BE424774A - - Google Patents
Info
- Publication number
- BE424774A BE424774A BE424774DA BE424774A BE 424774 A BE424774 A BE 424774A BE 424774D A BE424774D A BE 424774DA BE 424774 A BE424774 A BE 424774A
- 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 devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02015—Characteristics of piezoelectric layers, e.g. cutting angles
- H03H9/02023—Characteristics of piezoelectric layers, e.g. cutting angles consisting of quartz
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 |
|---|---|---|---|
| US112685A US2277245A (en) | 1936-11-25 | 1936-11-25 | Piezoelectric crystal apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE424774A true BE424774A (US06521211-20030218-C00004.png) |
Family
ID=22345314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE424774D BE424774A (US06521211-20030218-C00004.png) | 1936-11-25 |
Country Status (5)
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2436202A (en) * | 1945-02-13 | 1948-02-17 | Gen Electric | Piezoelectric apparatus |
| US2743144A (en) * | 1951-04-07 | 1956-04-24 | Motorola Inc | Zero temperature coefficient piezoelectric crystal |
| US2931924A (en) * | 1958-06-25 | 1960-04-05 | Philip A Simpson | Quartz oscillator unit for operation at low temperatures |
| CH536561A (de) * | 1971-03-15 | 1973-04-30 | Kistler Instrumente Ag | Piezoelektrisches Kristallelement |
| GB1592010A (en) * | 1977-01-12 | 1981-07-01 | Suwa Seikosha Kk | Contour vibrator |
| US4419600A (en) * | 1980-11-05 | 1983-12-06 | Schlumberger Technology Corporation | Stress-compensated quartz resonators |
-
0
- BE BE424774D patent/BE424774A/xx unknown
-
1936
- 1936-11-25 US US112685A patent/US2277245A/en not_active Expired - Lifetime
-
1937
- 1937-10-08 GB GB27378/37A patent/GB491407A/en not_active Expired
- 1937-11-25 CH CH238066D patent/CH238066A/de unknown
- 1937-11-25 FR FR829898D patent/FR829898A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH238066A (de) | 1945-06-15 |
| FR829898A (fr) | 1938-07-08 |
| US2277245A (en) | 1942-03-24 |
| GB491407A (en) | 1938-09-01 |
