JPS54118871A - Crystal oscillation type wristwatch - Google Patents

Crystal oscillation type wristwatch

Info

Publication number
JPS54118871A
JPS54118871A JP2567578A JP2567578A JPS54118871A JP S54118871 A JPS54118871 A JP S54118871A JP 2567578 A JP2567578 A JP 2567578A JP 2567578 A JP2567578 A JP 2567578A JP S54118871 A JPS54118871 A JP S54118871A
Authority
JP
Japan
Prior art keywords
frequency correction
selection
circuit
pattern
mode
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
JP2567578A
Other languages
Japanese (ja)
Inventor
Tsuguo Gomi
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP2567578A priority Critical patent/JPS54118871A/en
Publication of JPS54118871A publication Critical patent/JPS54118871A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G04G3/022—Circuits for deriving low frequency timing pulses from pulses of higher frequency the desired number of pulses per unit of time being obtained by adding to or substracting from a pulse train one or more pulses

Abstract

PURPOSE:To enable the selection and change of patterns to be performed through operations of external switches by preparing plural sets of frequency correction quantity patterns. CONSTITUTION:A memory circuit is constituted by the pattern blocks 51 thru 53 consisting of the aggregate of the memory cells 54 thru 56 storing the frequency correction quantities for the temperature suited to respective regions or conditions of a country,. Then, when mode setting is performed by operating the digit selection switch A for pattern selection and mode and time correction of a selection and correction circuit 7 and the mode selected by the selection switch A is set at a desired value by operating a setting switch B, then a frequency correction signal generating circuit 6 reads out the frequency correction quantity pattern 5a from the memory circuit 5 having been selected and determined by the control signal 3a and control signal 7a from a clock circuit 3 and generates the frequency correction signal 6a for correcting the time reference signal (f) of a crystal oscillator 1, having the same displayed in a display device 4.
JP2567578A 1978-03-07 1978-03-07 Crystal oscillation type wristwatch Pending JPS54118871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2567578A JPS54118871A (en) 1978-03-07 1978-03-07 Crystal oscillation type wristwatch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2567578A JPS54118871A (en) 1978-03-07 1978-03-07 Crystal oscillation type wristwatch

Publications (1)

Publication Number Publication Date
JPS54118871A true JPS54118871A (en) 1979-09-14

Family

ID=12172349

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2567578A Pending JPS54118871A (en) 1978-03-07 1978-03-07 Crystal oscillation type wristwatch

Country Status (1)

Country Link
JP (1) JPS54118871A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104504A (en) * 1980-01-10 1981-08-20 Suisse Horlogerie Oscillator and method of manufacturing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104504A (en) * 1980-01-10 1981-08-20 Suisse Horlogerie Oscillator and method of manufacturing same

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