JPS54139763A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS54139763A
JPS54139763A JP4810278A JP4810278A JPS54139763A JP S54139763 A JPS54139763 A JP S54139763A JP 4810278 A JP4810278 A JP 4810278A JP 4810278 A JP4810278 A JP 4810278A JP S54139763 A JPS54139763 A JP S54139763A
Authority
JP
Japan
Prior art keywords
voltage
transistor
integrated circuit
well
channel transistor
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
JP4810278A
Other languages
Japanese (ja)
Inventor
Masaaki Kato
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 JP4810278A priority Critical patent/JPS54139763A/en
Publication of JPS54139763A publication Critical patent/JPS54139763A/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
    • G04G19/08—Arrangements for preventing voltage drop due to overloading the power supply

Landscapes

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

Abstract

PURPOSE:To operate a watch integrated circuit normally when voltage drops by applying a positive potential to the P well of the N channel transistor of complementary type MOS transistors at the voltage drop thereby lowering the apparent threshold voltage. CONSTITUTION:When large current is flowed owing to driving, etc. of a step motor or speaker and the voltage being applied to the integrated circuit lowers, the control pulse of a P channel transistor T5 becomes of low level and the transistor T5 conducts. Then, the resistance of the P well side of the N channel transistor T4 forming the complementary type MOS transistors reduces and the P well potential of the transistor T4 becomes higher than the source side. Hence, the apparent threshold voltage of the transistor T4 lowers and the integrated circuit stably operates normally even when large current flows or voltage drops owing to the drop in battery voltage.
JP4810278A 1978-04-21 1978-04-21 Electronic watch Pending JPS54139763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4810278A JPS54139763A (en) 1978-04-21 1978-04-21 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4810278A JPS54139763A (en) 1978-04-21 1978-04-21 Electronic watch

Publications (1)

Publication Number Publication Date
JPS54139763A true JPS54139763A (en) 1979-10-30

Family

ID=12793944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4810278A Pending JPS54139763A (en) 1978-04-21 1978-04-21 Electronic watch

Country Status (1)

Country Link
JP (1) JPS54139763A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002302847A (en) * 2001-04-03 2002-10-18 Tsudakoma Corp Weft-holding device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002302847A (en) * 2001-04-03 2002-10-18 Tsudakoma Corp Weft-holding device

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