Finding R for Ideal Op Amp to Avoid Saturation

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SUMMARY

The discussion focuses on determining the range of resistance values (R) for an ideal operational amplifier (op amp) to avoid saturation at ±14V. The key equation derived is based on the principle that V+ equals V- for an ideal op amp, which is essential for calculating the appropriate resistance values. The user initially attempted to formulate the equation but faced challenges with clarity and accuracy. The community emphasized the importance of correctly setting up the voltage divider equations to find the acceptable range of R.

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  • Understanding of ideal operational amplifier characteristics
  • Knowledge of voltage divider circuits
  • Familiarity with basic circuit analysis
  • Proficiency in algebraic manipulation of equations
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weedannycool
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Homework Statement


if the op amp satuates at +-14v, determne te the range of values of risitance R for which the op amp does not saturate. Assume the op amp is idal

Homework Equations



V-=V+

The Attempt at a Solution



this is wa i have so far: (2-5/3)+(2-+14/R). not sure if it is right? COuld some1 help me solve this ?
 

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The risistor after the power sorce is a mistake so ignore. thanks
 
weedannycool said:

Homework Statement


if the op amp satuates at +-14v, determne te the range of values of risitance R for which the op amp does not saturate. Assume the op amp is idal

Homework Equations



V-=V+

The Attempt at a Solution



this is wa i have so far: (2-5/3)+(2-+14/R). not sure if it is right? COuld some1 help me solve this ?

Welcome to the PF. Could you please be a little more clear about how you derived the start of an equation above? There is at least one "-+" typo in it as well. And an equation needs to have an "=" sign in it, remember.

You have a voltage divider making the voltage at the V+ input, and a variable voltage divider connected to the V- pin. And you correctly state that V+ = V- for an ideal opamp. So that should help you calculate the range of R values that keep the output from reaching +/-14V.
 

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