1. chandu13

    Thread Starter Member

    Oct 15, 2008
    22
    0
    Hay
    I am facing grounding problems
    In my application I am using 3.3vfor micro controller (DGND1), 5V for digital (DGND) & analog circuit (AGND), 12V proportional solenoids (12VGND) & 24V for Solenoids (24VGND)
    I am getting these voltage from 5V, 12V, 24V SMPS
    My doubt is how to connect all these ground points in the Circuit.
    I got some information from the Internet; AGND & DGND can connect with Inductor
    Please provide some information regarding the Ground.

    Regards
    Chandu
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    The power supply has all the voltage grounds made internally - no need to treat them as separate entities.

    For suggestions on the analog and digital ground, Google the term "star grounding". Here is one link that is good, even if it confines itself to audio amps - http://www.epanorama.net/documents/groundloop/.
     
    Last edited: Feb 11, 2009
  3. chandu13

    Thread Starter Member

    Oct 15, 2008
    22
    0
    Thanks for the reply

    In my circuits I made 3.3V, 5V, 12V, 24V ground lines separately
    I am planning to connect all separate grounds with main ground using 600 Ohms, 1500mA Ferrite Bead Chips to avoid the back flow current from other circuits. Here I have 5,12,24V power supplys, shall I connect all these Power supply grounds at single point, shall I call it as main ground.

    Please provide some information or circuits related to mixed signal grounds.

    Regards
    Chandu
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Google is your friend.
     
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