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JPS5797128A - Power supply of data holding memory - Google Patents

Power supply of data holding memory

Info

Publication number
JPS5797128A
JPS5797128A JP55171895A JP17189580A JPS5797128A JP S5797128 A JPS5797128 A JP S5797128A JP 55171895 A JP55171895 A JP 55171895A JP 17189580 A JP17189580 A JP 17189580A JP S5797128 A JPS5797128 A JP S5797128A
Authority
JP
Japan
Prior art keywords
voltage
power supply
circuit
supply circuit
mpw
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
JP55171895A
Other languages
Japanese (ja)
Other versions
JPS6361689B2 (en
Inventor
Shuji Nishiyama
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.)
Denso Ten Ltd
Original Assignee
Denso Ten 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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP55171895A priority Critical patent/JPS5797128A/en
Publication of JPS5797128A publication Critical patent/JPS5797128A/en
Publication of JPS6361689B2 publication Critical patent/JPS6361689B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C5/00—Details of stores covered by group G11C11/00
    • G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
    • G11C5/141—Battery and back-up supplies

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Sources (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

PURPOSE:To simplify the constitution of a power supply circuit, by applying a certain level of voltage obtained based on the battery voltage which is made constant by a main power supply circuit and a Zener in the active and inactive states of control respectively to a data storage memory. CONSTITUTION:A control circuit mounted on a car includes a main power supply circuit MPW which regulates the battery voltage at a constant level and applies it to a microprocessor CPU, etc. plus a power supply circuit SPW which regulates the battery voltage at a constant level and applies it to a data holding memory M3. The circuit SPW applies the voltage obtained by regulating the output voltage VCC of the circuit MPW and the battery voltage at a cnstant level respectively by a Zener diode D1 to an input terminal of an operational amplifier OPA via diodes D3 and D2, and feeds the output voltage to the other input of the amplifier OPA. At the same time, the working voltage is supplied to the amplifier OPA from the battery. In such way, a certain level of voltage set based on the voltage VCC which is made constant by the circuit MPW and the voltage which is made constant by the diode D1 in the active inactive states respectively is supplied to the memory 3.
JP55171895A 1980-12-05 1980-12-05 Power supply of data holding memory Granted JPS5797128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55171895A JPS5797128A (en) 1980-12-05 1980-12-05 Power supply of data holding memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55171895A JPS5797128A (en) 1980-12-05 1980-12-05 Power supply of data holding memory

Publications (2)

Publication Number Publication Date
JPS5797128A true JPS5797128A (en) 1982-06-16
JPS6361689B2 JPS6361689B2 (en) 1988-11-30

Family

ID=15931793

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55171895A Granted JPS5797128A (en) 1980-12-05 1980-12-05 Power supply of data holding memory

Country Status (1)

Country Link
JP (1) JPS5797128A (en)

Also Published As

Publication number Publication date
JPS6361689B2 (en) 1988-11-30

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