JPS54136379A - Digital watch with chronograph - Google Patents
Digital watch with chronographInfo
- Publication number
- JPS54136379A JPS54136379A JP4392678A JP4392678A JPS54136379A JP S54136379 A JPS54136379 A JP S54136379A JP 4392678 A JP4392678 A JP 4392678A JP 4392678 A JP4392678 A JP 4392678A JP S54136379 A JPS54136379 A JP S54136379A
- Authority
- JP
- Japan
- Prior art keywords
- counter
- chronograph
- decoder
- chrono
- circuits
- 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)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
PURPOSE: To achieve the simplification of circuits of an electronic watch with chronograph by letting a counter for 1 second and under be of scale of 2n and providing a decoder displaying the count values thereof approximately.
CONSTITUTION: Clock ϕ2 for chromograph of 32Hz is drawn out from the 9th stage of an FF of 15 stages connected to a reference crystal oscillator 1 and is supplied to a chrono counter 4. The abovementioned counter 4 consists of a counter 4a performing counting of 0.1 second unit and a counter 4b outputting the carry signal ϕ3 thereof, these being FFs of 5 stages. A chromo decoder 8 outputs the signal displaying the contents of the counter 4a approximately. Now, the chronograph state is set by the operation of a function switch 12 and the chromographic display may be started, stopped and reset through combination of the operations of a chrono control switch 13 and a reset switch 14. The above constitution enables the circuits of the electronic watch with chronograph to be simplified.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4392678A JPS54136379A (en) | 1978-04-14 | 1978-04-14 | Digital watch with chronograph |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4392678A JPS54136379A (en) | 1978-04-14 | 1978-04-14 | Digital watch with chronograph |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54136379A true JPS54136379A (en) | 1979-10-23 |
Family
ID=12677295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4392678A Pending JPS54136379A (en) | 1978-04-14 | 1978-04-14 | Digital watch with chronograph |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54136379A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56153892U (en) * | 1980-04-18 | 1981-11-17 |
-
1978
- 1978-04-14 JP JP4392678A patent/JPS54136379A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56153892U (en) * | 1980-04-18 | 1981-11-17 |
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