GB479987A - Piezo-electric crystal devices - Google Patents
Piezo-electric crystal devicesInfo
- Publication number
- GB479987A GB479987A GB11684/37A GB1168437A GB479987A GB 479987 A GB479987 A GB 479987A GB 11684/37 A GB11684/37 A GB 11684/37A GB 1168437 A GB1168437 A GB 1168437A GB 479987 A GB479987 A GB 479987A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- ratio
- piezo
- axis
- width
- 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
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
-
- 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
- H03H9/02157—Dimensional parameters, e.g. ratio between two dimension parameters, length, width or thickness
Abstract
479,987. Piezo - electric crystals. STANDARD TELEPHONES & CABLES, Ltd. April 23, 1937, No. 11684. Convention date, June 12, 1936. [Class 40 (v)] A quartz crystal 1, is cut with its plane at an angle # of +35‹ to +60‹ (or -50‹ to -70‹) with the optic axis Z, and with its major axis 5 at an angle # of 45‹ with the X-axis, the ratio of the width w to the length l lying between 0À05 and 1À0. Preferably the ratio w/l is 0À875 when # is preferably +51À5‹. When # is -67À5‹, the ratio w/l is preferably 0À67. The Specification includes a curve relating frequency to # when # = 45‹, Fig. 6 (not shown); this is to be used in conjunction with curves relating change in frequency to change in temperature for #=38‹, 51¢‹ and 60‹, Fig. 7 (not shown) ; the ratio w/l is chosen from curves relating w/l to O, Fig. 8 (not shown). The frequency variation with temperature may be finally adjusted by reducing the width; this operation has little effect on frequency since this is mainly determined by the length. The frequency may be lowered by concaving either or both ends. British Specifications 479,637 and 479,979, and U.S.A. Specification 2,032,805 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US479987XA | 1936-06-12 | 1936-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB479987A true GB479987A (en) | 1938-02-15 |
Family
ID=21952214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11684/37A Expired GB479987A (en) | 1936-06-12 | 1937-04-23 | Piezo-electric crystal devices |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE903351C (en) |
| FR (1) | FR822488A (en) |
| GB (1) | GB479987A (en) |
| NL (1) | NL51121C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4410827A (en) * | 1980-04-24 | 1983-10-18 | Kabushiki Kaisha Suwa Seikosha | Mode coupled notched tuning fork type quartz crystal resonator |
| GB2117968A (en) * | 1982-03-16 | 1983-10-19 | Seiko Instr & Electronics | Gt-cut piezo-electric resonator |
| US4711047A (en) * | 1985-01-24 | 1987-12-08 | The State Of Israel, Ministry Of Defence, Israel Military Industries | Signal flare cartridge |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6051283B2 (en) * | 1975-09-10 | 1985-11-13 | 株式会社精工舎 | How to adjust frequency temperature characteristics of GT cut crystal resonator |
| FR2363825A1 (en) * | 1976-09-07 | 1978-03-31 | Seikosha Kk | Quartz oscillator for electronic timepiece - comprising quartz chip supported by wires running parallel to its planar faces |
| US4447753A (en) * | 1981-03-25 | 1984-05-08 | Seiko Instruments & Electronics Ltd. | Miniature GT-cut quartz resonator |
-
1937
- 1937-04-23 GB GB11684/37A patent/GB479987A/en not_active Expired
- 1937-05-27 DE DEW3474D patent/DE903351C/en not_active Expired
- 1937-05-31 FR FR822488D patent/FR822488A/en not_active Expired
- 1937-06-11 NL NL82867A patent/NL51121C/xx active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4410827A (en) * | 1980-04-24 | 1983-10-18 | Kabushiki Kaisha Suwa Seikosha | Mode coupled notched tuning fork type quartz crystal resonator |
| GB2117968A (en) * | 1982-03-16 | 1983-10-19 | Seiko Instr & Electronics | Gt-cut piezo-electric resonator |
| US4711047A (en) * | 1985-01-24 | 1987-12-08 | The State Of Israel, Ministry Of Defence, Israel Military Industries | Signal flare cartridge |
Also Published As
| Publication number | Publication date |
|---|---|
| FR822488A (en) | 1937-12-30 |
| NL51121C (en) | 1941-10-15 |
| DE903351C (en) | 1954-02-04 |
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