JPS57111708A - Voltage dividing and dropping circuit - Google Patents

Voltage dividing and dropping circuit

Info

Publication number
JPS57111708A
JPS57111708A JP18685780A JP18685780A JPS57111708A JP S57111708 A JPS57111708 A JP S57111708A JP 18685780 A JP18685780 A JP 18685780A JP 18685780 A JP18685780 A JP 18685780A JP S57111708 A JPS57111708 A JP S57111708A
Authority
JP
Japan
Prior art keywords
circuit
voltage
battery
output
capacitor
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
JP18685780A
Other languages
Japanese (ja)
Inventor
Fuminori Suzuki
Shingo Ichikawa
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.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch 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 Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP18685780A priority Critical patent/JPS57111708A/en
Priority to US06/328,990 priority patent/US4451743A/en
Priority to GB8138453A priority patent/GB2090483B/en
Publication of JPS57111708A publication Critical patent/JPS57111708A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

PURPOSE:To extend the life of the microcomputer for an electronic clock or the like using a C-MOS circuit and a small-size battery, by using the capacitor voltage dividing system of high conversion efficiency to obtain an optional output voltage. CONSTITUTION:A voltage dropping circuit 3 consists of a main capacitor 4, subcapacitors 4a and 4b, and switches 5a-5d and 6a-6d which make the connection relation between the capacitor 4 and subcapacitors 4a and 4b parallel or series. An electronic circuit 2 and a battery 1 are connected to this circuit 3, and the voltage of the battery 1 is detected by a voltage detecting circuit 9. The high level is outputted when the voltage of the battery 1 is high, and the low level is outputted when it is low; and when the voltage is high, the circuit 2 and the battery 1 are connected by a switch 7. When the voltage is low, the logic between the output of a switching pulse synthesizing circuit 8 of the circuit 2 and the detection output of the circuit 9 is operated by an AND gate 10 to output a switching pulse P, and switches 5a-5d and 6a-6d of the circuit 3 are controlled to apply a voltage charged in capacitors 4, 4a, and 4b to the circuit 2.
JP18685780A 1980-12-29 1980-12-29 Voltage dividing and dropping circuit Pending JPS57111708A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP18685780A JPS57111708A (en) 1980-12-29 1980-12-29 Voltage dividing and dropping circuit
US06/328,990 US4451743A (en) 1980-12-29 1981-12-09 DC-to-DC Voltage converter
GB8138453A GB2090483B (en) 1980-12-29 1981-12-21 Dc-to-dc voltage converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18685780A JPS57111708A (en) 1980-12-29 1980-12-29 Voltage dividing and dropping circuit

Publications (1)

Publication Number Publication Date
JPS57111708A true JPS57111708A (en) 1982-07-12

Family

ID=16195861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18685780A Pending JPS57111708A (en) 1980-12-29 1980-12-29 Voltage dividing and dropping circuit

Country Status (1)

Country Link
JP (1) JPS57111708A (en)

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