GB306521A - Improvements in artificial lines for telegraphy and like purposes - Google Patents

Improvements in artificial lines for telegraphy and like purposes

Info

Publication number
GB306521A
GB306521A GB23966/28A GB2396628A GB306521A GB 306521 A GB306521 A GB 306521A GB 23966/28 A GB23966/28 A GB 23966/28A GB 2396628 A GB2396628 A GB 2396628A GB 306521 A GB306521 A GB 306521A
Authority
GB
United Kingdom
Prior art keywords
cable
artificial line
artificial
line
resistance
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
GB23966/28A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB306521A publication Critical patent/GB306521A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1407—Artificial lines or their setting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/40—Artificial lines; Networks simulating a line of certain length

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

306,521. Pupin, M. I. Feb. 24, 1928, [Convention date]. Artificial lines; duplex telegraphs.-Comprises an artificial line AL, Fig. 4, particularly for use with high-speed cable signals for which the inductance of the cable has an appreciable effect. The line is made up of sections comprising shunt .condensers 24, series inductances 11, and further series inductances 12 shunted by resistances 19. The Specification contains a mathematical discussion showing how the magnitudes of the impedances 11, 12, 19, 24 can be calculated so that the artificial line may simulate, throughout a given range of frequencies, the impedance of a cable 10; the experimental data required are the terminal resistance and reactance of a length of cable at two typical frequencies, and its capacity per unit length. Disturbances due to reflection of low-frequency signal components at the end of the cable are neutralized by termination of the artificial line AL in a variable condenser 29 and resistance 30. Sea earths 9, 8 are provided for the artificial line AL and transmitter 1, the sea earth 9 being balanced by means of an impedance 5 consisting of two inductances, one of which is shunted by resistance. The sections of the artificial line may be all equal or may be graded in groups representing different lengths of cable. It is stated that the invention makes possible such a high signal speed that valve amplifiers can be advantageously used on the receiver.
GB23966/28A 1928-02-24 1928-08-20 Improvements in artificial lines for telegraphy and like purposes Expired GB306521A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US306521XA 1928-02-24 1928-02-24
US256571A US1834735A (en) 1928-02-24 1928-02-24 Inductive artificial line

Publications (1)

Publication Number Publication Date
GB306521A true GB306521A (en) 1929-12-20

Family

ID=34742452

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23966/28A Expired GB306521A (en) 1928-02-24 1928-08-20 Improvements in artificial lines for telegraphy and like purposes

Country Status (4)

Country Link
US (1) US1834735A (en)
DE (1) DE528830C (en)
FR (1) FR670232A (en)
GB (1) GB306521A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9636262B2 (en) 2014-06-26 2017-05-02 The Procter & Gamble Company Method and apparatus for transferring a discrete substrate

Also Published As

Publication number Publication date
US1834735A (en) 1931-12-01
DE528830C (en) 1931-07-07
FR670232A (en) 1929-11-26

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