FR2133821B1 - - Google Patents
Info
- Publication number
- FR2133821B1 FR2133821B1 FR7213445A FR7213445A FR2133821B1 FR 2133821 B1 FR2133821 B1 FR 2133821B1 FR 7213445 A FR7213445 A FR 7213445A FR 7213445 A FR7213445 A FR 7213445A FR 2133821 B1 FR2133821 B1 FR 2133821B1
- 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 elements; 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 elements; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02881—Means for compensation or elimination of undesirable effects of diffraction of wave beam
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB973671A GB1360235A (en) | 1971-04-17 | 1971-04-17 | Acoustic surface wave devices |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2133821A1 FR2133821A1 (cs) | 1972-12-01 |
FR2133821B1 true FR2133821B1 (cs) | 1979-01-12 |
Family
ID=9877785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7213445A Expired FR2133821B1 (cs) | 1971-04-17 | 1972-04-17 |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2133821B1 (cs) |
GB (1) | GB1360235A (cs) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1512686A (en) * | 1975-08-18 | 1978-06-01 | Mullard Ltd | Acoustic surface wave devices |
US4918349A (en) * | 1987-11-13 | 1990-04-17 | Hitachi, Ltd. | Surface acoustic wave device having apodized transducer provided with irregular pitch electrode group |
JP3456810B2 (ja) | 1995-11-10 | 2003-10-14 | 東芝電子エンジニアリング株式会社 | 弾性表面波フィルタ |
JPH11225038A (ja) * | 1998-02-06 | 1999-08-17 | Murata Mfg Co Ltd | 弾性表面波装置 |
DE102010055628B4 (de) | 2010-12-22 | 2018-09-06 | Snaptrack, Inc. | Elektroakustischer Resonator |
-
1971
- 1971-04-17 GB GB973671A patent/GB1360235A/en not_active Expired
-
1972
- 1972-04-17 FR FR7213445A patent/FR2133821B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2133821A1 (cs) | 1972-12-01 |
GB1360235A (en) | 1974-07-17 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |