Electronic – ICEO, ICBO physical interpretation in BJT


I am stuck with the equation:

ICEO = (1+β) ICBO

My questions are:

  1. What is the physical interpretation of this equation?
  2. Will both the currents exist simultaneously?
  3. Are any of the reverse currents getting amplified?

Best Answer

1/ ICBO is reverse leakage current going from the Collector to the Base. This current is then amplified by β to produce additional Collector current, thus the "1+β" term.

2/ Both currents exist simultaneously, but ICBO is included in ICEO.

3/ The reverse current ICBO is amplified, just like external Base current would be.