The curves above this correspond to increasing levels of base current; each new base current stepping up a fixed amount for each subsequent trace (e.g., 0 μA, 10 μA, 20 μA, 30 \(\mu\...The curves above this correspond to increasing levels of base current; each new base current stepping up a fixed amount for each subsequent trace (e.g., 0 μA, 10 μA, 20 μA, 30 μA, etc.). This is due to the fact that the increased collector-emitter voltage is responsible for an increase in collector-base voltage (by definition, VCE=VCB+VBE). VCB is the reverse-bias potential on the collector-base PN junction.
