The load line
The load line contains every possible operating point for the circuit. A line is defined by two points. To draw the load line you have to get. the saturation point and the cutoff point:
Saturation point: Tells you the maximum possible collector current for the circuit.
Calculate: Visualize a short between the collector and emitter.
VCE --- > 0
Cutoff point : Tells you the maximum possible collector emitter voltage for the circuit. Calculate: Visualize the transistor internally open between collector and emitter.
Ex: Draw the load line for the given circuit.
VCE (cut) = VCC = 15V
HO: Suppose the collector resistance (in Fig. 4-1) is increased to 6KΩ. What happens to the dc load line?
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