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JPS55161431A - Carrier wave current source switching circuit - Google Patents

Carrier wave current source switching circuit

Info

Publication number
JPS55161431A
JPS55161431A JP6886279A JP6886279A JPS55161431A JP S55161431 A JPS55161431 A JP S55161431A JP 6886279 A JP6886279 A JP 6886279A JP 6886279 A JP6886279 A JP 6886279A JP S55161431 A JPS55161431 A JP S55161431A
Authority
JP
Japan
Prior art keywords
circuit
carrier wave
relay
current source
switching
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
JP6886279A
Other languages
Japanese (ja)
Other versions
JPS5937620B2 (en
Inventor
Kazuhiko Nakamura
Jiyunji Funatsu
Mitsuo Otsuki
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP6886279A priority Critical patent/JPS5937620B2/en
Publication of JPS55161431A publication Critical patent/JPS55161431A/en
Publication of JPS5937620B2 publication Critical patent/JPS5937620B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To shorten the switching time to prevent the circuit from being affected by power source voltage fluctuation, by using an inverting circuit and a switching relay driving circuit having the quick-operating and slow-releasing characteristic for switching of the first and the second carrier wave current sources. CONSTITUTION:In case that the first carrier wave current source 100 is normal, inverting circuit 102 and switching relay driving circuits 103 and 108 are so set that the first switching relay 104 and the second switching relay 109 may be unoperated and operated respectively. In case that current source 100 becomes faulty, a state reverse to the normal state is set by operations of circuit 102 and 103 dependent upon the output of level detecting circuit 101. Circuit 108 has a delay characteristic for release of relay 109. Therefore, contact 110 of relay 109 is released after contact 105 of relay 104 is operated, and only the output current of the second carrier wave current source 107 is transmitted to output terminal 112, and both currents are not transmitted simultaneously.
JP6886279A 1979-06-04 1979-06-04 Carrier wave current source switching circuit Expired JPS5937620B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6886279A JPS5937620B2 (en) 1979-06-04 1979-06-04 Carrier wave current source switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6886279A JPS5937620B2 (en) 1979-06-04 1979-06-04 Carrier wave current source switching circuit

Publications (2)

Publication Number Publication Date
JPS55161431A true JPS55161431A (en) 1980-12-16
JPS5937620B2 JPS5937620B2 (en) 1984-09-11

Family

ID=13385894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6886279A Expired JPS5937620B2 (en) 1979-06-04 1979-06-04 Carrier wave current source switching circuit

Country Status (1)

Country Link
JP (1) JPS5937620B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01240021A (en) * 1988-03-22 1989-09-25 Nec Corp Transmission system switching equipment for multi-direction multiplex communication equipment
JPH02100352U (en) * 1989-01-26 1990-08-09

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01240021A (en) * 1988-03-22 1989-09-25 Nec Corp Transmission system switching equipment for multi-direction multiplex communication equipment
JPH02100352U (en) * 1989-01-26 1990-08-09

Also Published As

Publication number Publication date
JPS5937620B2 (en) 1984-09-11

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