JPS5479672A - Temperature compensating electronic watch - Google Patents

Temperature compensating electronic watch

Info

Publication number
JPS5479672A
JPS5479672A JP14672377A JP14672377A JPS5479672A JP S5479672 A JPS5479672 A JP S5479672A JP 14672377 A JP14672377 A JP 14672377A JP 14672377 A JP14672377 A JP 14672377A JP S5479672 A JPS5479672 A JP S5479672A
Authority
JP
Japan
Prior art keywords
circuit
pulse
temperature
piezoelectric
beat
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
JP14672377A
Other languages
Japanese (ja)
Inventor
Masaaki Kato
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 Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP14672377A priority Critical patent/JPS5479672A/en
Publication of JPS5479672A publication Critical patent/JPS5479672A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
    • G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses
    • G04F5/06—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses using piezoelectric resonators

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

PURPOSE:To enable flat temperature characteristics to be obtained and realize super high accuracy watch of several seconds of annual difference by performing temperature compensation by the use of two piezoelectric oscillators having respective positive and negative secondary temperature coefficients. CONSTITUTION:Outputs of a piezoelectric oscillator 1 containing a piezoelectric vibrator la having a negative secondary temperature coefficient and a piezoelectric vibrator 1a having a negative secondary temperature coefficient and a piezoelectric oscillator 2 containing a piezoelectric vibrator 2a having a positive secondary temperature coefficient are both inputted to a beat circuit 31, by which the frequency difference thereof is obtained. The output of the beat circuit 31 enters the T input of the T type flip-flop F1 in a temperature compensation pulse forming circuit 32, where it is divided down to 1/2. This input then enters a pulse rise detection circuit 3d, and the fine pulse is outputted from the rise detection circuit 3d at the rise of the pulse. This is then passed to a pulse interruption circuit 33, then a constant accurate output is inputted to a frequency diving circuit 4 irrespective of temperature by the temperature compensation circuit 3 combining the beat circuit 31, temperature com pensation pulse forming circuit 32 and pulse interruption circuit 33.
JP14672377A 1977-12-07 1977-12-07 Temperature compensating electronic watch Pending JPS5479672A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14672377A JPS5479672A (en) 1977-12-07 1977-12-07 Temperature compensating electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14672377A JPS5479672A (en) 1977-12-07 1977-12-07 Temperature compensating electronic watch

Publications (1)

Publication Number Publication Date
JPS5479672A true JPS5479672A (en) 1979-06-25

Family

ID=15414093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14672377A Pending JPS5479672A (en) 1977-12-07 1977-12-07 Temperature compensating electronic watch

Country Status (1)

Country Link
JP (1) JPS5479672A (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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