JPS5779747A - Coupling circuit - Google Patents

Coupling circuit

Info

Publication number
JPS5779747A
JPS5779747A JP15522180A JP15522180A JPS5779747A JP S5779747 A JPS5779747 A JP S5779747A JP 15522180 A JP15522180 A JP 15522180A JP 15522180 A JP15522180 A JP 15522180A JP S5779747 A JPS5779747 A JP S5779747A
Authority
JP
Japan
Prior art keywords
transmission
line
impedance
signal
constitution
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
JP15522180A
Other languages
Japanese (ja)
Inventor
Kazuo Oota
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15522180A priority Critical patent/JPS5779747A/en
Publication of JPS5779747A publication Critical patent/JPS5779747A/en
Pending 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)
  • Small-Scale Networks (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To prevent the lowering in the impedance of a bus transmission line, by constituting a transmission drive circuit which is interrupted other than signal transmission. CONSTITUTION:A stationary base bias voltage is not applied to a base terminal of a transmission transistor (TR)312, which turns on only when the modulation signal is positive. Thus, at the reception state where no modulation signal is applied to the base terminal, this TR312 is non-conductive and it is not a load to a bus transmission line 1. If data are transmitted from a master station not shown at this reception state, this signal is received at a receiver 303 with high input impedance. With the constitution like this, even if a plurality of terminals are connected to the line 1, since the transmission TR is non-conductive and the input impedance of the receiver is high, the impedance of the line 1 is not decreased.
JP15522180A 1980-11-06 1980-11-06 Coupling circuit Pending JPS5779747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15522180A JPS5779747A (en) 1980-11-06 1980-11-06 Coupling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15522180A JPS5779747A (en) 1980-11-06 1980-11-06 Coupling circuit

Publications (1)

Publication Number Publication Date
JPS5779747A true JPS5779747A (en) 1982-05-19

Family

ID=15601164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15522180A Pending JPS5779747A (en) 1980-11-06 1980-11-06 Coupling circuit

Country Status (1)

Country Link
JP (1) JPS5779747A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01286648A (en) * 1988-05-13 1989-11-17 Yamatake Honeywell Co Ltd Method for controlling half duplex channel driver
US7237571B2 (en) 2001-10-26 2007-07-03 Kyowa Hakko Kogyo Co., Ltd. Pulsating vibration air generation apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5087266A (en) * 1973-12-04 1975-07-14
JPS5427701A (en) * 1977-08-03 1979-03-02 Toshiba Corp Fail safe circuit of data transmitter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5087266A (en) * 1973-12-04 1975-07-14
JPS5427701A (en) * 1977-08-03 1979-03-02 Toshiba Corp Fail safe circuit of data transmitter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01286648A (en) * 1988-05-13 1989-11-17 Yamatake Honeywell Co Ltd Method for controlling half duplex channel driver
US7237571B2 (en) 2001-10-26 2007-07-03 Kyowa Hakko Kogyo Co., Ltd. Pulsating vibration air generation apparatus

Similar Documents

Publication Publication Date Title
US4527136A (en) Signal coupling apparatus
EP0204886A3 (en) Antenna for a radio transmitting and receiving apparatus
ES8503195A1 (en) Remote control system for electrical and electronic devices, especially for electronic consumer products.
DE3378501D1 (en) Modular circuit
EP0124260A3 (en) Power supply line carrier communication systems
JPS6411430A (en) Radio communication system
JPS56149148A (en) Signal transmission system
JPS5779747A (en) Coupling circuit
EP0322784A3 (en) Data transfer circuit
JPS56114450A (en) Signal transmission system
JPS5742248A (en) Switching device for communication system
JPS6459092A (en) Radar equipment
JPS5690655A (en) Wire transmission system
JPS57194611A (en) Branching and coupling circuit
JPS57106289A (en) Abnormality corresponding method on catv system
JPS56119557A (en) Communication mode switching system
JPS5724129A (en) Antenna circuit
ES543619A0 (en) IMPROVEMENTS AT A COUPLING LEVEL FOR THE COUPLING OF A SIGNAL DEVELOPING DEVICE WITH A TRANSMISSION CONDUCTOR
JPS56154847A (en) Connection system for transmission line
JPS553221A (en) Signal transmission/reception system
JPS56149154A (en) Transmission system for information on power failure
JPS57129045A (en) Two-way transmitting circuit
JPS5672570A (en) Facsimile communication system
JPS5755642A (en) Branch circuit communication system
IE45880L (en) Signal transmission