JPS5659328A - Abnormality detection circuit for electric power source - Google Patents

Abnormality detection circuit for electric power source

Info

Publication number
JPS5659328A
JPS5659328A JP13420679A JP13420679A JPS5659328A JP S5659328 A JPS5659328 A JP S5659328A JP 13420679 A JP13420679 A JP 13420679A JP 13420679 A JP13420679 A JP 13420679A JP S5659328 A JPS5659328 A JP S5659328A
Authority
JP
Japan
Prior art keywords
power source
electric power
detection circuit
signal
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
JP13420679A
Other languages
Japanese (ja)
Inventor
Haruyoshi Takayama
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP13420679A priority Critical patent/JPS5659328A/en
Publication of JPS5659328A publication Critical patent/JPS5659328A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To prevent a malfunction by generating an interruption signal of the central processing unit (CPU) by a detection signal from the electric power source variation circuit, and without delay informing an abnormal and recovery of the electric power source to the CPU.
CONSTITUTION: An output signal 2 of the detection circuit 1 is input to the phase variation detection circuit 3. This phase variation detection circuit 3 detects a variation of the potential of the output signal 2, generates an interruption signal 4, and informs an abnormal of the electric power source to CPU5. When the electric power source has been recovered to its normal state, the potential of the output signal from the detection circuit 1 is varied opposite to its abnormal time, and the phase variation detection circuit 3 generates an interruption signal 4 and informs that the electric power source has been recovered to CPU5. In this regard, each circuit is backed up by the auxiliary electric power source 6.
COPYRIGHT: (C)1981,JPO&Japio
JP13420679A 1979-10-19 1979-10-19 Abnormality detection circuit for electric power source Pending JPS5659328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13420679A JPS5659328A (en) 1979-10-19 1979-10-19 Abnormality detection circuit for electric power source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13420679A JPS5659328A (en) 1979-10-19 1979-10-19 Abnormality detection circuit for electric power source

Publications (1)

Publication Number Publication Date
JPS5659328A true JPS5659328A (en) 1981-05-22

Family

ID=15122892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13420679A Pending JPS5659328A (en) 1979-10-19 1979-10-19 Abnormality detection circuit for electric power source

Country Status (1)

Country Link
JP (1) JPS5659328A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60207936A (en) * 1984-03-30 1985-10-19 Shin Meiwa Ind Co Ltd Abnormality processing equipment
JP2006133919A (en) * 2004-11-02 2006-05-25 Nec Micro Systems Ltd Semiconductor device and power source monitoring circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60207936A (en) * 1984-03-30 1985-10-19 Shin Meiwa Ind Co Ltd Abnormality processing equipment
JP2006133919A (en) * 2004-11-02 2006-05-25 Nec Micro Systems Ltd Semiconductor device and power source monitoring circuit

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