JPS54148392A - Tuning fork type crystal oscillator - Google Patents
Tuning fork type crystal oscillatorInfo
- Publication number
- JPS54148392A JPS54148392A JP5695478A JP5695478A JPS54148392A JP S54148392 A JPS54148392 A JP S54148392A JP 5695478 A JP5695478 A JP 5695478A JP 5695478 A JP5695478 A JP 5695478A JP S54148392 A JPS54148392 A JP S54148392A
- Authority
- JP
- Japan
- Prior art keywords
- tuning fork
- electrode
- amplitude
- arm
- type crystal
- 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.)
- Pending
Links
- 239000013078 crystal Substances 0.000 title abstract 2
- 238000005452 bending Methods 0.000 abstract 2
- 230000008602 contraction Effects 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 230000007774 longterm Effects 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
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/21—Crystal tuning forks
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
PURPOSE:To minimize the tip amplitude of the tuning fork type crystal oscillator by improving the electrode structure and thus to facilitate the secondary higher harmonic vibration as well as to increase the top temperature up to 45-55 deg.C. CONSTITUTION:Electrodes 6-15 are provided to the tuning fork arm. In this case, the same polarity is secured between 6-8-10-12-14 and 11-13-15-7-9. In case terminal 16 is set positive with terminal 17 set negative each, the bending of the tuning fork arm is decided by the scale of the bending caused by the extension between electrode 6 and 7 plus the contraction between electrode 9 and 10. Thus, the tip amplitude is decided for the tuning fork oscillator. When the electrodes are distributed so that the field intensity between electrode 6-7 and 9-10 may be higher than that between electrode 7-8 and 8-9, no deterioration is caused for the dynamic impedance since the dynamic impedance is determined by the distortion near the outside of the tuning fork arm. Thus, the tip amplitude is minimized with the enhanced long-term reliability. Also, the secondary higher harmonic amplitude can be facilitated and the peak temperature can be increased up to 45-55 deg.C by reversing the field direction according to the position of the tuning for arm. As a result, the temperature compensation becomes possible over a wide range with use of plural units of oscillators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5695478A JPS54148392A (en) | 1978-05-12 | 1978-05-12 | Tuning fork type crystal oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5695478A JPS54148392A (en) | 1978-05-12 | 1978-05-12 | Tuning fork type crystal oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54148392A true JPS54148392A (en) | 1979-11-20 |
Family
ID=13041928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5695478A Pending JPS54148392A (en) | 1978-05-12 | 1978-05-12 | Tuning fork type crystal oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54148392A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4531073A (en) * | 1983-05-31 | 1985-07-23 | Ohaus Scale Corporation | Piezoelectric crystal resonator with reduced impedance and sensitivity to change in humidity |
-
1978
- 1978-05-12 JP JP5695478A patent/JPS54148392A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4531073A (en) * | 1983-05-31 | 1985-07-23 | Ohaus Scale Corporation | Piezoelectric crystal resonator with reduced impedance and sensitivity to change in humidity |
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