JPS57147355A - Preventing circuit for faulty transmission - Google Patents

Preventing circuit for faulty transmission

Info

Publication number
JPS57147355A
JPS57147355A JP56032103A JP3210381A JPS57147355A JP S57147355 A JPS57147355 A JP S57147355A JP 56032103 A JP56032103 A JP 56032103A JP 3210381 A JP3210381 A JP 3210381A JP S57147355 A JPS57147355 A JP S57147355A
Authority
JP
Japan
Prior art keywords
voltage
oscillator
gate
transmission
power voltage
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
JP56032103A
Other languages
Japanese (ja)
Other versions
JPH0143498B2 (en
Inventor
Kazumi Ueda
Shuichi Akimoto
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 JP56032103A priority Critical patent/JPS57147355A/en
Publication of JPS57147355A publication Critical patent/JPS57147355A/en
Publication of JPH0143498B2 publication Critical patent/JPH0143498B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To prevent faulty transmission from a station to be monitored by monitoring the power voltage of a logical part for generation of a transmission start signal, and stopping the operation of an oscillator for modulation when the voltage drops below an IC operation ensuring voltage. CONSTITUTION:When a power voltage V1 is normal, an oscillator 1 for modulation starts oscillation and if a transmission start signal is supplied from a logical part 2 to a gate 5, a carrier signal is sent to a transmission line 7. If the power voltage V1 drops below the IC operation ensuring voltage of the logical part 2 set by resistances R5 and R6, a transistor TR1 turns off. Consequently, a capacitor C1 is discharged instantaneously through a diode D1 and a resistance R3 and a gate 10 turns on. Therefore, the oscillation of the oscillator 1 stops, so the logic part 2 operates unstably owing to the drop in voltage V1, preventing the carrier signal from being sent to the transmission line 7 even if the gate 5 is opened.
JP56032103A 1981-03-06 1981-03-06 Preventing circuit for faulty transmission Granted JPS57147355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56032103A JPS57147355A (en) 1981-03-06 1981-03-06 Preventing circuit for faulty transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56032103A JPS57147355A (en) 1981-03-06 1981-03-06 Preventing circuit for faulty transmission

Publications (2)

Publication Number Publication Date
JPS57147355A true JPS57147355A (en) 1982-09-11
JPH0143498B2 JPH0143498B2 (en) 1989-09-21

Family

ID=12349559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56032103A Granted JPS57147355A (en) 1981-03-06 1981-03-06 Preventing circuit for faulty transmission

Country Status (1)

Country Link
JP (1) JPS57147355A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045505A (en) * 1973-08-27 1975-04-23
JPS5129003A (en) * 1974-09-05 1976-03-11 Tokyo Electric Power Co

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045505A (en) * 1973-08-27 1975-04-23
JPS5129003A (en) * 1974-09-05 1976-03-11 Tokyo Electric Power Co

Also Published As

Publication number Publication date
JPH0143498B2 (en) 1989-09-21

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