Search the forum,

balanced

In telecommunications and professional audio, a balanced line or balanced signal pair is a circuit consisting of two conductors of the same type, each of which have equal impedances along their lengths and equal impedances to ground and to other circuits. The chief advantage of the balanced line format is good rejection of common-mode noise and interference when fed to a differential device such as a transformer or differential amplifier. Common forms of balanced line are twin-lead, used for radio frequency signals and twisted pair, used for lower frequencies. They are to be contrasted to unbalanced lines, such as coaxial cable, which is designed to have its return conductor connected to ground, or circuits whose return conductor actually is ground (see earth-return telegraph). Balanced and unbalanced circuits can be interfaced using a device called a balun.
Circuits driving balanced lines must themselves be balanced to maintain the benefits of balance. This may be achieved by transformer coupling (repeating coils) or by merely balancing the impedance in each conductor.
Lines carrying symmetric signals (those with equal amplitudes but opposite polarities on each leg) are often incorrectly referred to as "balanced", but this is actually differential signaling. Balanced lines and differential signaling are often used together, but they are not the same thing. Differential signaling does not make a line balanced, nor does noise rejection in balanced cables require differential signaling.

View More On Wikipedia.org
Recent contents Top users
  • Dan
    50

    Dan

    Administrator From On the forum.
    • Messages
      2,780
    • Directory
      6
    • Reaction score
      1,222
    • Points
      113
  • S
    2

    Sent1981

    From East anglia
    • Messages
      5
    • Reaction score
      0
    • Points
      1
  • P
    1

    pipcart

    • Messages
      4
    • Reaction score
      0
    • Points
      1
  • NODDYNODSVILLE
    1

    NODDYNODSVILLE

    • Messages
      35
    • Reaction score
      6
    • Points
      8
  • MikeJhn
    1

    MikeJhn

    • Messages
      195
    • Reaction score
      60
    • Points
      28
  • P
    1

    Poiuytr

    From Norwich
    • Messages
      27
    • Reaction score
      8
    • Points
      3
  • Riley
    1

    Riley

    Super Moderator From Sarf Coast
    • Messages
      10,855
    • Reaction score
      5,035
    • Points
      113
  • C
    1

    ColinB

    From Derbyshire UK
    • Messages
      1
    • Reaction score
      0
    • Points
      1
  • M
    1

    Matt0029

    36 From leeds
    • Messages
      1,137
    • Reaction score
      105
    • Points
      63
  • Zach054
    1

    Zach054

    From Manchester
    • Messages
      11
    • Reaction score
      1
    • Points
      3
  • T
    1

    topman870

    • Messages
      18
    • Reaction score
      0
    • Points
      1
  • A
    1

    armyash

    From Kent
    • Messages
      2,653
    • Reaction score
      699
    • Points
      113
  • finchy01
    1

    finchy01

    Plumbers Arms member From Farnham. Surrey
    • Messages
      194
    • Reaction score
      24
    • Points
      18
    • Creating content since 2001. Untold Media.

    Newest Plumbing Threads

    Back
    Top
    AdBlock Detected

    We get it, advertisements are annoying!

    Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

    I've Disabled AdBlock