JPS55121180A - Electronic watch - Google Patents
Electronic watchInfo
- Publication number
- JPS55121180A JPS55121180A JP2726279A JP2726279A JPS55121180A JP S55121180 A JPS55121180 A JP S55121180A JP 2726279 A JP2726279 A JP 2726279A JP 2726279 A JP2726279 A JP 2726279A JP S55121180 A JPS55121180 A JP S55121180A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- oscillators
- oscillator
- frequency
- featuring
- 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 obtain the steady oscillation output over a wide temperature range by combining two oscillators using the crystal oscillators featuring the different peak temperature and then selecting the oscillator featuring the highest frequency for the watch signal.
CONSTITUTION: Crystal oscillators Xtal1, Xtal2 have the different peak temperatures, and the equal oscillation frequencies at the peak temperature are selected. The output of oscillators 1 and 2 are supplied to comparator circuit 3, and the frequency of oscillator 1 receives the 1/N division through divider circuit 3a along with the frequency of oscillator 2 counted through counter circuit 3c. And the scale of the frequencies of both oscillators receives the comparison based on the time difference due to whether the count contents of counter circuit 3c reaches the set value. The oscillation output selection signal is sent to switching circuit 4 from circuit 3, and divider/driver circuit 5 is selected and connected to the oscillator featuring the higher oscillation frequency.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2726279A JPS55121180A (en) | 1979-03-10 | 1979-03-10 | Electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2726279A JPS55121180A (en) | 1979-03-10 | 1979-03-10 | Electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55121180A true JPS55121180A (en) | 1980-09-18 |
Family
ID=12216155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2726279A Pending JPS55121180A (en) | 1979-03-10 | 1979-03-10 | Electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55121180A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014165623A (en) * | 2013-02-25 | 2014-09-08 | Nec Access Technica Ltd | Frequency adjustment circuit and frequency adjustment method |
US11725865B2 (en) | 2018-03-12 | 2023-08-15 | Lg Electronics Inc. | Refrigerator drain system |
-
1979
- 1979-03-10 JP JP2726279A patent/JPS55121180A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014165623A (en) * | 2013-02-25 | 2014-09-08 | Nec Access Technica Ltd | Frequency adjustment circuit and frequency adjustment method |
US11725865B2 (en) | 2018-03-12 | 2023-08-15 | Lg Electronics Inc. | Refrigerator drain system |
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