JPS54140569A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS54140569A
JPS54140569A JP4776278A JP4776278A JPS54140569A JP S54140569 A JPS54140569 A JP S54140569A JP 4776278 A JP4776278 A JP 4776278A JP 4776278 A JP4776278 A JP 4776278A JP S54140569 A JPS54140569 A JP S54140569A
Authority
JP
Japan
Prior art keywords
circuit
accordance
time
frequency dividing
erroneous
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
JP4776278A
Other languages
Japanese (ja)
Inventor
Takeshi Matsukuma
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4776278A priority Critical patent/JPS54140569A/en
Publication of JPS54140569A publication Critical patent/JPS54140569A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Abstract

PURPOSE:To improve the accuracy of a watch by controlling the width of the pulses, which are generated by an oscillatory or frequency dividing circuit, in accordance with an erroneous time. CONSTITUTION:In accordance with the display of a display circuit 4, the frequency dividing output of a frequency dividing circuit 2 is corrected through a time correcting signal generating circuit 5 and a time correcting circuit 6 thereby to correct the time. Prior to the correction, in accordance with the counted value of a counter 3, a erroneous time detecteing circuit 7 detects the erroneous time, which is impressed upon an advance and retard control signal generating circuit 9. Thus, this circuit 9 feeds the retard control signals, which are weighed in accordance with the counted value of such a counter 8 as is reset on the basis of the output of the circuit 5, to an oscillatory circuit 1 which is composed of a variable frequency circuit or a program divider. Then, the width of the pulses generated by the circuit 1 is controlled in accordance with the error so that a highly accurate watch can be provided.
JP4776278A 1978-04-24 1978-04-24 Electronic watch Pending JPS54140569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4776278A JPS54140569A (en) 1978-04-24 1978-04-24 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4776278A JPS54140569A (en) 1978-04-24 1978-04-24 Electronic watch

Publications (1)

Publication Number Publication Date
JPS54140569A true JPS54140569A (en) 1979-10-31

Family

ID=12784373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4776278A Pending JPS54140569A (en) 1978-04-24 1978-04-24 Electronic watch

Country Status (1)

Country Link
JP (1) JPS54140569A (en)

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