JPS5492782A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS5492782A
JPS5492782A JP16037477A JP16037477A JPS5492782A JP S5492782 A JPS5492782 A JP S5492782A JP 16037477 A JP16037477 A JP 16037477A JP 16037477 A JP16037477 A JP 16037477A JP S5492782 A JPS5492782 A JP S5492782A
Authority
JP
Japan
Prior art keywords
timer
frequency
frequency dividing
output
outputs
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
JP16037477A
Other languages
Japanese (ja)
Inventor
Hiroshi Yasuda
Yoshikazu Akaha
Shinji Morozumi
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 JP16037477A priority Critical patent/JPS5492782A/en
Publication of JPS5492782A publication Critical patent/JPS5492782A/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)

Abstract

PURPOSE:To correct the temperature at high precision, by detecting the frequency difference in oscillation output of two sets of oscillators as a beat signal, and correcting the frequency division output of a frequency divider accordingly. CONSTITUTION:A periodic difference proportional to the temperature of oscillation outputs of crystal oscillators 1, 2 is detected by a beat detector 5 as the beat of the two outputs, and counted by a counter 6. Whenever the counter 6 counts up to the specified number, it outputs a signal which resets a timer 7. A pulse correction circuit 8 which generates signal of specified time due to frequency dividing output of a frequency dividing circuit 9 through this timer 7 will correct the specified number of pulses for 1 pulse outputted from the circuit 5 with rspect to the frequency dividing output of the frequency dividing circuit 4. Therefore, according to the external setting of the timer period of the timer 7, the correction of temperature characeristic of a watch may be realized easily and at high precision. Besides, by picking up such discriminating signals, the precision of the watch may be measurd easily.
JP16037477A 1977-12-30 1977-12-30 Electronic watch Pending JPS5492782A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16037477A JPS5492782A (en) 1977-12-30 1977-12-30 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16037477A JPS5492782A (en) 1977-12-30 1977-12-30 Electronic watch

Publications (1)

Publication Number Publication Date
JPS5492782A true JPS5492782A (en) 1979-07-23

Family

ID=15713578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16037477A Pending JPS5492782A (en) 1977-12-30 1977-12-30 Electronic watch

Country Status (1)

Country Link
JP (1) JPS5492782A (en)

Similar Documents

Publication Publication Date Title
JPS5492782A (en) Electronic watch
HK46280A (en) Improvements in or relating to electronic timepieces
GB1100216A (en) Improvements relating to timepieces testers and methods
JPS55149090A (en) Temperature compensating system of crystal watch
US3857274A (en) Apparatus for rapidly evaluating the rate of a timekeeper
JPS5623024A (en) Frequency multiplication circuit
JPS5576978A (en) Temperature compensating circuit for electronic watch
JPS5485775A (en) Electronic watch
JPS56680A (en) Electronic clock
JPS6426164A (en) Speed detecting device
JPS5479686A (en) Time measuring apparatus
SU824115A1 (en) Electronic time-piece with time correction by time signals
SU559186A1 (en) Frequency Tag Shaper
JPS5587987A (en) Electronic watch
SU731414A1 (en) Electronic time-piece with reading correction
JPS5542054A (en) Watch with gas detector
JPS55101888A (en) Electronic watch
JPS53104277A (en) Electronic watch
SU600598A1 (en) Electronic device for tuning musical instruments
SU482692A1 (en) Signal frequency measuring device
JPS56137221A (en) Counting device for electronic degital weighing scale
JPS54140569A (en) Electronic watch
SU1191881A1 (en) Device for matching time scale of timepiece system with reference scale
SU446842A1 (en) Device for generating a measurement interval for digital frequency meters
SU905980A1 (en) Frequency multiplier