JPS58142731U - Power supply circuit for backup of random access memory of microcomputer for automotive electronic equipment - Google Patents

Power supply circuit for backup of random access memory of microcomputer for automotive electronic equipment

Info

Publication number
JPS58142731U
JPS58142731U JP3587382U JP3587382U JPS58142731U JP S58142731 U JPS58142731 U JP S58142731U JP 3587382 U JP3587382 U JP 3587382U JP 3587382 U JP3587382 U JP 3587382U JP S58142731 U JPS58142731 U JP S58142731U
Authority
JP
Japan
Prior art keywords
random access
access memory
microcomputer
power supply
supply circuit
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
JP3587382U
Other languages
Japanese (ja)
Inventor
大楽　芳昭
Original Assignee
日本電子機器株式会社
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 日本電子機器株式会社 filed Critical 日本電子機器株式会社
Priority to JP3587382U priority Critical patent/JPS58142731U/en
Publication of JPS58142731U publication Critical patent/JPS58142731U/en
Pending legal-status Critical Current

Links

Landscapes

  • Power Sources (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Dc-Dc Converters (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図は本考案の一実施例を示す回路図である。 １・・・車載バッテリ、３・・・キースイッチ、４・・
・安定化電源、５・・・ダイオード、６・・・ＲＡＭ、
　７・・・スタンバイ端子、７′・・・通常電源端子、
８・・・抵抗、９・・・ツェナーダイオード、１０・・
・ダイオード、１１・・・コンデンサ。The figure is a circuit diagram showing an embodiment of the present invention. 1... Vehicle battery, 3... Key switch, 4...
・Stabilized power supply, 5...diode, 6...RAM,
7...standby terminal, 7'...normal power supply terminal,
8...Resistor, 9...Zener diode, 10...
・Diode, 11... Capacitor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 車載電子機器に使用されるマイクロコンピュータのラン
ダムアクセスメモリーに、バックアップ用電源として、
車載バッテリによりダイオードを介して充電されるコン
デンサの充放電端子を接続したことを特徴とする車載電
子機器用マイクロコンピュータのランダムアクセスメモ
リーのバックアップ用電源回路。As a backup power source for the random access memory of microcomputers used in in-vehicle electronic equipment,
A backup power supply circuit for a random access memory of a microcomputer for an on-vehicle electronic device, characterized in that a charging/discharging terminal of a capacitor charged by an on-board battery via a diode is connected.
JP3587382U 1982-03-16 1982-03-16 Power supply circuit for backup of random access memory of microcomputer for automotive electronic equipment Pending JPS58142731U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3587382U JPS58142731U (en) 1982-03-16 1982-03-16 Power supply circuit for backup of random access memory of microcomputer for automotive electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3587382U JPS58142731U (en) 1982-03-16 1982-03-16 Power supply circuit for backup of random access memory of microcomputer for automotive electronic equipment

Publications (1)

Publication Number Publication Date
JPS58142731U true JPS58142731U (en) 1983-09-26

Family

ID=30047335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3587382U Pending JPS58142731U (en) 1982-03-16 1982-03-16 Power supply circuit for backup of random access memory of microcomputer for automotive electronic equipment

Country Status (1)

Country Link
JP (1) JPS58142731U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02119735A (en) * 1988-10-31 1990-05-07 Ryobi Ltd Motor-driven reel
JP2015007852A (en) * 2013-06-25 2015-01-15 パナソニック株式会社 Power supply circuit of controller

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5738230B2 (en) * 1974-03-08 1982-08-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5738230B2 (en) * 1974-03-08 1982-08-14

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02119735A (en) * 1988-10-31 1990-05-07 Ryobi Ltd Motor-driven reel
JP2015007852A (en) * 2013-06-25 2015-01-15 パナソニック株式会社 Power supply circuit of controller

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