Binary in Electronic Circuits

  • The two logic values can be represented as voltage levels below and above a predefined level known as threshold
  • In a positive logic system, voltage level lowers than the threshold represent logic 0
    • Below threshold = 0 (false, no, etc)
    • Above threshold = 1 (true, yes, etc)
  • A negative logic system is the opposite
    • Below threshold = 1 (true, yes, etc)
    • Above threshold = 0 (false, no, etc)

Effects of applying logic 0

  • Logic 0 opens a switch and logic 1 closes a switch
  • Below is a complete switch controlled by the values of input x

Switch Circuits implementation

How is such a switch implemented in electronic circuits

  • Transistors are used as switches