BE471729A - - Google Patents
Info
- Publication number
- BE471729A BE471729A BE471729DA BE471729A BE 471729 A BE471729 A BE 471729A BE 471729D A BE471729D A BE 471729DA BE 471729 A BE471729 A BE 471729A
- Authority
- BE
- Belgium
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
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02015—Characteristics of piezoelectric layers, e.g. cutting angles
-
- 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
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02157—Dimensional parameters, e.g. ratio between two dimension parameters, length, width or thickness
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US659678A US2440695A (en) | 1946-04-05 | 1946-04-05 | Piezoelectric crystal apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE471729A true BE471729A (cg-RX-API-DMAC7.html) |
Family
ID=24646347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE471729D BE471729A (cg-RX-API-DMAC7.html) | 1946-04-05 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2440695A (cg-RX-API-DMAC7.html) |
| BE (1) | BE471729A (cg-RX-API-DMAC7.html) |
| FR (1) | FR939913A (cg-RX-API-DMAC7.html) |
| GB (1) | GB631348A (cg-RX-API-DMAC7.html) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2460520A (en) * | 1946-02-09 | 1949-02-01 | Bell Telephone Labor Inc | Piezoelectric crystal apparatus |
| US2493145A (en) * | 1948-04-29 | 1950-01-03 | Brush Dev Co | Piezoelectric crystal apparatus |
| US2931924A (en) * | 1958-06-25 | 1960-04-05 | Philip A Simpson | Quartz oscillator unit for operation at low temperatures |
-
0
- BE BE471729D patent/BE471729A/xx unknown
-
1946
- 1946-04-05 US US659678A patent/US2440695A/en not_active Expired - Lifetime
-
1947
- 1947-01-23 FR FR939913D patent/FR939913A/fr not_active Expired
- 1947-03-21 GB GB7804/47A patent/GB631348A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB631348A (en) | 1949-11-01 |
| US2440695A (en) | 1948-05-04 |
| FR939913A (fr) | 1948-11-29 |