JPS5548678A - Automatic time correction device - Google Patents

Automatic time correction device

Info

Publication number
JPS5548678A
JPS5548678A JP12224878A JP12224878A JPS5548678A JP S5548678 A JPS5548678 A JP S5548678A JP 12224878 A JP12224878 A JP 12224878A JP 12224878 A JP12224878 A JP 12224878A JP S5548678 A JPS5548678 A JP S5548678A
Authority
JP
Japan
Prior art keywords
time
signal
gain
loss
circuit
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
JP12224878A
Other languages
Japanese (ja)
Inventor
Yasuo Kubo
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12224878A priority Critical patent/JPS5548678A/en
Publication of JPS5548678A publication Critical patent/JPS5548678A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R20/00—Setting the time according to the time information carried or implied by the radio signal
    • G04R20/14—Setting the time according to the time information carried or implied by the radio signal the radio signal being a telecommunication standard signal, e.g. GSM

Landscapes

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

Abstract

PURPOSE:To ensure an automatic time correction by having a comparison between the reference time signal detected from the ''117'' time signal service signal and the time signal given from the watch to indicate the time and then using the gain or loss signal according to the error time. CONSTITUTION:The time serivce signal obtained from the public telephone circuit is set to the level within the fixed range via level adjustment circuit 2 in order to detect second tone (a), forecast tone (b) and time signal tone (c) each. Based on the logic product of these detection tones, reference time detection circuit 6 detects the reference time signals every 30 seconds. Compared time detection circuit 7 supplies the time signal sent from counter 13 of the watch to detect the compared time signals every 00 second and 30 seconds. These detection signals are applied to error detection circuit 8 for comparison to decide the gain or loss of the watch, and the gain or loss signal is delivered from addition/subtraction counter circuit 9 in accordance with the error time. With this gain or loss signal the counting speed of counter 13 is controlled continuously to perform the continuous correction for the time.
JP12224878A 1978-10-03 1978-10-03 Automatic time correction device Pending JPS5548678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12224878A JPS5548678A (en) 1978-10-03 1978-10-03 Automatic time correction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12224878A JPS5548678A (en) 1978-10-03 1978-10-03 Automatic time correction device

Publications (1)

Publication Number Publication Date
JPS5548678A true JPS5548678A (en) 1980-04-07

Family

ID=14831253

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12224878A Pending JPS5548678A (en) 1978-10-03 1978-10-03 Automatic time correction device

Country Status (1)

Country Link
JP (1) JPS5548678A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57147783U (en) * 1981-03-13 1982-09-17
JPS582779A (en) * 1981-06-30 1983-01-08 Nec Corp Time correcting device
JPS59174784A (en) * 1983-03-25 1984-10-03 Nec Corp Time apparatus
JPS59174783A (en) * 1983-03-25 1984-10-03 Nec Corp Time apparatus
JPS61149891A (en) * 1984-12-24 1986-07-08 Nec Corp Time device
JP2007271522A (en) * 2006-03-31 2007-10-18 Rhythm Watch Co Ltd Automatically corrected timepiece

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57147783U (en) * 1981-03-13 1982-09-17
JPS582779A (en) * 1981-06-30 1983-01-08 Nec Corp Time correcting device
JPS6237354B2 (en) * 1981-06-30 1987-08-12 Nippon Electric Co
JPS59174784A (en) * 1983-03-25 1984-10-03 Nec Corp Time apparatus
JPS59174783A (en) * 1983-03-25 1984-10-03 Nec Corp Time apparatus
JPS61149891A (en) * 1984-12-24 1986-07-08 Nec Corp Time device
JP2007271522A (en) * 2006-03-31 2007-10-18 Rhythm Watch Co Ltd Automatically corrected timepiece

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