GB1366261A - Digital data transmission system - Google Patents

Digital data transmission system

Info

Publication number
GB1366261A
GB1366261A GB438573A GB438573A GB1366261A GB 1366261 A GB1366261 A GB 1366261A GB 438573 A GB438573 A GB 438573A GB 438573 A GB438573 A GB 438573A GB 1366261 A GB1366261 A GB 1366261A
Authority
GB
United Kingdom
Prior art keywords
line
transformer
switchable
receiver
secondary winding
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
GB438573A
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.)
NCR Voyix Corp
National Cash Register Co
Original Assignee
NCR Corp
National Cash Register Co
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 NCR Corp, National Cash Register Co filed Critical NCR Corp
Publication of GB1366261A publication Critical patent/GB1366261A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0266—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
    • H04L25/0268—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling with modulation and subsequent demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Dc Digital Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

1366261 Digital transmission NATIONAL CASH REGISTER CO 29 Jan 1973 [14 Feb 1972] 4385/73 Heading H4P A transmitter includes a transformer 11 having a rectangular hysterisis loop, switchable by binary signals between first and second remanence states and providing pulses to a line connected to a receiver, Fig. 2, having a transformer 22 the secondary winding of which is coupled to a bi-stable circuit 36, 37 switchable by line signals from one state to another. The receiver transformer impedance matches that of the line. Diodes 25, 26 alternately clamp one side of secondary winding 24 to bias level when the other side is triggering the bi-stable circuit; this controls transistors 36, 37 providing a bipolar output. The reciever transformer impedance matches that of the line.
GB438573A 1972-02-14 1973-01-29 Digital data transmission system Expired GB1366261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22579372A 1972-02-14 1972-02-14

Publications (1)

Publication Number Publication Date
GB1366261A true GB1366261A (en) 1974-09-11

Family

ID=22846263

Family Applications (1)

Application Number Title Priority Date Filing Date
GB438573A Expired GB1366261A (en) 1972-02-14 1973-01-29 Digital data transmission system

Country Status (5)

Country Link
JP (1) JPS4894311A (en)
DE (1) DE2306681A1 (en)
FR (1) FR2172154B1 (en)
GB (1) GB1366261A (en)
NL (1) NL7301560A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4911413A (en) * 1972-05-30 1974-01-31
DE2736522C2 (en) * 1977-08-12 1979-05-31 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for transmitting data

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465101A (en) * 1966-04-18 1969-09-02 Collins Radio Co High speed inter-computer communication using narrow bandwidth twisted pair cable

Also Published As

Publication number Publication date
NL7301560A (en) 1973-08-16
DE2306681A1 (en) 1973-08-30
FR2172154B1 (en) 1978-03-03
FR2172154A1 (en) 1973-09-28
JPS4894311A (en) 1973-12-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee