GR890100592A - Φιλτρο επιφανειακων κυματων. - Google Patents
Φιλτρο επιφανειακων κυματων.Info
- Publication number
- GR890100592A GR890100592A GR890100592A GR890100592A GR890100592A GR 890100592 A GR890100592 A GR 890100592A GR 890100592 A GR890100592 A GR 890100592A GR 890100592 A GR890100592 A GR 890100592A GR 890100592 A GR890100592 A GR 890100592A
- Authority
- GR
- Greece
- Prior art keywords
- surface waves
- filter
- waves filter
- transformers
- traces
- Prior art date
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
- H03H9/6489—Compensation of undesirable effects
- H03H9/6496—Reducing ripple in transfer characteristic
-
- 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
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02842—Means for compensation or elimination of undesirable effects of reflections
- H03H9/0285—Means for compensation or elimination of undesirable effects of reflections of triple transit echo
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Coils Or Transformers For Communication (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Φίλτρο επιφανειακών κυμάτων κατά το είδος ενός φίλτρου χαμηλών απωλειών με δύο ίχνη (2, 3) σε μετασχηματιστές ζεύξης (43, 53), όπου για την εξάλειψη σημάτων διπλής μετάδοσης διαθέτει επ' αλλήλων συντονισμένες αποστάσεις (d1 έως d4) των μετασχηματιστών (41 έως 43, 42 έως 43...) επ' αλλήλων. ω
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3832943A DE3832943A1 (de) | 1988-09-28 | 1988-09-28 | Oberflaechenwellenfilter |
Publications (1)
Publication Number | Publication Date |
---|---|
GR890100592A true GR890100592A (el) | 1990-10-31 |
Family
ID=6363895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GR890100592A GR890100592A (el) | 1988-09-28 | 1989-09-20 | Φιλτρο επιφανειακων κυματων. |
Country Status (9)
Country | Link |
---|---|
US (1) | US5128640A (el) |
EP (1) | EP0436556B1 (el) |
JP (1) | JPH03502866A (el) |
DE (2) | DE3832943A1 (el) |
DK (1) | DK46491D0 (el) |
ES (1) | ES2015482A6 (el) |
GR (1) | GR890100592A (el) |
PT (1) | PT91820B (el) |
WO (1) | WO1990003690A1 (el) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4018784A1 (de) * | 1990-06-12 | 1991-12-19 | Siemens Ag | Oberflaechenwellen-reflektorfilter |
EP0508325A1 (de) * | 1991-04-11 | 1992-10-14 | SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG | Reflektive Verzögerungsleitung in Oberflächenwellentechnik |
US5313177A (en) * | 1992-04-06 | 1994-05-17 | Motorola, Inc. | Method and apparatus for an acoustic wave filter |
GB2288937B (en) * | 1994-04-25 | 1998-06-10 | Advanced Saw Prod Sa | SAW filter |
US5646584A (en) * | 1994-04-25 | 1997-07-08 | Advanced Saw Products Sa | Saw filter including electrodes of opposing polarity |
DE4419722C1 (de) * | 1994-06-06 | 1996-02-22 | Siemens Ag | Mit akustischen Oberflächenwellen arbeitendes Filter |
WO2000033461A1 (en) * | 1998-12-03 | 2000-06-08 | Cts Corporation | Low ripple hybrid surface acoustic wave filter apparatus for improved signal-to-noise ratio |
DE10026074B4 (de) * | 2000-05-25 | 2010-02-18 | Epcos Ag | Rekursives OFW-Filter mit geringer Chiplänge |
KR20120014591A (ko) * | 2009-05-18 | 2012-02-17 | 노우레스 일렉트로닉스, 엘엘시 | 감소된 진동 감도를 갖는 마이크로폰 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4044321A (en) * | 1976-03-01 | 1977-08-23 | Rockwell International Corporation | Surface acoustic wave band pass filtering |
US4468642A (en) * | 1981-06-05 | 1984-08-28 | Hitachi, Ltd. | Band pass filter device |
JPS60150312A (ja) * | 1984-01-18 | 1985-08-08 | Toshiba Corp | 弾性表面波フイルタ |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4254387A (en) * | 1977-10-06 | 1981-03-03 | U.S. Philips Corporation | Acoustic wave devices |
JPS6059809A (ja) * | 1983-09-12 | 1985-04-06 | Oki Electric Ind Co Ltd | 表面弾性波フィルタ |
-
1988
- 1988-09-28 DE DE3832943A patent/DE3832943A1/de not_active Withdrawn
-
1989
- 1989-08-23 US US07/671,913 patent/US5128640A/en not_active Expired - Lifetime
- 1989-08-23 JP JP1508569A patent/JPH03502866A/ja active Pending
- 1989-08-23 WO PCT/DE1989/000553 patent/WO1990003690A1/de active IP Right Grant
- 1989-08-23 EP EP89909160A patent/EP0436556B1/de not_active Expired - Lifetime
- 1989-08-23 DE DE8989909160T patent/DE58903754D1/de not_active Expired - Fee Related
- 1989-09-20 GR GR890100592A patent/GR890100592A/el unknown
- 1989-09-27 PT PT91820A patent/PT91820B/pt not_active IP Right Cessation
- 1989-09-28 ES ES8903284A patent/ES2015482A6/es not_active Expired - Fee Related
-
1991
- 1991-03-15 DK DK91464A patent/DK46491D0/da unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4044321A (en) * | 1976-03-01 | 1977-08-23 | Rockwell International Corporation | Surface acoustic wave band pass filtering |
US4468642A (en) * | 1981-06-05 | 1984-08-28 | Hitachi, Ltd. | Band pass filter device |
JPS60150312A (ja) * | 1984-01-18 | 1985-08-08 | Toshiba Corp | 弾性表面波フイルタ |
Non-Patent Citations (2)
Title |
---|
CLAIMS SEARCHED: ALL * |
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 318 (E-366)[2041], 13th December 1985; & JP-A-60 150 312 (TOSHIBA K.K.) 08-08-1985 * |
Also Published As
Publication number | Publication date |
---|---|
DK46491A (da) | 1991-03-15 |
DE3832943A1 (de) | 1990-03-29 |
EP0436556B1 (de) | 1993-03-10 |
WO1990003690A1 (de) | 1990-04-05 |
DK46491D0 (da) | 1991-03-15 |
DE58903754D1 (de) | 1993-04-15 |
US5128640A (en) | 1992-07-07 |
PT91820A (pt) | 1990-03-30 |
ES2015482A6 (es) | 1990-08-16 |
EP0436556A1 (de) | 1991-07-17 |
JPH03502866A (ja) | 1991-06-27 |
PT91820B (pt) | 1995-08-09 |
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