Digital Logic Gates

The OR Gate

  1. TheStandard Digital symbol for the OR gate is:

    [or1.gif]


  2. An OR gate can have 2 or more inputs and a single output.
  3. A plus sign (+) is used to signify the logical OR function.
  4. The output for thr OR gate pictured is R = L+N. This is read as, R equals L OR N.
  5. The OR gate output is binary 1 if any one or all of the inputs are binary 1.
  6. The OR gate output is binary 0 only when all inputs are binary 0.
  7. A common Truth Table for the OR gate:

    [1ttor1.gif]