JPS5479617A - Oscillation circuit using piezoelectric vibrators - Google Patents
Oscillation circuit using piezoelectric vibratorsInfo
- Publication number
- JPS5479617A JPS5479617A JP14748277A JP14748277A JPS5479617A JP S5479617 A JPS5479617 A JP S5479617A JP 14748277 A JP14748277 A JP 14748277A JP 14748277 A JP14748277 A JP 14748277A JP S5479617 A JPS5479617 A JP S5479617A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- beta1
- beta2
- curve
- tuning fork
- 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
- 230000010355 oscillation Effects 0.000 title abstract 2
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
- H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
PURPOSE:To obtain an oxcillation circuit suited for highly accurate time standard by electrically serially connecting two piezoelectric vibrators whose frequency- temperature characteristics are approximately quadratic curves and the codes of the secondary temperature coefficients thereof are opposite. CONSTITUTION:The oscillation circuit is formed by electrically serially connecting a tuning fork type flexural crystal vibrator 5 having the frequency-temperature characteristics showing a quadratic curve 2 being convex upward and a lithium tantalate tuning fork type vibrator 6 showing a quadratic curve 3 being convex downward. Further the zero temperature coefficient temperatures of the respective vibrators are made within a range from 15 to 30 deg.C and the differences therebetween is made less than 5 deg.C. If the secondary temperature coefficient are let to be beta1, beta2 respectively and equivalent capacities to be C11, C12, then ¦beta2¦/¦beta1 C12/C11 is satisfied so as to have flat characteristics like a curve 4. Because of this, the fluctuations of frequencies with respect to temperature changes may be reduced and the reliability such as of electronic wristwatches, etc. may be improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14748277A JPS5479617A (en) | 1977-12-08 | 1977-12-08 | Oscillation circuit using piezoelectric vibrators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14748277A JPS5479617A (en) | 1977-12-08 | 1977-12-08 | Oscillation circuit using piezoelectric vibrators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5479617A true JPS5479617A (en) | 1979-06-25 |
Family
ID=15431384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14748277A Pending JPS5479617A (en) | 1977-12-08 | 1977-12-08 | Oscillation circuit using piezoelectric vibrators |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5479617A (en) |
-
1977
- 1977-12-08 JP JP14748277A patent/JPS5479617A/en active Pending
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