Obtain an expression for the fan-out F of the loaded a particular transistor inverter stage demonstrated below in terms of the minimum input logic HI voltage ViH min and another circuit parameters (don't form a substitution for ViH min into the derivation). While ViH min = 0.8VCC, find out the minimum value of the base resistor RB that will guarantee a fan-out of 10 while VBE sat = 0.8V and RC = 1kΩ as well VCC = 5V.
