Other Components

Transistor (2)

  • IE = IC + IB;  Large collector current is controlled by small base current giving gain (amplification)
  • Current gain (β – Beta) is the ratio of change in collector current for change in base current
  • β can be 500 or more
  • Note:  For PNP transistor voltages and currents must be reversed.  Arrowhead on symbol shows direction of conventional current flow