Small Signal

Approximates the behaviour of a non-linear circuit using a Linear Circuit model for small variations in input signals.

  • small signal voltage:
  • small signal current:

Small Signal Resistance

Small Signal Resistance (r)

Ratio of a small change in applied Voltage to the resulting change in Current through the device.

  • also known as incremental or dynamic resistance

Small Signal Current Gain

Small Signal Current Gain ()

Ratio of a small change in applied Current to the resulting change in Current through the device.