SG110996A1 - Acoustic filter with two different channels with compensation for rejection - Google Patents

Acoustic filter with two different channels with compensation for rejection

Info

Publication number
SG110996A1
SG110996A1 SG9903984A SG1999003984A SG110996A1 SG 110996 A1 SG110996 A1 SG 110996A1 SG 9903984 A SG9903984 A SG 9903984A SG 1999003984 A SG1999003984 A SG 1999003984A SG 110996 A1 SG110996 A1 SG 110996A1
Authority
SG
Singapore
Prior art keywords
rejection
compensation
different channels
acoustic filter
acoustic
Prior art date
Application number
SG9903984A
Other languages
English (en)
Inventor
Dufilie Pierre
Chamaly Stephane
Original Assignee
Thomson Csf
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 Thomson Csf filed Critical Thomson Csf
Publication of SG110996A1 publication Critical patent/SG110996A1/en

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
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • 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
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14505—Unidirectional SAW 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
    • H03H9/0023—Balance-unbalance or balance-balance networks
    • H03H9/0028—Balance-unbalance or balance-balance networks using surface acoustic wave devices
    • 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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6493—Side lobe suppression
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/42—Piezoelectric device making

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
SG9903984A 1998-08-21 1999-08-17 Acoustic filter with two different channels with compensation for rejection SG110996A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9810630A FR2782568B1 (fr) 1998-08-21 1998-08-21 Filtre acoustique a deux canaux differents a compensation de rejection

Publications (1)

Publication Number Publication Date
SG110996A1 true SG110996A1 (en) 2005-05-30

Family

ID=9529827

Family Applications (1)

Application Number Title Priority Date Filing Date
SG9903984A SG110996A1 (en) 1998-08-21 1999-08-17 Acoustic filter with two different channels with compensation for rejection

Country Status (9)

Country Link
US (1) US6313717B1 (ko)
EP (1) EP0982859B1 (ko)
JP (1) JP4253939B2 (ko)
KR (1) KR100698818B1 (ko)
CN (1) CN1287517C (ko)
CA (1) CA2280422C (ko)
DE (1) DE69933346T2 (ko)
FR (1) FR2782568B1 (ko)
SG (1) SG110996A1 (ko)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2782568B1 (fr) * 1998-08-21 2001-08-10 Thomson Csf Filtre acoustique a deux canaux differents a compensation de rejection
KR20010072241A (ko) * 1999-06-03 2001-07-31 모리시타 요이찌 탄성 표면파 필터
WO2002001715A1 (fr) * 2000-06-27 2002-01-03 Kabushiki Kaisha Toshiba Dispositif a ondes acoustiques de surface
DE60136042D1 (de) * 2000-09-13 2008-11-20 Matsushita Electric Ind Co Ltd Akustisches Oberflächenwellenfilter und Kommunikationsvorrichtung mit demselben
JP4843862B2 (ja) * 2001-04-05 2011-12-21 株式会社村田製作所 弾性表面波装置
JP4120549B2 (ja) * 2003-01-09 2008-07-16 株式会社村田製作所 弾性表面波フィルタ
SG112100A1 (en) * 2003-11-18 2005-06-29 Fujitsu Media Devices Ltd Surface acoustic device
US9950328B2 (en) * 2016-03-23 2018-04-24 Alfa Laval Corporate Ab Apparatus for dispersing particles in a fluid

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1512790A (en) * 1975-08-22 1978-06-01 Mullard Ltd Acoustic surface wave devices
US5357228A (en) * 1990-02-02 1994-10-18 Thomson-Csf Surface acoustic wave filter having channels which are offset

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3551837A (en) * 1969-08-13 1970-12-29 Us Navy Surface wave transducers with side lobe suppression
US3810257A (en) * 1973-02-01 1974-05-07 Texas Instruments Inc Acoustic surface wave transducer configuration for reducing triple transit signals
US4390854A (en) 1981-03-03 1983-06-28 The United States Of America As Represented By The Secretary Of The Air Force Broad bandwidth surface acoustic wave filter apparatus with staggered tuning
US4609891A (en) * 1985-10-16 1986-09-02 Sperry Corporation Staggered SAW resonator for differential detection
US5521565A (en) * 1988-09-28 1996-05-28 Siemens Aktiengesellschaft Surface wave interdigital transducer and surface wave filter with symmetric or predeterminable asymmetric transfer characteristic between input and output
FR2638047B1 (ko) 1988-10-14 1990-11-23 Thomson Csf
US5264751A (en) 1989-10-20 1993-11-23 Thomson-Csf Unilateral surface wave transducer
FR2661292B1 (fr) 1990-04-24 1995-07-21 Thomson Csf Filtre a ondes de surface et a faibles pertes.
US5296824A (en) * 1991-12-02 1994-03-22 Motorola, Inc. Low loss wide bandwidth parallel channel acoustic filter
FR2695771B1 (fr) 1992-09-15 1994-10-28 Thomson Csf Transducteur d'ondes unidirectionnel.
JP3139225B2 (ja) * 1993-07-08 2001-02-26 株式会社村田製作所 弾性表面波フィルタ
GB2296614B (en) * 1994-12-23 1999-09-15 Advanced Saw Prod Sa Saw filter
FR2762458B1 (fr) 1997-04-18 1999-07-09 Thomson Csf Dispositif a ondes acoustiques de surface a couplage par proximite a entrees/sorties differentielles
FR2782568B1 (fr) * 1998-08-21 2001-08-10 Thomson Csf Filtre acoustique a deux canaux differents a compensation de rejection

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1512790A (en) * 1975-08-22 1978-06-01 Mullard Ltd Acoustic surface wave devices
US5357228A (en) * 1990-02-02 1994-10-18 Thomson-Csf Surface acoustic wave filter having channels which are offset

Also Published As

Publication number Publication date
US6313717B1 (en) 2001-11-06
JP2000077974A (ja) 2000-03-14
EP0982859B1 (fr) 2006-09-27
KR20000017376A (ko) 2000-03-25
DE69933346D1 (de) 2006-11-09
CA2280422A1 (fr) 2000-02-21
KR100698818B1 (ko) 2007-03-23
CN1254964A (zh) 2000-05-31
CA2280422C (fr) 2007-07-17
FR2782568A1 (fr) 2000-02-25
FR2782568B1 (fr) 2001-08-10
DE69933346T2 (de) 2007-08-23
JP4253939B2 (ja) 2009-04-15
EP0982859A1 (fr) 2000-03-01
CN1287517C (zh) 2006-11-29

Similar Documents

Publication Publication Date Title
EP1124144A4 (en) OPTICAL FILTER
GB2344036B (en) Single-sided subband filters
HUP0102953A3 (en) Filter
AU6335299A (en) Filter cartridge arrangement
SG110996A1 (en) Acoustic filter with two different channels with compensation for rejection
GB2347601B (en) Filter
GB2348379B (en) Filter
GB9800654D0 (en) Filter arrangement
GB2339707B (en) Filter assemblies
AU139073S (en) Filter
GB9825489D0 (en) Filter elements
GB9819006D0 (en) Optical filter
GB9800924D0 (en) Filter arrangement
SG78358A1 (en) Filter
GB9811747D0 (en) Filter
GB9824272D0 (en) Filter
GB2357446B (en) Filters
GB2339704B (en) Filter assemblies
TW345028U (en) Structure for simple filter
GB9824245D0 (en) Switchable filter
GB9813257D0 (en) Filter means
GB9814478D0 (en) Frymate filter
GB9822413D0 (en) Rigidised filter consstruction
TW372458U (en) Filter
TW348566U (en) Improvement-type filter