JPS5557182A - Oscillator device with temperature compensation for electronic watch - Google Patents
Oscillator device with temperature compensation for electronic watchInfo
- Publication number
- JPS5557182A JPS5557182A JP12923878A JP12923878A JPS5557182A JP S5557182 A JPS5557182 A JP S5557182A JP 12923878 A JP12923878 A JP 12923878A JP 12923878 A JP12923878 A JP 12923878A JP S5557182 A JPS5557182 A JP S5557182A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- signals
- timer
- 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.)
- Pending
Links
Abstract
PURPOSE: To increase the accuracy of the crystal watch by switching the two output signals based on the detection information on the difference and the scale of the frequencies of the two crystal oscillator circuits featuring the different temperature- frequency characteristics.
CONSTITUTION: Rectangular wave signals P1 and P2 featuring the temperature- frequency characteristics f1 and f2 of crystal oscillator circuit 1 and 2 are changed into output signal P3 the frequency of which is equal to beat frequency fB of f1 and f2 in case the phase difference is zero at phase detector circuit 3 and then supplied to compensation control circuit 9 to undergo 1/n by divider circuit 4 and then to be changed into signal P4. Then α timer 6 counts the units of signal P3 and transmits signal P5 to signal switch circuit 8. And the transmission of P5 is stopped when the number of the signals reaches α to start β timer 7. Timer 7 transmits signal P6 to circuit 8 only for the time of β=n.B to fixed time B second. And circuit 9 transmits signal P8 to circuit 8 so that the output period of signals P5 and P6 may be the correction time and at the same time performs the switching between signals P1 and P2 through the count unit designation of timer 6 plus circuit 8 and by signal P7 sent from speed decision circuit 5 which desides the scale of the frequencies of signals P1 and P2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12923878A JPS5557182A (en) | 1978-10-20 | 1978-10-20 | Oscillator device with temperature compensation for electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12923878A JPS5557182A (en) | 1978-10-20 | 1978-10-20 | Oscillator device with temperature compensation for electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5557182A true JPS5557182A (en) | 1980-04-26 |
Family
ID=15004593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12923878A Pending JPS5557182A (en) | 1978-10-20 | 1978-10-20 | Oscillator device with temperature compensation for electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5557182A (en) |
-
1978
- 1978-10-20 JP JP12923878A patent/JPS5557182A/en active Pending
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