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Contaminated Ground

Discussion in 'General Electronics Discussion' started by MannaMan86, Dec 19, 2013.

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  1. MannaMan86

    MannaMan86

    19
    0
    Dec 9, 2013
    I have a circuit and the ground is getting contaminated by an inductive kick. Does anyone know what to contain ground in a circuit so that the voltage stays at zero?
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,497
    2,839
    Jan 21, 2010
    Your information is sparse, but I think you may be talking about ground bounce where your ground potential (on a board for example) ruses above the ground potential in other places (power supply).

    This is typically caused by large currents in your ground return. The cures are: (and there may be more)

    1) Use a heavier gauge wire

    2) separate the ground returns that carry high current and return them directly to your power supply.

    3) decouple your ground so that logic and power have independent grounds.

    4) reduce or eliminate the high current pulses which are causing your pain.
     
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