Yet another Op Amp question. Damn I hate these things

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Discussion Overview

The discussion revolves around solving a problem related to operational amplifiers (op-amps), specifically finding the voltages Vx and Vo in a given circuit. The scope includes conceptual understanding, problem-solving strategies, and technical explanations related to op-amp configurations and characteristics.

Discussion Character

  • Homework-related
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant requests the calculation of Vx and Vo based on a provided circuit diagram.
  • Another participant emphasizes the importance of showing work and understanding the problem rather than just recalling formulas.
  • A different participant suggests focusing on the core characteristics of op-amps to tackle more complex problems effectively.
  • It is proposed that identifying the configuration and mode of operation of the op-amp is crucial for solving the problem, along with accounting for resistances to derive expressions.
  • One participant provides a check on the calculation, indicating that Vo can be determined by the difference between Vplus and Vminus, which is influenced by a resistive divider.

Areas of Agreement / Disagreement

Participants generally agree on the importance of understanding the concepts behind op-amps and the need to show work in problem-solving. However, there are varying approaches suggested for tackling the problem, and no consensus on a specific solution is reached.

Contextual Notes

Some assumptions regarding the circuit configuration and the values of resistances are not explicitly stated, which may affect the clarity of the discussion. The discussion also does not resolve the mathematical steps needed to find Vx and Vo.

MushManG
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For the circuit below, find Vx and Vo.

http://www.freewebs.com/mushg/FWThumbnails/OpAmp.bmp
 
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MushManG said:
For the circuit below, find Vx and Vo.

http://www.freewebs.com/mushg/FWThumbnails/OpAmp.bmp

You need to show some work before we can help. What are your thoughts about this problem? Look at some of the examples (links) in this https://www.physicsforums.com/showthread.php?t=131943 to get some ideas of how to construct your post.
 
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I sugest you don't just remember the formula...try to understand the concept and the core characteristic...so that you can solve the harder problems...then you will love this thing.

Please see the attached for this problem and let me know if you have further questions.
Remember try to understand the concept...don't just try to remember it.:smile:
 

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Always start by identifying configuration/mode of operation the OP-AMP is working in.Then begin accounting for each resistance till you reduce it down to an expression...

An OP-AMP is basically a high gain amplifier...you'd do good to find out the gain since the output is essentially a magnified version of the input,either same phase or inverted...I'm just done with a whole semster of OP-AMP's and timers...it's not as bad as you think:)
 
Your answer

Sorry for the bad handwriting! LOL

To check: Basically Vo= Vplus-Vminus. The voltage at Vminus is set by the resistive divider. So is the voltage at Vx

Hope this helps. Op amps will save your life man. Just let 'em grow on you.
 
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