FR2447644B1 - - Google Patents
Info
- Publication number
- FR2447644B1 FR2447644B1 FR7902100A FR7902100A FR2447644B1 FR 2447644 B1 FR2447644 B1 FR 2447644B1 FR 7902100 A FR7902100 A FR 7902100A FR 7902100 A FR7902100 A FR 7902100A FR 2447644 B1 FR2447644 B1 FR 2447644B1
- Authority
- FR
- France
- 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
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
- H03H9/14544—Transducers of particular shape or position
- H03H9/14552—Transducers of particular shape or position comprising split fingers
-
- 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
-
- 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
-
- 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
- H03H9/14517—Means for weighting
- H03H9/1452—Means for weighting by finger overlap length, apodisation
-
- 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
- H03H9/14547—Fan shaped; Tilted; Shifted; Slanted; Tapered; Arched; Stepped finger transducers
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7902100A FR2447644A1 (fr) | 1979-01-26 | 1979-01-26 | Transducteur d'ondes elastiques de surface et filtre comprenant un tel transducteur |
EP80400035A EP0014117B1 (fr) | 1979-01-26 | 1980-01-11 | Transducteur d'ondes élastiques de surface et filtre comprenant un tel transducteur |
DE8080400035T DE3063999D1 (en) | 1979-01-26 | 1980-01-11 | Surface acoustic wave transducer and filter comprising same |
JP534980A JPS55100721A (en) | 1979-01-26 | 1980-01-22 | Elastic surface wave converter and elastic surface wave filter |
US06/115,095 US4344051A (en) | 1979-01-26 | 1980-01-24 | Elastic surface wave transducer and filter incorporating such a transducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7902100A FR2447644A1 (fr) | 1979-01-26 | 1979-01-26 | Transducteur d'ondes elastiques de surface et filtre comprenant un tel transducteur |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2447644A1 FR2447644A1 (fr) | 1980-08-22 |
FR2447644B1 true FR2447644B1 (US07582779-20090901-C00044.png) | 1982-12-03 |
Family
ID=9221267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7902100A Granted FR2447644A1 (fr) | 1979-01-26 | 1979-01-26 | Transducteur d'ondes elastiques de surface et filtre comprenant un tel transducteur |
Country Status (5)
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5843609A (ja) * | 1981-09-09 | 1983-03-14 | Toshiba Corp | 弾性表面波装置 |
US4460995A (en) * | 1982-04-21 | 1984-07-17 | Zenith Radio Corporation | Narrow focus compensating transducer for surface acoustic wave filter |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1357193A (en) * | 1971-07-22 | 1974-06-19 | Mullard Ltd | Acoustic surface wave devices |
GB1499330A (en) * | 1974-09-26 | 1978-02-01 | Plessey Co Ltd | Acoustic surface wave filters |
FR2319245A1 (fr) * | 1975-07-24 | 1977-02-18 | Thomson Csf | Transducteur perfectionne pour filtre a ondes de surface a fonction de transfert asymetrique et filtre comportant un tel transducteur |
FR2328323A1 (fr) * | 1975-10-17 | 1977-05-13 | Thomson Csf | Transducteur pour filtre a ondes de surface a diffraction reduite, et filtre comportant un tel transducteur |
GB1585087A (en) * | 1976-07-29 | 1981-02-25 | Plessey Co Ltd | Surface acoustic wave filters |
JPS54844A (en) * | 1977-06-03 | 1979-01-06 | Matsushita Electric Ind Co Ltd | Elastic surface wave filter |
-
1979
- 1979-01-26 FR FR7902100A patent/FR2447644A1/fr active Granted
-
1980
- 1980-01-11 EP EP80400035A patent/EP0014117B1/fr not_active Expired
- 1980-01-11 DE DE8080400035T patent/DE3063999D1/de not_active Expired
- 1980-01-22 JP JP534980A patent/JPS55100721A/ja active Pending
- 1980-01-24 US US06/115,095 patent/US4344051A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US4344051A (en) | 1982-08-10 |
EP0014117B1 (fr) | 1983-07-06 |
EP0014117A1 (fr) | 1980-08-06 |
DE3063999D1 (en) | 1983-08-11 |
FR2447644A1 (fr) | 1980-08-22 |
JPS55100721A (en) | 1980-07-31 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |