JPS5570999A - Switching circuit for power supply of memory - Google Patents

Switching circuit for power supply of memory

Info

Publication number
JPS5570999A
JPS5570999A JP14371378A JP14371378A JPS5570999A JP S5570999 A JPS5570999 A JP S5570999A JP 14371378 A JP14371378 A JP 14371378A JP 14371378 A JP14371378 A JP 14371378A JP S5570999 A JPS5570999 A JP S5570999A
Authority
JP
Japan
Prior art keywords
power supply
circuit
memory
voltage
collector
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
JP14371378A
Other languages
Japanese (ja)
Other versions
JPS5936766B2 (en
Inventor
Tomoaki Irimichi
Shuichi Ninomiya
Sukeichi Miki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP53143713A priority Critical patent/JPS5936766B2/en
Publication of JPS5570999A publication Critical patent/JPS5570999A/en
Publication of JPS5936766B2 publication Critical patent/JPS5936766B2/en
Expired legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Landscapes

  • Stand-By Power Supply Arrangements (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Power Sources (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE: To reduce the unrequired power consumption from the memory power supply to the utmost, by backing up the power from the separate memory power supply from the applied voltage to the main circuit for the memory circuit, in the circuit providing main circuit and memory ciruit.
CONSTITUTION: The voltage of the power supply 23 is set greater than that of the power supply 24, and when the power supply switch 25 is closed, the diode D35 is biased reverse, and the voltage between the collector and emitter of the transistor TR28 is decreased nearly zero. Accordingly, since almost equal power supply voltage is fed to the first circuit 21 and the second circuit 22, normal operation is obtained. Next, when the switch 25 is open, the voltage subtracting the forward voltage drop of D35 from the DC sub-power supply 24 is fed to the first circuit 21 and the information of the first circuit 21 is kept holding as a result. In this case, no current flows from the base to the collector of TR28, and the leakage current from the emitter to the collector of TR28 can not almost flow.
COPYRIGHT: (C)1980,JPO&Japio
JP53143713A 1978-11-20 1978-11-20 Memory power supply switching circuit Expired JPS5936766B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53143713A JPS5936766B2 (en) 1978-11-20 1978-11-20 Memory power supply switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53143713A JPS5936766B2 (en) 1978-11-20 1978-11-20 Memory power supply switching circuit

Publications (2)

Publication Number Publication Date
JPS5570999A true JPS5570999A (en) 1980-05-28
JPS5936766B2 JPS5936766B2 (en) 1984-09-05

Family

ID=15345240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53143713A Expired JPS5936766B2 (en) 1978-11-20 1978-11-20 Memory power supply switching circuit

Country Status (1)

Country Link
JP (1) JPS5936766B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5047988A (en) * 1988-06-17 1991-09-10 Mitsubishi Denki Kabushiki Kaisha Disposable IC memory card having an embedded battery

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59148649U (en) * 1983-03-26 1984-10-04 矢野　利人 Chair

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5047988A (en) * 1988-06-17 1991-09-10 Mitsubishi Denki Kabushiki Kaisha Disposable IC memory card having an embedded battery

Also Published As

Publication number Publication date
JPS5936766B2 (en) 1984-09-05

Similar Documents

Publication Publication Date Title
JPS5570999A (en) Switching circuit for power supply of memory
JPS52147753A (en) Switching type dc stabilized power supply
JPS5313123A (en) Field circuit for dc motor
JPS5622117A (en) Electric power supply system for cmos memory circuit
JPS5518611A (en) Strobe circuit of camera
JPS57206946A (en) Cell backup circuit for memory
JPS5264830A (en) Power source supply system of integrated injection logical circuit
JPS5354909A (en) Cut-off circuit
JPS5441018A (en) Supply voltage control circuit incorporating monolithic ic
JPS5373327A (en) Power source system
JPS5597616A (en) Stabilizing power source for direct current
JPS5531296A (en) High voltage generator in monolithic ic
JPS5267275A (en) Semiconductor unit
JPS52116823A (en) Protection system for switching type dc stabilized power supply
JPS53118984A (en) Semiconductor switch
JPS5340845A (en) Protective circuit for short-circuit
JPS54158127A (en) Automatic white balance circuit
JPS5231357A (en) Chopper type dc power device
GB2007412A (en) Electronic flow presetter
JPS57119514A (en) Flip-flop circuit
JPS5335947A (en) Parallel control type voltage stabilizing circuit
JPS56164419A (en) Power supply circuit
JPS5329602A (en) Power supply connection circuit
JPS55142253A (en) Detecting circuit for fault in electric power source
JPS5482921A (en) Power supply unit