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GB995705A - Arrangement of a telegraphy circuit for double-current traffic - Google Patents

Arrangement of a telegraphy circuit for double-current traffic

Info

Publication number
GB995705A
GB995705A GB27492/63A GB2749263A GB995705A GB 995705 A GB995705 A GB 995705A GB 27492/63 A GB27492/63 A GB 27492/63A GB 2749263 A GB2749263 A GB 2749263A GB 995705 A GB995705 A GB 995705A
Authority
GB
United Kingdom
Prior art keywords
circuit
line
telegraphy
transistors
double
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.)
Expired
Application number
GB27492/63A
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.)
Tesla AS
Original Assignee
Tesla AS
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 Tesla AS filed Critical Tesla AS
Publication of GB995705A publication Critical patent/GB995705A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/661—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/20—Repeater circuits; Relay circuits
    • H04L25/24—Relay circuits using discharge tubes or semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

995,705. Telegraphy. TESLA NARODNI PODNIK. July 11, 1963 [July 30, 19621, No. 27492/63. Heading H4P. An output circuit for providing double current telegraph signals comprises two transistors and includes means for preventing an excessive voltage on the transistors. Such excess of voltage, or an open circuit line, can be indicated. The transistors T 1 , T 2 and resistors R 1 , R 2 form the arms of a bridge circuit, the batteries TB one diagonal and the telegraph line R z the other diagonal. Double current signals are obtained by variation of the base voltages. To prevent excessive voltage on the collectors the line R z is shunted by diodes D 1 , D 2 which are biased to TB volts. A relay P is energized if either D 1 or D 2 conducts, thereby indicating a fault in the circuit or an open circuit of line R z .
GB27492/63A 1962-07-30 1963-07-11 Arrangement of a telegraphy circuit for double-current traffic Expired GB995705A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS454662 1962-07-30

Publications (1)

Publication Number Publication Date
GB995705A true GB995705A (en) 1965-06-23

Family

ID=5457759

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27492/63A Expired GB995705A (en) 1962-07-30 1963-07-11 Arrangement of a telegraphy circuit for double-current traffic

Country Status (3)

Country Link
DE (1) DE1187668B (en)
GB (1) GB995705A (en)
NL (1) NL295175A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280243A1 (en) * 1974-07-23 1976-02-20 Trt Telecom Radio Electr FREQUENCY DEMODULATOR FOR A FREQUENCY SHIFT DATA TRANSMISSION SYSTEM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280243A1 (en) * 1974-07-23 1976-02-20 Trt Telecom Radio Electr FREQUENCY DEMODULATOR FOR A FREQUENCY SHIFT DATA TRANSMISSION SYSTEM

Also Published As

Publication number Publication date
NL295175A (en) 1965-04-26
DE1187668B (en) 1965-02-25

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