ok.if i would like to have a 10 times in gain.To pick components you actually need some targets in mind.
Gain?
Signal swing?
Output / input resistance?
From my datasheet, i can see Vbe(sat) but no Vbe(on). So is this the same?Pull up the data sheet for that transistor and look up the Vbe(on).
I am going to take the coward's way out. Assume Vbe(on) is between 0.6 and 0.7 volts. Now start playing with resistors until you get Vbe equal to 0.7 volts, and Vce greater than 0.7 volts.From my datasheet, i can see Vbe(sat) but no Vbe(on). So is this the same?
thank you.
your R3 means Rb or Rc on my circuit?Hint: base emitter to -5VDC resistance is β (transistor beta) X R3.
Does not make any sense.Hint: base emitter to -5VDC resistance is β (transistor beta) X R3.
Cutoff mode:can i said that when Vce is equal to Vcc means my transistor is in cutoff mode?
That looks good. You are in forward-active mode, which is where you have nice linear relationship Ic=β(Ib) for current gain.So for currently i vary my Rc value. And i get Vbe=0.66 and Vce = 2.45V. So could i say that i'm working in the correct result?
thanks.
How do i know whether it is in active mode? depends on the value for my Vce? What if my Vce = Vcc? Does it still in active mode?That looks good. You are in forward-active mode, which is where you have nice linear relationship Ic=β(Ib) for current gain.
I can give you the definition from the book.How do i know whether it is in active mode? depends on the value for my Vce? What if my Vce = Vcc? Does it still in active mode?
thanks.
Perhaps because you have dismissed it without studying it? I will explain in my next post.Does not make any sense.
your R3 means Rb or Rc on my circuit?
thanks.
Read this postAnother question is why i need to know the output or input resistance?