Draw an estimated input-output transfer characteristic for the loaded inverter circuit demonstrated below. Determine expressions for the output HI and LO logic voltages as well as the critical maximum input logic LO voltage ViL max. Obtain an expression for the critical minimum input logic HI voltage that is ViH min in terms of the circuit parameters. When VOH = 0.75VCC, find out the value of ViH min while RB = 10kΩ, RC = 1k?, βF = 40, VBE sat = 0.8V, VCE sat = 0.2V and VCC = 5V.
