help with LM311N Comparator

Discussion in 'Homework Help' started by hunterage2000, Apr 27, 2012.

  1. hunterage2000

    Thread Starter Senior Member

    May 2, 2010
    470
    1
    for an LM311N Comparator to work as a zero crossing detector, Should a 20k resistor be placed between VS+ and the output?
     
  2. MrChips

    Moderator

    Oct 2, 2009
    16,878
    5,195
    Yes. Definitely. Any thing from 1kΩ to 100kΩ depending on what you are driving.
     
  3. hunterage2000

    Thread Starter Senior Member

    May 2, 2010
    470
    1
    nice one mate, it works in multisim 11 but not 8 for some reason!
     
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