JPS5728447A - Bipolar signal switching circuit - Google Patents

Bipolar signal switching circuit

Info

Publication number
JPS5728447A
JPS5728447A JP10324780A JP10324780A JPS5728447A JP S5728447 A JPS5728447 A JP S5728447A JP 10324780 A JP10324780 A JP 10324780A JP 10324780 A JP10324780 A JP 10324780A JP S5728447 A JPS5728447 A JP S5728447A
Authority
JP
Japan
Prior art keywords
relay
state
existing
spare
bipolar
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.)
Pending
Application number
JP10324780A
Other languages
Japanese (ja)
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 JP10324780A priority Critical patent/JPS5728447A/en
Publication of JPS5728447A publication Critical patent/JPS5728447A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To avoid momentary interruption or overlapping of bipolar signals at switching to a spare system, by providing a bipolar signal transmitter having a function outputting the bipolar signals when a PCM signal is inputted, in the form of existing and spare systems. CONSTITUTION:When an existing set 11 is in failure, the switching instruction information of existing and spare sets is applied to a control circuit 31 to apply a switching signal to the control circuit 31 and a hysteresis circuit 32. After the hysteresis circuit 32 turns on a contact SW2 of a relay 22 first, the off-state of an electronic switch 16 and the on-state of an electronic switch 26 are controlled at the same time and the contact of a relay 12 is made to off-state. The operating time of the electronic switches 16, 26 is several ns-several tens of ns, and no short break is caused even to high-speed bipolar signals. Since waveform is deteriorated due to stray capacitance when an output transformer 15 is connected to an output terminal 43, complete disconnection is made with the relay 12.
JP10324780A 1980-07-26 1980-07-26 Bipolar signal switching circuit Pending JPS5728447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10324780A JPS5728447A (en) 1980-07-26 1980-07-26 Bipolar signal switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10324780A JPS5728447A (en) 1980-07-26 1980-07-26 Bipolar signal switching circuit

Publications (1)

Publication Number Publication Date
JPS5728447A true JPS5728447A (en) 1982-02-16

Family

ID=14349105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10324780A Pending JPS5728447A (en) 1980-07-26 1980-07-26 Bipolar signal switching circuit

Country Status (1)

Country Link
JP (1) JPS5728447A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138220A (en) * 1990-12-05 1992-08-11 Science Applications International Corporation Field emission cathode of bio-molecular or semiconductor-metal eutectic composite microstructures
US5495143A (en) * 1993-08-12 1996-02-27 Science Applications International Corporation Gas discharge device having a field emitter array with microscopic emitter elements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138220A (en) * 1990-12-05 1992-08-11 Science Applications International Corporation Field emission cathode of bio-molecular or semiconductor-metal eutectic composite microstructures
US5495143A (en) * 1993-08-12 1996-02-27 Science Applications International Corporation Gas discharge device having a field emitter array with microscopic emitter elements

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