JPS5459825A - Power unit for device using volatile memory - Google Patents

Power unit for device using volatile memory

Info

Publication number
JPS5459825A
JPS5459825A JP12655877A JP12655877A JPS5459825A JP S5459825 A JPS5459825 A JP S5459825A JP 12655877 A JP12655877 A JP 12655877A JP 12655877 A JP12655877 A JP 12655877A JP S5459825 A JPS5459825 A JP S5459825A
Authority
JP
Japan
Prior art keywords
circuit
voltage
display
output
power
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
JP12655877A
Other languages
Japanese (ja)
Inventor
Yukinori Furuya
Hazama Yasue
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 JP12655877A priority Critical patent/JPS5459825A/en
Publication of JPS5459825A publication Critical patent/JPS5459825A/en
Pending legal-status Critical Current

Links

Classifications

    • Y02B60/1225—

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE: To ensure both the display of the stand-by state and the warning display for the voltage lowering of the battery in a simple way, by actuating the common display circuit with the detection output of two comparator circuits.
CONSTITUTION: Main power circuit 4 to supply the power to main circuit 3 is installed along with memory power circuit 5 to supply the power to memory circuit 6 containing the volatile memory. Then comparison 24 is given between the output voltage of circuit 4 and that of circuit 5. And in case only the output voltage of circuit 5 exists, the stand-by state is detected. At the same time, the voltage derived from the output voltage of circuit 5 is compared with the voltage of battery 16, and the comparator circuit comprising resistance 26, constant voltage diode 27 and transistor 28 produces the detection output when the voltage of battery 16 lowers less than the prescribed level. Thus, display circuit 29 is actuated by these two comparison output to ensure the common display
COPYRIGHT: (C)1979,JPO&Japio
JP12655877A 1977-10-20 1977-10-20 Power unit for device using volatile memory Pending JPS5459825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12655877A JPS5459825A (en) 1977-10-20 1977-10-20 Power unit for device using volatile memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12655877A JPS5459825A (en) 1977-10-20 1977-10-20 Power unit for device using volatile memory

Publications (1)

Publication Number Publication Date
JPS5459825A true JPS5459825A (en) 1979-05-14

Family

ID=14938129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12655877A Pending JPS5459825A (en) 1977-10-20 1977-10-20 Power unit for device using volatile memory

Country Status (1)

Country Link
JP (1) JPS5459825A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4953123A (en) * 1988-01-18 1990-08-28 Tokyo Keiki Company, Ltd. Memory system to perform data transfer by a contactless electromagnetic induction coupling system using induction coils

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4953123A (en) * 1988-01-18 1990-08-28 Tokyo Keiki Company, Ltd. Memory system to perform data transfer by a contactless electromagnetic induction coupling system using induction coils

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