JPS5458468A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS5458468A
JPS5458468A JP12484777A JP12484777A JPS5458468A JP S5458468 A JPS5458468 A JP S5458468A JP 12484777 A JP12484777 A JP 12484777A JP 12484777 A JP12484777 A JP 12484777A JP S5458468 A JPS5458468 A JP S5458468A
Authority
JP
Japan
Prior art keywords
transistor
frequency
electronic watch
frequency dividers
division
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
JP12484777A
Other languages
Japanese (ja)
Inventor
Yasutaka Nakasaki
Tatsuji Asakawa
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 JP12484777A priority Critical patent/JPS5458468A/en
Publication of JPS5458468A publication Critical patent/JPS5458468A/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

Landscapes

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

Abstract

PURPOSE:To adjust freguency of electronic watch at high precision and in a wide range by selecting the set and reset signals of frequency dividers according to the contents in the memory circuit controlled externally. CONSTITUTION:The reference frequency signal delivered by a reference oscillator is divided down by plural frequency dividers. When the division outputs are applied to an adjusting device which is externally connected to a watch, the adjusting device will generate specified rate adjusting signal. Therefore, when a high level signal is applied to the gate of MOS transistor 44, since the impedance of resistor 45 is designed higher than the turn-on impedance of transistor 44, the transistor 44 is turned off. On the other hand, a MOS transistor 46, to which is applied a voltage Vm lower than the write-in voltage of FAMOS transistor 47, is turned on, so that high level signals for rate adjustment are written into dual MOS transistors 47, 48. By controlling the setting and resetting of the frequency dividers in each division region according to those memory contents, the division output transmitted to the time measuring mechanism is compensated, so that the frequency of electronic watch may be adjusted at high precision and in a wide range.
JP12484777A 1977-10-18 1977-10-18 Electronic watch Pending JPS5458468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12484777A JPS5458468A (en) 1977-10-18 1977-10-18 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12484777A JPS5458468A (en) 1977-10-18 1977-10-18 Electronic watch

Publications (1)

Publication Number Publication Date
JPS5458468A true JPS5458468A (en) 1979-05-11

Family

ID=14895560

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12484777A Pending JPS5458468A (en) 1977-10-18 1977-10-18 Electronic watch

Country Status (1)

Country Link
JP (1) JPS5458468A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011237239A (en) * 2010-05-10 2011-11-24 Seiko Epson Corp Electronic apparatus with timer function and control method of the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011237239A (en) * 2010-05-10 2011-11-24 Seiko Epson Corp Electronic apparatus with timer function and control method of the same

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