Combing Return Paths DC Power Supplies

Discussion in 'General Electronics Chat' started by Annaconda, Dec 13, 2005.

  1. Annaconda

    Thread Starter New Member

    Dec 13, 2005
    1
    0
    Hi everyone. I have a triple source power supply and a single source power supply going into a PCB. Is it okay to combine the common legs/return paths of the triple and single supply, or do the two COMMs need to be kept separate? Thanks!
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    You probably need to keep them common. Unless you've got mixed digital and analog supplies. By keeping the grounds together, you know where current flow is pathed, and noise problems shouldn't arise.
     
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