Hello everyone, can somebody with cascode amplifier

  • #1
434
19
Hello evervone can somebody help me, to calculate the cascade amplifier,

if somebody can tell me the formula? of to explain me? i am reading the book "electronics devices circuit and theory" page 201-202
i dont know how come the value 2.50v, 1.25v, 1,87v see the photo down...
1.png
 

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  • #2
berkeman
Mentor
58,774
8,903
I fixed your thread title to "cascode" amplifier, which I think is what you are asking about, right?

You should put the ground symbol at the bottom of your schematic so your bias voltages make more sense. And are you meaning to put the AC input signal into the base of Q2 and take the output at the collector of Q1?
 
  • #3
berkeman
Mentor
58,774
8,903
Also, for a cascode amplifier, you would typically use a decoupling capacitor on the base of Q1. Is anything like that shown in your book?
 
  • #5
434
19
Thanks anbbody, i made some bad calculations, now i undterstand....
so i fixed...
thanks to anbody for timeee.

greetings.
 

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