Where is the input

Discussion in 'General Electronics Chat' started by Schoen85, Jul 30, 2013.

  1. Schoen85

    Thread Starter New Member

    Jul 30, 2013

    I am new to circuit design and dont know if there is a reason for an output to be tied to another output in this manner. If you could tell me why the highlighted green line is connected to these gates but not to an input. I feel this has to be a mistake.

    I got this picture from here. The complete circuit describes a 7 seg display encoder.
  2. tshuck

    Well-Known Member

    Oct 18, 2012
    It would seem that the schematic you referenced has quite a few mistakes in it...