JPS5486363A - State change detecting circuit - Google Patents

State change detecting circuit

Info

Publication number
JPS5486363A
JPS5486363A JP15352477A JP15352477A JPS5486363A JP S5486363 A JPS5486363 A JP S5486363A JP 15352477 A JP15352477 A JP 15352477A JP 15352477 A JP15352477 A JP 15352477A JP S5486363 A JPS5486363 A JP S5486363A
Authority
JP
Japan
Prior art keywords
circuit
state change
gate
gates
inputted
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.)
Granted
Application number
JP15352477A
Other languages
Japanese (ja)
Other versions
JPS6131917B2 (en
Inventor
Hiroshi Takizawa
Yusaku Yamada
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15352477A priority Critical patent/JPS5486363A/en
Publication of JPS5486363A publication Critical patent/JPS5486363A/en
Publication of JPS6131917B2 publication Critical patent/JPS6131917B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Testing And Monitoring For Control Systems (AREA)
  • Alarm Systems (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To obtain a circuit of a small size, low cost and yet good packaging efficiency by providing an assembly of exclusive-OR gates which convert plural external data to one state change information, differentiating the output thereof and setting which state change has occured in an FF circuit. CONSTITUTION:External data with each two pieces as one set are inputted to the exclusive-OR gate groups EOR11, EOR12... of the first stage and the outputs of the gates EOR11, EOR12... with each 2 pieces as 1 set are inputted to the exclusive-OR gate groups EOR21, EOR22... of the second stage. Finally the outputs of the gates EOR31 and EOR32 are inputted to the gate EOR41, whose output is then applied to the differentiation circuit C consisting of an inverter INV, capacitor Ca, resistance R and OR gate. The output of said differentiation circuit C is applied to an FF circuit D. Thereby, the detection circuit which is capable of detecting the contents of the state change of external data, is small and inexpensive and yet is of good packaging efficiency may be obtained.
JP15352477A 1977-12-22 1977-12-22 State change detecting circuit Granted JPS5486363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15352477A JPS5486363A (en) 1977-12-22 1977-12-22 State change detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15352477A JPS5486363A (en) 1977-12-22 1977-12-22 State change detecting circuit

Publications (2)

Publication Number Publication Date
JPS5486363A true JPS5486363A (en) 1979-07-09
JPS6131917B2 JPS6131917B2 (en) 1986-07-23

Family

ID=15564404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15352477A Granted JPS5486363A (en) 1977-12-22 1977-12-22 State change detecting circuit

Country Status (1)

Country Link
JP (1) JPS5486363A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001357471A (en) * 2000-06-15 2001-12-26 Nec Eng Ltd Warning collecting system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001357471A (en) * 2000-06-15 2001-12-26 Nec Eng Ltd Warning collecting system

Also Published As

Publication number Publication date
JPS6131917B2 (en) 1986-07-23

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