GB755916A - Attenuation equalizers for electrical wave transmission systems - Google Patents

Attenuation equalizers for electrical wave transmission systems

Info

Publication number
GB755916A
GB755916A GB34062/54A GB3406254A GB755916A GB 755916 A GB755916 A GB 755916A GB 34062/54 A GB34062/54 A GB 34062/54A GB 3406254 A GB3406254 A GB 3406254A GB 755916 A GB755916 A GB 755916A
Authority
GB
United Kingdom
Prior art keywords
curve
network
resistance
nov
wave transmission
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
GB34062/54A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB755916A publication Critical patent/GB755916A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/143—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers
    • H04B3/145—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers variable equalisers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters And Equalizers (AREA)
  • Waveguide Connection Structure (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

755,916. Impedance networks. WESTERN ELECTRIC CO., Inc. Nov. 24, 1954 [Nov. 27 1953], No. 34062/54. Class 40 (8). An adjustable attenuation equalizer for use between a wave source 14 and a load Z L comprises input and output terminals 1, 2 and 3, 4, respectively, a resistance Rs, a terminating resistance Rx and a shaping network 7. The components of the network 7 are so chosen, and the Specification gives specific values, that the insertion loss - frequency curve, Fig. 2, is in the form of a parabola which is symmetrical about a frequency F M and the area 17 equals the combined area 18, 19. The curve shown is for a minimum value of Rx, for a maximum value the curve is a mirror image of the one shown; and for a normal setting of Rx the curve is a straight line at a value Ao. The network 7 may have an input impedance of constant resistance, and may be of lattice form (Fig. 3, not shown), or equivalent bridged-T (Figs. 4 to 7, not shown). Specification 469,067 is referred to.
GB34062/54A 1953-11-27 1954-11-24 Attenuation equalizers for electrical wave transmission systems Expired GB755916A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US394663A US2792552A (en) 1953-11-27 1953-11-27 Attenuation equalizer

Publications (1)

Publication Number Publication Date
GB755916A true GB755916A (en) 1956-08-29

Family

ID=23559893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34062/54A Expired GB755916A (en) 1953-11-27 1954-11-24 Attenuation equalizers for electrical wave transmission systems

Country Status (3)

Country Link
US (1) US2792552A (en)
FR (1) FR1108343A (en)
GB (1) GB755916A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096027A (en) * 1936-01-30 1937-10-19 Bell Telephone Labor Inc Attenuation equalizer
NL76851C (en) * 1943-04-07

Also Published As

Publication number Publication date
US2792552A (en) 1957-05-14
FR1108343A (en) 1956-01-11

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