JPS54136379A - Digital watch with chronograph - Google Patents

Digital watch with chronograph

Info

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
Application number
JP4392678A
Other languages
Japanese (ja)
Inventor
Shingo Ichikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP4392678A priority Critical patent/JPS54136379A/en
Publication of JPS54136379A publication Critical patent/JPS54136379A/en
Pending legal-status Critical Current

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
JP4392678A 1978-04-14 1978-04-14 Digital watch with chronograph Pending JPS54136379A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56153892U (en) * 1980-04-18 1981-11-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56153892U (en) * 1980-04-18 1981-11-17

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