# I have to make a circuits

Discussion in 'Homework Help' started by rio7, Jan 6, 2015.

1. ### rio7 Thread Starter Member

Jan 1, 2015
40
0
Good morning,

I have to make a amplifier circuits. I have: P(in) , Rload, Uin, Fž - Fa and Rin. How can I create stage ? I know first of all I must know the U' = ( Uin * Rin )/Rss + Rin.. But I don't have Rss... How can I do this job ?

2. ### Papabravo Expert

Feb 24, 2006
11,065
2,152
You start by showing us a diagram of what you have so far and then we help you with the parts you are stuck on.

3. ### rio7 Thread Starter Member

Jan 1, 2015
40
0
OK. Right now I do same of job..

I have this: U`=Uin´Rin/(Rsš+Rin).

1) U`= 0,1´1000/(2000+1000) = 0,033V

2) Pin= 0,0332/(2´1000) = 1,089´10-6/2 = 0,544´10-6W

3) Kp(stage)= Kp(1) ´ Kp(2) ´ Kp(3) ´ ... Kp(n-1) ´ Kp(n)

Kp(Stage)= 11/(2*0,544´10-6)= 10,11*106= 10110000 K.

4) When KpG 48/83/50/50

Kp(stage)(1) = 10110000/50 =202200;

Kp(stage)(2) = 202200/50 =3984;

Kp(stage)(3) = 3984/83 = 48;

Kp(stage)(4) = 48/48 = 1

I don't really understand from where these numbers ? Black bold.

4. ### djsfantasi AAC Fanatic!

Apr 11, 2010
3,486
1,245
Diagram? Schematic? Need these if you want help.

Jan 1, 2015
40
0
There it is:

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