Voltage Gain Calculation for 2-Stage Amplifier

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SUMMARY

The voltage gain calculation for a 2-stage amplifier involves determining the gain for each stage using the formula Ao (Gain) = - Rf/R1. The first stage yields a gain of -1.5, while the second stage results in a gain of -1.55. The overall voltage gain is calculated by multiplying the gains of both stages, resulting in a positive gain of 2.34. For accurate results, it is essential to multiply the voltage gains for each stage rather than adding them, unless converting to decibels.

PREREQUISITES
  • Understanding of operational amplifier configurations
  • Familiarity with voltage gain calculations
  • Knowledge of decibel conversions in electronics
  • Basic algebra for multiplication of gains
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  • Learn about decibel (dB) calculations and conversions
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Electronics students, audio engineers, and anyone involved in amplifier design and analysis will benefit from this discussion on voltage gain calculations for 2-stage amplifiers.

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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
 

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Any question?
 
Is this the correct method and answer?
 
Do I multiply or add the voltage gains for each step?
 
Vout/Vin=(Vout/Vx)*(Vx/Vin).
Sounds logical, doese it not?
 
Thank you, yes it does...
 
BigMan52 said:
Do I multiply or add the voltage gains for each step?
You can add if you go dB's.
Meantime, go with post 5.
 
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Thank you very much!
 

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