- IE = IB + IC
- IC = IC majority + ICO minority
Collector current IC of the proportional relationship with the current IB IC = β IB. The greater the current of IB also current IC. Data specification transistor (from factory) in the set maximum value that should not be skipped in the operation. This specification provides limits of transistor operation in the series.
Common Base Configuration
At the bottom of the active region, where the emitter current IE = 0, collector currents flow only from behind the ICO the saturation value is very small (in the micro-ampere), so it can be ignored.
the cut-off is defined as the area where the current IC = 0 A. or indicate : "Regional cut-off occurs when Junction base-collector and base-emitter Junction in reverse bias."
Saturation region is a region where the value of a negative voltage VCB. or indicate: "Region is a region where saturation Junction base-collector and base-emitter Junction in forward bias."
In further analysis, when the transistor is in a condition "on", the assumed base-emitter voltage: