2 stage amplifier question

[BigMan52]

Homework Statement

Calculate the voltage gain for each stage and the overall voltage gain.

Homework Equations

Ao (Gain) = - Rf/R1
3. The Attempt at a Solution [/B]
For the first stage I got:
Gain = - 15/10 = - 1.5
For stage 2 I got:
Gain = -5.13.3 = -1.55
Multiplying the 2 together to get an overall positive gain of -1.5 x -1.55 = 2.34

 

[LvW]

Any question?

 

[BigMan52]

Is this the correct method and answer?

 

[BigMan52]

Do I multiply or add the voltage gains for each step?

 

[LvW]

Vout/Vin=(Vout/Vx)*(Vx/Vin).
Sounds logical, doese it not?

 

[BigMan52]

Thank you, yes it does...

 

[rude man]

Do I multiply or add the voltage gains for each step?

You can add if you go dB's.
Meantime, go with post 5.

 

[BigMan52]

Thank you very much!