JPS5772090A - Electronic clock - Google Patents

Electronic clock

Info

Publication number
JPS5772090A
JPS5772090A JP8791681A JP8791681A JPS5772090A JP S5772090 A JPS5772090 A JP S5772090A JP 8791681 A JP8791681 A JP 8791681A JP 8791681 A JP8791681 A JP 8791681A JP S5772090 A JPS5772090 A JP S5772090A
Authority
JP
Japan
Prior art keywords
time
power
ticking
display part
power source
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
JP8791681A
Other languages
Japanese (ja)
Inventor
Hiroo Ishida
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
Matsushita Electric Industrial 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 Matsushita Electronics Corp, Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electronics Corp
Priority to JP8791681A priority Critical patent/JPS5772090A/en
Publication of JPS5772090A publication Critical patent/JPS5772090A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
    • G04G19/10—Arrangements for supplying back-up power

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To make it possible to continue time ticking operation without time adjustment at the power failure by using built-in DC power source for a time ticking part and using an AC power source for a display part. CONSTITUTION:The time ticking part 6, which is formed by one or more complementary MOS ICs and consumes a small amount of power, is driven by an exclusive battery 4. The display part 7 which employs numerical indicators such as LED and requires a large amount of power is driven by the power obtained by rectifying the current from the AC power source 8 by rectifying circuit 5. In this constitution, even through trouble such as power failure occurs, only the indication on the display part 7 disappears, but the time ticking operation is not affected by the trouble and the operation is continued. When the AC current is conducted again, since the time at that moment can be displayed, the time adjustment is not requured.
JP8791681A 1981-06-08 1981-06-08 Electronic clock Pending JPS5772090A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8791681A JPS5772090A (en) 1981-06-08 1981-06-08 Electronic clock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8791681A JPS5772090A (en) 1981-06-08 1981-06-08 Electronic clock

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP10053872A Division JPS5534390B2 (en) 1972-10-05 1972-10-05

Publications (1)

Publication Number Publication Date
JPS5772090A true JPS5772090A (en) 1982-05-06

Family

ID=13928239

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8791681A Pending JPS5772090A (en) 1981-06-08 1981-06-08 Electronic clock

Country Status (1)

Country Link
JP (1) JPS5772090A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958876A (en) * 1972-10-04 1974-06-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958876A (en) * 1972-10-04 1974-06-07

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