http://im34.gulfup.com/CzXfF.jpg

q4 - in the circuit shown what is the minimum RL that the invert can drive with out causing the output drop blew 4 V when Vi = 0V ?

i don't understand what he want in Q4

how i solve question 4 ?

 

I don't understand it either. In fact, I can't even read it.

 

I don't understand it either. In fact, I can't even read it.

i write the q4 ...
q4 - in the circuit shown what is the minimum RL that the invert can drive with out causing the output drop blew 4 V when Vi = 0V ?

 

OH, he wants you to provide the minumum resistance for RL which the inverter can drive without causing the output to drop below 4V when Vi=0. Vi is the input voltage to the inverter.

 

OH, he wants you to provide the minumum resistance for RL which the inverter can drive without causing the output to drop below 4V when Vi=0. Vi is the input voltage to the inverter.

ok
how i prove that ? do you know ?

 

Well, when the input voltage = 0V, is the transistor on or off? If it's on, then you need to derive an expression for output voltage with the transistor on. If it's off, then you need to derive an expression for the output voltage with the transistor off.

 

thank uuuuuuuuuuuuuuuuuuuuuuuuuu