JPS5549091A - Information coding circuit - Google Patents

Information coding circuit

Info

Publication number
JPS5549091A
JPS5549091A JP12149578A JP12149578A JPS5549091A JP S5549091 A JPS5549091 A JP S5549091A JP 12149578 A JP12149578 A JP 12149578A JP 12149578 A JP12149578 A JP 12149578A JP S5549091 A JPS5549091 A JP S5549091A
Authority
JP
Japan
Prior art keywords
rows
columns
matrix
counter cnt
register reg
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
JP12149578A
Other languages
Japanese (ja)
Other versions
JPS6150414B2 (en
Inventor
Shiro Enami
Ryoichi Himeno
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
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone Corp
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, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP12149578A priority Critical patent/JPS5549091A/en
Publication of JPS5549091A publication Critical patent/JPS5549091A/en
Publication of JPS6150414B2 publication Critical patent/JPS6150414B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To miniaturize a unit with the number of multiplexers reduced by arranging supervisory contacts at intersections of a matrix, by performing sequencial sampling of rows of columns of the matrix, and by encoding outputs appearing on columns or rows. CONSTITUTION:Supervisory contacts (a00)-(a07), (a10)-(a17)... (a70)-(a77) are arranged on a matrix between decoder DEC connected to counter CNT of an information coding circuit which sends information out to a maintenance station by collecting and editing trouble information of a telephone switching facility and encoder ENC connected to register REG. Between encoder ENC and power supply +V, pull-up resistances R0-R7 are connected so as to apply clocks from counter CNT to the decoder through inverter INV, and outputs 0-7 of decoder DEC are outputted in sequence to rows of columns of the matrix. Then, register REG is triggered by the output of counter CNT to encode outputs appearing on rows or columns by encoder ENC, thereby setting coded signals to register REG.
JP12149578A 1978-10-04 1978-10-04 Information coding circuit Granted JPS5549091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12149578A JPS5549091A (en) 1978-10-04 1978-10-04 Information coding circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12149578A JPS5549091A (en) 1978-10-04 1978-10-04 Information coding circuit

Publications (2)

Publication Number Publication Date
JPS5549091A true JPS5549091A (en) 1980-04-08
JPS6150414B2 JPS6150414B2 (en) 1986-11-04

Family

ID=14812576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12149578A Granted JPS5549091A (en) 1978-10-04 1978-10-04 Information coding circuit

Country Status (1)

Country Link
JP (1) JPS5549091A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837233U (en) * 1981-09-01 1983-03-10 ティーオーエー株式会社 signal switching device
JPS63306718A (en) * 1987-06-08 1988-12-14 Nec Corp Serial access circuit
EP0380860A2 (en) * 1989-02-03 1990-08-08 Digital Equipment Corporation Self timed register file

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137754A (en) * 1974-04-20 1975-11-01
JPS5114533U (en) * 1974-07-19 1976-02-02

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137754A (en) * 1974-04-20 1975-11-01
JPS5114533U (en) * 1974-07-19 1976-02-02

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837233U (en) * 1981-09-01 1983-03-10 ティーオーエー株式会社 signal switching device
JPH028443Y2 (en) * 1981-09-01 1990-02-28
JPS63306718A (en) * 1987-06-08 1988-12-14 Nec Corp Serial access circuit
EP0380860A2 (en) * 1989-02-03 1990-08-08 Digital Equipment Corporation Self timed register file

Also Published As

Publication number Publication date
JPS6150414B2 (en) 1986-11-04

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