JPS52101905A - Parallel drive circuit in current switching scanning method - Google Patents

Parallel drive circuit in current switching scanning method

Info

Publication number
JPS52101905A
JPS52101905A JP1793176A JP1793176A JPS52101905A JP S52101905 A JPS52101905 A JP S52101905A JP 1793176 A JP1793176 A JP 1793176A JP 1793176 A JP1793176 A JP 1793176A JP S52101905 A JPS52101905 A JP S52101905A
Authority
JP
Japan
Prior art keywords
drive circuit
scanning method
current switching
parallel drive
switching scanning
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
JP1793176A
Other languages
Japanese (ja)
Other versions
JPS5439686B2 (en
Inventor
Isao Sato
Koji Inoue
Takao Ueno
Akira Ishizawa
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 JP1793176A priority Critical patent/JPS52101905A/en
Publication of JPS52101905A publication Critical patent/JPS52101905A/en
Publication of JPS5439686B2 publication Critical patent/JPS5439686B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

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

Abstract

PURPOSE:To prevent mis-detection of originating call due to blown fuse and to improve the reliability of the device by using a three-wire driving pulse transformer in an automatic telephone exchange.
JP1793176A 1976-02-23 1976-02-23 Parallel drive circuit in current switching scanning method Granted JPS52101905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1793176A JPS52101905A (en) 1976-02-23 1976-02-23 Parallel drive circuit in current switching scanning method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1793176A JPS52101905A (en) 1976-02-23 1976-02-23 Parallel drive circuit in current switching scanning method

Publications (2)

Publication Number Publication Date
JPS52101905A true JPS52101905A (en) 1977-08-26
JPS5439686B2 JPS5439686B2 (en) 1979-11-29

Family

ID=11957506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1793176A Granted JPS52101905A (en) 1976-02-23 1976-02-23 Parallel drive circuit in current switching scanning method

Country Status (1)

Country Link
JP (1) JPS52101905A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55158795A (en) * 1979-05-28 1980-12-10 Fujitsu Ltd Optical exchanger
JPS58170297A (en) * 1982-03-31 1983-10-06 Fujitsu Ltd Duplex scanning matrix circuit
JPS62198783U (en) * 1987-06-11 1987-12-17

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0357395Y2 (en) * 1986-07-28 1991-12-27

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55158795A (en) * 1979-05-28 1980-12-10 Fujitsu Ltd Optical exchanger
JPS58170297A (en) * 1982-03-31 1983-10-06 Fujitsu Ltd Duplex scanning matrix circuit
JPS62198783U (en) * 1987-06-11 1987-12-17

Also Published As

Publication number Publication date
JPS5439686B2 (en) 1979-11-29

Similar Documents

Publication Publication Date Title
ES267160Y (en) AN ELECTRICAL SWITCHING DEVICE.
GB1554214A (en) Power switching control circuit with enhanced turn-off device
JPS52101905A (en) Parallel drive circuit in current switching scanning method
JPS531452A (en) Current switching circuit
GB1553815A (en) Power switching circuit
IT1131255B (en) CURRENT DETECTION CIRCUIT COMPLEX FOR AN AUTOMATIC TELEPHONE SWITCHBOARD
JPS53144398A (en) Automatic polarity changing device of power source for electrophoresis
DE3870300D1 (en) ELECTRICAL POWER SUPPLY DEVICE BY OVERVOLTAGE.
JPS5374833A (en) Horizontal deflecting device
JPS5382422A (en) Light circuit switching device
JPS52101907A (en) Shunt type current switching scanning method
JPS54113832A (en) Inverter device
JPS53117922A (en) Absence reception voice answer skip system
JPS5340262A (en) Reverse turn-on stopping cir uit for two-way thyristor
JPS51115712A (en) Call detection method in automatic telephone exchange
JPS5355905A (en) Automatic dialing system
JPS52101904A (en) Auxiliary power supply switching type current switching scanning metho d
JPS56134897A (en) Detecting and display circuit for channel polarity
JPS53121516A (en) Display switching device
JPS5225560A (en) Gate signal feeding method of gto thyristor
JPS5235950A (en) Core memory unit driving circuit
JPS5214105A (en) Turbine controlling device
JPS52142905A (en) Control device of telephone call current supply
JPS53138031A (en) Power controller
KR840003515U (en) T.V power automatic circuit breaker