JPS5792962A - Interface circuit - Google Patents

Interface circuit

Info

Publication number
JPS5792962A
JPS5792962A JP16750780A JP16750780A JPS5792962A JP S5792962 A JPS5792962 A JP S5792962A JP 16750780 A JP16750780 A JP 16750780A JP 16750780 A JP16750780 A JP 16750780A JP S5792962 A JPS5792962 A JP S5792962A
Authority
JP
Japan
Prior art keywords
switch
earth
diodes
lines
interface 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.)
Granted
Application number
JP16750780A
Other languages
Japanese (ja)
Other versions
JPS6325741B2 (en
Inventor
Osamu Uechi
Michinobu Ohata
Koji Mizushima
Katsuhiko Furukawa
Kouchi Ro
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 JP16750780A priority Critical patent/JPS5792962A/en
Publication of JPS5792962A publication Critical patent/JPS5792962A/en
Publication of JPS6325741B2 publication Critical patent/JPS6325741B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To cope with a power break, by connecting the output terminal of an electronic relay to the earth through a diode at the power break time. CONSTITUTION:Electronic relays 71-724 consisting of transistors for SR signal transmission and etc. are connected not only to SR lines CH1-CH24 but also to the earth through diodes D1-D24 and a common switch SW. In the normal operation, the switch SW is opened, and diodes D1-D24 are cut off for signals transmitted from respective electronic relays. When the local power source becomes faulty or broken by some cause, the switch SW is closed, and the earth is transmitted to all lines CH1-CH24 through type switch SW and respective diodes.
JP16750780A 1980-11-28 1980-11-28 Interface circuit Granted JPS5792962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16750780A JPS5792962A (en) 1980-11-28 1980-11-28 Interface circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16750780A JPS5792962A (en) 1980-11-28 1980-11-28 Interface circuit

Publications (2)

Publication Number Publication Date
JPS5792962A true JPS5792962A (en) 1982-06-09
JPS6325741B2 JPS6325741B2 (en) 1988-05-26

Family

ID=15850956

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16750780A Granted JPS5792962A (en) 1980-11-28 1980-11-28 Interface circuit

Country Status (1)

Country Link
JP (1) JPS5792962A (en)

Also Published As

Publication number Publication date
JPS6325741B2 (en) 1988-05-26

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