JPS5777986A - Detecting circuit for voltage - Google Patents

Detecting circuit for voltage

Info

Publication number
JPS5777986A
JPS5777986A JP56143504A JP14350481A JPS5777986A JP S5777986 A JPS5777986 A JP S5777986A JP 56143504 A JP56143504 A JP 56143504A JP 14350481 A JP14350481 A JP 14350481A JP S5777986 A JPS5777986 A JP S5777986A
Authority
JP
Japan
Prior art keywords
voltage
pulse
mos
multivibrator
width
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.)
Granted
Application number
JP56143504A
Other languages
Japanese (ja)
Other versions
JPS5917773B2 (en
Inventor
Hiroaki Fukuda
Takehiko Sasaki
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP56143504A priority Critical patent/JPS5917773B2/en
Publication of JPS5777986A publication Critical patent/JPS5777986A/en
Publication of JPS5917773B2 publication Critical patent/JPS5917773B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time-pieces
    • G04C10/04—Arrangements of electric power supplies in time-pieces with means for indicating the condition of the power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electronic Switches (AREA)
  • Electric Clocks (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE:To obtain a voltage-detecting circuit consuming little power, by triggering a C-MOS monostable multivibrator by means of a MOS nonstable multivibrator whose pulse width changes according to the service voltage and thereby controlling a D type flip-flop (FF). CONSTITUTION:The width of a pulse TA delivered by the MOS nonstable multivibrator AM formed of NOR gates G6 and G7, etc. of the voltage-detecting circuit changes according to the highness or lowness of the voltage of the secondary cell for clock charged by a solar cell. Meanwhile, the width of the output pulse of the C-MOS monostable multivibrator MM triggered by the rise of the pulse TA does not change. The outputs of the multivibrators AM and MM are impressed on the data terminal D and clock terminal C of the D type FF-FFD, respectively, and the width of the pulse TA from the multivibrator AM changing in accordance with the voltage is read out. And, based on the result of reading, the Q' output of FF-FFD is changed to be of high level or of low level, and thus the voltage of the cell or the like of the clock is detected with low consumption of power by small current.
JP56143504A 1981-09-10 1981-09-10 voltage detection circuit Expired JPS5917773B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56143504A JPS5917773B2 (en) 1981-09-10 1981-09-10 voltage detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56143504A JPS5917773B2 (en) 1981-09-10 1981-09-10 voltage detection circuit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP49031768A Division JPS626195B2 (en) 1974-03-19 1974-03-19

Publications (2)

Publication Number Publication Date
JPS5777986A true JPS5777986A (en) 1982-05-15
JPS5917773B2 JPS5917773B2 (en) 1984-04-23

Family

ID=15340259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56143504A Expired JPS5917773B2 (en) 1981-09-10 1981-09-10 voltage detection circuit

Country Status (1)

Country Link
JP (1) JPS5917773B2 (en)

Also Published As

Publication number Publication date
JPS5917773B2 (en) 1984-04-23

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