JPS5465577A - Ic for analog type electronic watches - Google Patents

Ic for analog type electronic watches

Info

Publication number
JPS5465577A
JPS5465577A JP13191877A JP13191877A JPS5465577A JP S5465577 A JPS5465577 A JP S5465577A JP 13191877 A JP13191877 A JP 13191877A JP 13191877 A JP13191877 A JP 13191877A JP S5465577 A JPS5465577 A JP S5465577A
Authority
JP
Japan
Prior art keywords
outputs
counter
period
thru
output
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
JP13191877A
Other languages
Japanese (ja)
Inventor
Takehiro Ishikawa
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 JP13191877A priority Critical patent/JPS5465577A/en
Publication of JPS5465577A publication Critical patent/JPS5465577A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To make ICs for 2-hand type and 3-hand type the same by providing control elements for a control circuit controlling the period of the drive pulses driving a converter and leading in the frequency divided outputs of different periods from frequency dividing stages through combination of their opening and closing thereby changing the drive pulse period. CONSTITUTION:Reference signal obtainable from a crystal oscillation circuit 1 is divided down in a frequency dividing circuit 2 and the output 1 Hz signal thereof is fed to an AND 16 and decimal counter 3. The time signal of the 10-second period being the output of the counter 3 is fed to an AND 17 and ternary counter 4. The time signal of the 30-second period being the output of the counter 4 is sent to an AND 18. Control switches 6, 7 are provided for the above and are connected to the NOR circuits 13 thru 15. By the ON-0FF conditions of the same, the outputs of the NOR circuits 13 thru 15 are changed. And the outputs thereof are connected to ANDs 16 thru 18, from which the outputs are inputted via OR circuit 19 to an FF 20, which in turn outputs the pluses for 1-second hand operation, 10-second hand operation and 30-second hand operation as drive pluses from H, I to a converter.
JP13191877A 1977-11-02 1977-11-02 Ic for analog type electronic watches Pending JPS5465577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13191877A JPS5465577A (en) 1977-11-02 1977-11-02 Ic for analog type electronic watches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13191877A JPS5465577A (en) 1977-11-02 1977-11-02 Ic for analog type electronic watches

Publications (1)

Publication Number Publication Date
JPS5465577A true JPS5465577A (en) 1979-05-26

Family

ID=15069226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13191877A Pending JPS5465577A (en) 1977-11-02 1977-11-02 Ic for analog type electronic watches

Country Status (1)

Country Link
JP (1) JPS5465577A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107276469A (en) * 2017-07-27 2017-10-20 深圳怡化电脑股份有限公司 The driving method and drive device of stepper motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107276469A (en) * 2017-07-27 2017-10-20 深圳怡化电脑股份有限公司 The driving method and drive device of stepper motor

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