JPS56168246A - Power supply circuit - Google Patents

Power supply circuit

Info

Publication number
JPS56168246A
JPS56168246A JP7013780A JP7013780A JPS56168246A JP S56168246 A JPS56168246 A JP S56168246A JP 7013780 A JP7013780 A JP 7013780A JP 7013780 A JP7013780 A JP 7013780A JP S56168246 A JPS56168246 A JP S56168246A
Authority
JP
Japan
Prior art keywords
power source
source line
line
base
transistor
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
JP7013780A
Other languages
Japanese (ja)
Inventor
Tsuneo Baba
Tsukasa Igarashi
Osamu Yamamoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7013780A priority Critical patent/JPS56168246A/en
Publication of JPS56168246A publication Critical patent/JPS56168246A/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
    • G06F1/32—Means for saving power

Landscapes

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

Abstract

PURPOSE:To reduce the power consumption of an auxiliary power source at the service interruption by inserting another transistor in series to the base circuit of a transistor interposed between a main power source line and a main element power source line, and turning off the latter TR at the time of service interruption. CONSTITUTION:When a main power source line 1 is above the normal voltage, forward bias voltage is applied to the base of a transistor (TR) 11 and the TR11 goes on. Hence, a TR8 goes on and the line 1 is connected to a memory element power source line 3. When power source is interrupted, the TRs 8, 11 go off to disconnect the line 1. An auxiliary power source line 7 is connected via a diode 4 to a memory element power source line 3. At this time, positive voltage is applied to the collector of the TR8, but since the base circuit of this TR is held closed by the TR11, the current flowing from the collector to the base is cut off virtually perfectly.
JP7013780A 1980-05-28 1980-05-28 Power supply circuit Pending JPS56168246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7013780A JPS56168246A (en) 1980-05-28 1980-05-28 Power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7013780A JPS56168246A (en) 1980-05-28 1980-05-28 Power supply circuit

Publications (1)

Publication Number Publication Date
JPS56168246A true JPS56168246A (en) 1981-12-24

Family

ID=13422873

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7013780A Pending JPS56168246A (en) 1980-05-28 1980-05-28 Power supply circuit

Country Status (1)

Country Link
JP (1) JPS56168246A (en)

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