JPS5517426A - Initial value set circuit for electronic watch - Google Patents
Initial value set circuit for electronic watchInfo
- Publication number
- JPS5517426A JPS5517426A JP9014978A JP9014978A JPS5517426A JP S5517426 A JPS5517426 A JP S5517426A JP 9014978 A JP9014978 A JP 9014978A JP 9014978 A JP9014978 A JP 9014978A JP S5517426 A JPS5517426 A JP S5517426A
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- output
- power supply
- vss
- vdd
- 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
Landscapes
- Electric Clocks (AREA)
- Electromechanical Clocks (AREA)
Abstract
PURPOSE: To set the initial value of FF including frequency demultiplier and to enable to achieve small volume with less components and low cost, by detecting the time lag until the power supply is applied and the crystal starts oscillation.
CONSTITUTION: The oscillation section a is gradually oscillated when the power supply is applied, and the output is about intermediate between the power supply voltage VDD and VSS when it is not in oscillation and the output is the amplitude Schmitt trigger circuit b is set higher than Vm, the output of trigger b is at VSS when not in oscillation and it is pulsive when the oscillation amplitude exceeds VTH. The output Q is at VDD of the set priority FF d from the application of power supply till the time when the oscillation amplitude exceeds VTH. The counter circuits e to i are in reset state, and when the oscillation voltag exceeds VTH, the output Q of FF d is changed from VDD to VSS to bring the circuits e to i into frequency dividable.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9014978A JPS5517426A (en) | 1978-07-24 | 1978-07-24 | Initial value set circuit for electronic watch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9014978A JPS5517426A (en) | 1978-07-24 | 1978-07-24 | Initial value set circuit for electronic watch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5517426A true JPS5517426A (en) | 1980-02-06 |
Family
ID=13990435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9014978A Pending JPS5517426A (en) | 1978-07-24 | 1978-07-24 | Initial value set circuit for electronic watch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5517426A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104882A (en) * | 1980-12-22 | 1982-06-30 | Seiko Epson Corp | Power on clear circuit in electronic watch |
-
1978
- 1978-07-24 JP JP9014978A patent/JPS5517426A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104882A (en) * | 1980-12-22 | 1982-06-30 | Seiko Epson Corp | Power on clear circuit in electronic watch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5625290A (en) | Semiconductor circuit | |
| JPS6441519A (en) | Semiconductor integrated circuit | |
| JPS56122526A (en) | Semiconductor integrated circuit | |
| JPS5498275A (en) | Analog type electronic watch | |
| JPS5364454A (en) | Oscillator circuit | |
| JPS5517426A (en) | Initial value set circuit for electronic watch | |
| JPS56150382A (en) | Electronic watch | |
| JPS5485767A (en) | Electronic watch | |
| JPS5791029A (en) | Power-on reset circuit | |
| JPS5610280A (en) | Electronic clock circuit | |
| JPS52104973A (en) | Direct phase comparison circuit | |
| JPS5368057A (en) | Electronic watch | |
| JPS56100525A (en) | Electronic timer circuit | |
| JPS5557169A (en) | Initial value setting circuit for electronic watch | |
| JPS5342776A (en) | Alarm electronic watch | |
| JPS54162577A (en) | Low voltage detecting circuit | |
| JPS574576A (en) | Electronic watch with stopwatch and timer | |
| JPS55118117A (en) | Initial state setting circuit | |
| JPS52123662A (en) | Ic inspection circuit in electronic watches | |
| JPS5373948A (en) | Oscillator circuit | |
| JPS5323669A (en) | Small electronic device | |
| JPS5582319A (en) | Voltage control circuit | |
| JPS5711529A (en) | Semiconductor device | |
| JPS55162633A (en) | Bootstrap circuit | |
| JPS5223335A (en) | Electronic camera |