JPS5587078A - Electronic watch with automatic time correction - Google Patents

Electronic watch with automatic time correction

Info

Publication number
JPS5587078A
JPS5587078A JP15844578A JP15844578A JPS5587078A JP S5587078 A JPS5587078 A JP S5587078A JP 15844578 A JP15844578 A JP 15844578A JP 15844578 A JP15844578 A JP 15844578A JP S5587078 A JPS5587078 A JP S5587078A
Authority
JP
Japan
Prior art keywords
time
signal
circuit
time signal
correction
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
JP15844578A
Other languages
Japanese (ja)
Inventor
Nobuo Toyama
Junichi Yoshida
Shozo Yamano
Kenji Kamiya
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.)
Ricoh Elemex Corp
Ricoh Co Ltd
Original Assignee
Ricoh Elemex Corp
Ricoh Co 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 Ricoh Elemex Corp, Ricoh Co Ltd filed Critical Ricoh Elemex Corp
Priority to JP15844578A priority Critical patent/JPS5587078A/en
Publication of JPS5587078A publication Critical patent/JPS5587078A/en
Pending legal-status Critical Current

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  • Electromechanical Clocks (AREA)

Abstract

PURPOSE: To perform automatic correction with high reliability, by making accurate the discrimination of time signal, through the production of time correction signal after a given time elapsed from the leading time of normal time signal received with the time signal discrimination circuit.
CONSTITUTION: The correct time signal received is inputted to the Schmitt circuit 12 via BPF10 of the time signal discrimination circuit, and the circuit 12 produces the rectangular wave signal having the width from the leading of the correct time signal to the disappearance of the correct time signal, FF13 is set and the AND gate 14 is closed. Thus, clock is fed to the one minute timer 15 via the gate 14 and the time correction signal is fed to the counter circuit after one minute when the leading time of the received correct time signal to perform automatic time correction. On the other hand, the clock via the AND gate 16 opened with the pulse 2 from the circuit 12 is counted at the counter 17 and no time correction is made if the gate 16 is opened via the circuit 12 in response to noise with the reset of timer and FF13 before the duration period of correct time signal. Thus, the time signal can accurately be discriminated and automatic time correction with high reliability can be made.
COPYRIGHT: (C)1980,JPO&Japio
JP15844578A 1978-12-25 1978-12-25 Electronic watch with automatic time correction Pending JPS5587078A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15844578A JPS5587078A (en) 1978-12-25 1978-12-25 Electronic watch with automatic time correction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15844578A JPS5587078A (en) 1978-12-25 1978-12-25 Electronic watch with automatic time correction

Publications (1)

Publication Number Publication Date
JPS5587078A true JPS5587078A (en) 1980-07-01

Family

ID=15671911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15844578A Pending JPS5587078A (en) 1978-12-25 1978-12-25 Electronic watch with automatic time correction

Country Status (1)

Country Link
JP (1) JPS5587078A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04366787A (en) * 1991-06-13 1992-12-18 Iwatsu Electric Co Ltd time adjustment device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883866A (en) * 1972-02-07 1973-11-08
JPS50105168A (en) * 1974-01-25 1975-08-19

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883866A (en) * 1972-02-07 1973-11-08
JPS50105168A (en) * 1974-01-25 1975-08-19

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04366787A (en) * 1991-06-13 1992-12-18 Iwatsu Electric Co Ltd time adjustment device

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