GB491407A - Improvements in or relating to piezoelectric crystal apparatus - Google Patents
Improvements in or relating to piezoelectric crystal apparatusInfo
- Publication number
- GB491407A GB491407A GB27378/37A GB2737837A GB491407A GB 491407 A GB491407 A GB 491407A GB 27378/37 A GB27378/37 A GB 27378/37A GB 2737837 A GB2737837 A GB 2737837A GB 491407 A GB491407 A GB 491407A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piezo
- electric
- cutting
- relating
- frequency
- Prior art date
- 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
- 239000013078 crystal Substances 0.000 title abstract 4
- 230000001154 acute effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
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 |
|---|---|
| GB491407A true GB491407A (en) | 1938-09-01 |
Family
ID=22345314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27378/37A Expired GB491407A (en) | 1936-11-25 | 1937-10-08 | Improvements in or relating to piezoelectric crystal apparatus |
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 |
| BE424774A (US06521211-20030218-C00004.png) |
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