JPS55156458A - Bipolar signal switching circuit - Google Patents

Bipolar signal switching circuit

Info

Publication number
JPS55156458A
JPS55156458A JP6514079A JP6514079A JPS55156458A JP S55156458 A JPS55156458 A JP S55156458A JP 6514079 A JP6514079 A JP 6514079A JP 6514079 A JP6514079 A JP 6514079A JP S55156458 A JPS55156458 A JP S55156458A
Authority
JP
Japan
Prior art keywords
transistor
stand
signals
transistors
held
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
JP6514079A
Other languages
Japanese (ja)
Other versions
JPS6033328B2 (en
Inventor
Kazuo Ogawa
Eiji Suzuki
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 JP54065140A priority Critical patent/JPS6033328B2/en
Publication of JPS55156458A publication Critical patent/JPS55156458A/en
Publication of JPS6033328B2 publication Critical patent/JPS6033328B2/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)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To make it possible to change an in-use transmitter of hot stand-by constitution, sending out a bipolar signal, over to a stand-by transmitter or vice versa at a high speed. CONSTITUTION:While signals A and A' are applied to bases of transistors 14 and 16, signals B and B' are applied to bases of transistors 15 and 17 and while control signal C applied to the base of transistor 18 is held at a high level, control signal C' applied to the base of transistor 19 is held at a low level. As a result, output OUT1 of the secondary side of an output transistor is a bipolar signal, but since stand-by transmitter 12 has transistor 19 cut off, transistors 16 and 17 are also cut off by signals A' and B', and consequently impedance viewed from the secondary side of output transistor 21 is infinite, exerting no influence on the amplitude of OUT1. Control signals C and C' are held in level reversely, so that the in-use side will be changed over to the stand-by side.
JP54065140A 1979-05-25 1979-05-25 Bipolar signal switching circuit Expired JPS6033328B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54065140A JPS6033328B2 (en) 1979-05-25 1979-05-25 Bipolar signal switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54065140A JPS6033328B2 (en) 1979-05-25 1979-05-25 Bipolar signal switching circuit

Publications (2)

Publication Number Publication Date
JPS55156458A true JPS55156458A (en) 1980-12-05
JPS6033328B2 JPS6033328B2 (en) 1985-08-02

Family

ID=13278276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54065140A Expired JPS6033328B2 (en) 1979-05-25 1979-05-25 Bipolar signal switching circuit

Country Status (1)

Country Link
JP (1) JPS6033328B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4719756A (en) * 1971-02-12 1972-09-25
JPS52115610A (en) * 1976-03-25 1977-09-28 Toshiba Corp Signal transmission circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4719756A (en) * 1971-02-12 1972-09-25
JPS52115610A (en) * 1976-03-25 1977-09-28 Toshiba Corp Signal transmission circuit

Also Published As

Publication number Publication date
JPS6033328B2 (en) 1985-08-02

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