JPS5624621A - Fault voltage generating circuit - Google Patents

Fault voltage generating circuit

Info

Publication number
JPS5624621A
JPS5624621A JP9946779A JP9946779A JPS5624621A JP S5624621 A JPS5624621 A JP S5624621A JP 9946779 A JP9946779 A JP 9946779A JP 9946779 A JP9946779 A JP 9946779A JP S5624621 A JPS5624621 A JP S5624621A
Authority
JP
Japan
Prior art keywords
voltage
power source
circuit
generating circuit
feed back
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
JP9946779A
Other languages
Japanese (ja)
Inventor
Yoichiro Hashimoto
Seiji Watanuki
Yukio Akiyama
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 JP9946779A priority Critical patent/JPS5624621A/en
Publication of JPS5624621A publication Critical patent/JPS5624621A/en
Pending legal-status Critical Current

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  • Power Sources (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

PURPOSE: To shorten the transition time from on to off conditions and follow the change of the power source voltage of the computer by making the on and off conditions of two transistors of the fault voltage generating circuit at the same time different from each other.
CONSTITUTION: When during the current flow, the power source voltage is fed to the power source terminal 6 of the microcomputer 5 through the constant voltage circuit 10 from the power source circuit 3, the voltage is added to the fault voltage input terminal 7 through the fault voltage generating circuit 4. In this circuit 4, two transistors TR8, 9 and Zener diodes 11, 18 and voltage dividing resistances 12, 13 and a positive feed back resistance 17 and the like with respect to TR9. Then, the voltage is impressed to the circuit 4 from the power source circuit 3 the positive feed back is applied to TR9 to lower instantaneously the voltage of the input terminal 7 and prevent the voltage lowering of the power source terminal 6. Under the feed back condition, the output of the circuit 10 is raised to a predetermined number and added to the power source terminal 6 and at the same time, the voltage of the input terminal 7 is delayed from the voltage by TR8 to shorten the transition time from on to off.
COPYRIGHT: (C)1981,JPO&Japio
JP9946779A 1979-08-06 1979-08-06 Fault voltage generating circuit Pending JPS5624621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9946779A JPS5624621A (en) 1979-08-06 1979-08-06 Fault voltage generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9946779A JPS5624621A (en) 1979-08-06 1979-08-06 Fault voltage generating circuit

Publications (1)

Publication Number Publication Date
JPS5624621A true JPS5624621A (en) 1981-03-09

Family

ID=14248107

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9946779A Pending JPS5624621A (en) 1979-08-06 1979-08-06 Fault voltage generating circuit

Country Status (1)

Country Link
JP (1) JPS5624621A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100418706B1 (en) * 2001-12-29 2004-02-14 삼성전자주식회사 Computer system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100418706B1 (en) * 2001-12-29 2004-02-14 삼성전자주식회사 Computer system

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