wellen
DE3853513T2 (de) * 1987-11-20 1995-11-23 Oki Electric Ind Co Ltd Akustische Oberflächenwellenanordnung.
US4943782A (en) * 1988-03-21 1990-07-24 Hughes Aircraft Company Four-pass phase conjugate optical amplifier system and method
JPH036913A (ja) * 1989-06-05 1991-01-14 Hitachi Ltd 弾性表面波フィルタ及びそれを用いた移動無線装置
JP2933171B2 (ja) * 1989-09-04 1999-08-09 日本無線株式会社 弾性表面波フィルタ
JP3002485B2 (ja) * 1989-12-20 2000-01-24 株式会社日立製作所 弾性表面波装置
CA2038474C (en) * 1990-03-19 1994-09-20 Yoshio Satoh Surface-acoustic-waver filter having a plurality of electrodes
JPH03293808A (ja) * 1990-04-11 1991-12-25 Fujitsu Ltd 弾性表面波素子の製造方法
JPH053417A (ja) * 1991-04-19 1993-01-08 Oki Electric Ind Co Ltd 弾性表面波フイルタ
US5309126A (en) * 1991-11-18 1994-05-03 Motorola, Inc. Spatially varying multiple electrode acoustic wave filter and method therefor
US5313177A (en) * 1992-04-06 1994-05-17 Motorola, Inc. Method and apparatus for an acoustic wave filter
JP3254779B2 (ja) * 1993-01-05 2002-02-12 株式会社村田製作所 多電極形弾性表面波装置
US5426339A (en) * 1994-04-01 1995-06-20 Rf Monolithics, Inc. Surface acoustic wave devices with mode changing characteristics
DE69636897T2 (de) * 1995-05-29 2007-10-25 Sanyo Electric Co., Ltd., Moriguchi Akustischer Oberflächenwellenfilter
EP0782255B1 (de) * 1995-12-28 2002-03-27 Murata Manufacturing Co., Ltd. Akustisches Oberflächenwellenresonatorfilter mit longitudinaler Kopplung
GB2312110B (en) * 1996-03-29 2000-07-05 Advanced Saw Prod Sa Acoustic wave filter
US6593678B1 (en) * 2000-10-24 2003-07-15 Clarisay, Inc. Surface acoustic wave filter having diminished bandwidth and method of operating the same
EP1489740A3 (de) * 2003-06-18 2006-06-28 Matsushita Electric Industrial Co., Ltd. Elektronisches Bauelement und Verfahren zur Herstellung desselben

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2146541A5 (de) * 1971-07-16 1973-03-02 Thomson Csf
GB1420966A (en) * 1972-12-12 1976-01-14 Standard Telephones Cables Ltd Surface acoustic wave filter devices
JPS5023957A (de) * 1973-07-03 1975-03-14
JPS5561127A (en) * 1978-11-01 1980-05-08 Hitachi Ltd Elastic surface wave device
JPS55158721A (en) * 1979-05-28 1980-12-10 Yasutaka Shimizu Unidirectional converter for elastic surface wave
JPS58154917A (ja) * 1982-03-10 1983-09-14 Hitachi Ltd 弾性表面波バンドパスフイルタ

Also Published As

Publication number Publication date
EP0196770B1 (de) 1991-01-30
JPS62115A (ja) 1987-01-06
US4649357A (en) 1987-03-10
EP0196770A3 (en) 1987-12-09
EP0196770A2 (de) 1986-10-08

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Legal Events

Date Code Title Description
8328 Change in the person/name/address of the agent

Free format text: BETTEN, J., DIPL.-ING. RESCH, M., DIPL.-PHYS., PAT.-ANWAELTE, 8000 MUENCHEN

8364 No opposition during term of opposition