'A designer who wants a transistor to operate in the saturation region under all conditions often selects a base resistance that produces a current gain of 10. '
I don't understand what he's doing with the math (it's not complicated math but he's trying to illustrate an idea that I don't get).
- betaDC=Ic/Ib but we only have control over Ib so.. how has he computed Ic=2mA?
- Then he does Ib = 2mA/50 okay but then again the normal way would be to work out Ib first and multiply with the given BetaDC to work out Ic..
If he wants IcSat directly then that's at Vce=0 so you do Vcc/Rc = IcSat What's he doing in Link-2 (Link-1 is his reference ckt)