Basic connection of a transistor

  • Invented at Bell Labs in 1947
  • Device that acts either:
  • No moving parts
  • Acts like a switch
    • Either on or off
    • Takes a few nanoseconds to switch states
  • Made of a semiconductor material
  • Smaller than vacuum tubes and require less energy to operate
  • Three terminals
    • Source
      • Usually the output line
      • Source signal pulled to ground --> output signal is low
      • Source signal remains high --> output signal is high
    • Base
      • Regulates a gate determining whether source and ground connect
      • Base signal high --> source signal grounded
      • Base signal low --> source signal high
    • Emitter
      • Typically connected to ground

Computer Science Electricity