JPS5757324A - Battery backup system of semiconductor storage device - Google Patents

Battery backup system of semiconductor storage device

Info

Publication number
JPS5757324A
JPS5757324A JP55132634A JP13263480A JPS5757324A JP S5757324 A JPS5757324 A JP S5757324A JP 55132634 A JP55132634 A JP 55132634A JP 13263480 A JP13263480 A JP 13263480A JP S5757324 A JPS5757324 A JP S5757324A
Authority
JP
Japan
Prior art keywords
battery
thyristor
turned
power source
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
JP55132634A
Other languages
Japanese (ja)
Inventor
Chuji Watabe
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55132634A priority Critical patent/JPS5757324A/en
Publication of JPS5757324A publication Critical patent/JPS5757324A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Static Random-Access Memory (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Power Sources (AREA)

Abstract

PURPOSE:To eliminate the insignificant discharge of a battery, by turning on a backup switch to invalidate backup when no AC power source is supplied to a semiconductor memory. CONSTITUTION:When a backup switch 15 is turned on with no supply of an AC power source, the output of a rectifying circuit 11 is set at zero. As a result, a thyristor 16 is turned off to cause no flow of discharged current from a battery 13. When the AC power supply is applied under such conditions, the thyristor 16 is turned on. However, no discharged current of the battery 13 flows since the voltage of the battery 13 is set at a low level. If the AC power source is broken at this moment, the output of the circuit 11 is reduced to flow the current supplied from the battery 13 to an output voltage control circuit 12 via the thyristor 16. As a result, the storage contents of a memory 17 are held. In such way, the insignificant discharge of a battery can be eliminated.
JP55132634A 1980-09-24 1980-09-24 Battery backup system of semiconductor storage device Pending JPS5757324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55132634A JPS5757324A (en) 1980-09-24 1980-09-24 Battery backup system of semiconductor storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55132634A JPS5757324A (en) 1980-09-24 1980-09-24 Battery backup system of semiconductor storage device

Publications (1)

Publication Number Publication Date
JPS5757324A true JPS5757324A (en) 1982-04-06

Family

ID=15085908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55132634A Pending JPS5757324A (en) 1980-09-24 1980-09-24 Battery backup system of semiconductor storage device

Country Status (1)

Country Link
JP (1) JPS5757324A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59186361A (en) * 1983-04-06 1984-10-23 Matsushita Electric Ind Co Ltd Nonvolatile semiconductor device
JPS6146128A (en) * 1984-08-09 1986-03-06 日本電信電話株式会社 Instantaneous power no interruption dc supply system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59186361A (en) * 1983-04-06 1984-10-23 Matsushita Electric Ind Co Ltd Nonvolatile semiconductor device
JPS6146128A (en) * 1984-08-09 1986-03-06 日本電信電話株式会社 Instantaneous power no interruption dc supply system

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