JPS54123861A - Crystal oscillation circuit for electronic watch - Google Patents
Crystal oscillation circuit for electronic watchInfo
- Publication number
- JPS54123861A JPS54123861A JP3062078A JP3062078A JPS54123861A JP S54123861 A JPS54123861 A JP S54123861A JP 3062078 A JP3062078 A JP 3062078A JP 3062078 A JP3062078 A JP 3062078A JP S54123861 A JPS54123861 A JP S54123861A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- oscillation circuit
- temperature
- frequency
- inverter
- 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.)
- Granted
Links
Abstract
PURPOSE:To establish the oscillation circuit which improves the frequency-temperature performance, by connecting the capacitor C of positive capacitance versus temperature performance to the input terminal of the inverter of the crystal oscillation circuit and C of negative performance to the output terminal. CONSTITUTION:In the capacitance-temperature performance of the input capacitor Cin 8 connected to the input terminal IN of the inverter 2 of the crystal oscillation circuit consisting of the crystal oscillator 1 and the amplifying inverter 2, Curie point c p as shown in Fig. a is present at high temperatures, and the temperature compensation capacitor having smaller secondary constant is used. Further, the output capacitor COUT 9 connected to the output terminal OUT has c p at low temperatures as shown in Fig. b and also, smaller secondary constant capacitor is used. Thus, the temperature compensation for the frequency at higher temperatures is made with COUT 9 and that for low temperatures is by Cin 8, and the frequency-temperature performance is almost flat from -20 to 60 deg.C. Further, the minimum operation voltage at low temperature region and the consumed current at high temperature region can also be improved.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3062078A JPS54123861A (en) | 1978-03-17 | 1978-03-17 | Crystal oscillation circuit for electronic watch |
| US06/021,114 US4223524A (en) | 1978-03-17 | 1979-03-16 | Quartz oscillation circuit for electronic timepieces |
| GB7909413A GB2018539B (en) | 1978-03-17 | 1979-03-16 | Temperature compensation of quarty oscillators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3062078A JPS54123861A (en) | 1978-03-17 | 1978-03-17 | Crystal oscillation circuit for electronic watch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54123861A true JPS54123861A (en) | 1979-09-26 |
| JPS6115607B2 JPS6115607B2 (en) | 1986-04-25 |
Family
ID=12308896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3062078A Granted JPS54123861A (en) | 1978-03-17 | 1978-03-17 | Crystal oscillation circuit for electronic watch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54123861A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57199304A (en) * | 1981-06-02 | 1982-12-07 | Seikosha Co Ltd | Quartz oscillating circuit |
| JPS62140506A (en) * | 1985-12-14 | 1987-06-24 | Nippon Dempa Kogyo Co Ltd | High speed type cmos piezoelectric oscillator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021128364A (en) * | 2020-02-10 | 2021-09-02 | 三菱重工業株式会社 | Abnormality detection device, abnormality detection method and program |
-
1978
- 1978-03-17 JP JP3062078A patent/JPS54123861A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57199304A (en) * | 1981-06-02 | 1982-12-07 | Seikosha Co Ltd | Quartz oscillating circuit |
| JPS62140506A (en) * | 1985-12-14 | 1987-06-24 | Nippon Dempa Kogyo Co Ltd | High speed type cmos piezoelectric oscillator |
| JPH0558281B2 (en) * | 1985-12-14 | 1993-08-26 | Nippon Denpa Kogyo Kk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6115607B2 (en) | 1986-04-25 |
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