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how_opamps_really_work [2018/10/09 20:08]
yehowshua
how_opamps_really_work [2018/10/09 20:17] (current)
yehowshua
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-The fundamental problem I have with the various explanation of OpAmps is that they claim OpAmps need feedback. Naturally, I was not very satisfied with this explanation. Why can't we use as class B BJT OpAmp? Well it turns out, that most transistors have inherent current variations that vary wildly with temperature. The natural linear region of transistors is also insufficiently small. After about an hour of struggling, I was finally able to show that the traditional feedback op amp with resistors Rf and Rg can stabilize as system that has a tendency to amplify, but not necessarily linearly. The implications extend beyond electronics and reach into the realm of mechanical systems and other systems I'm sure.+The fundamental problem I have with the various explanation of OpAmps is that they claim OpAmps need feedback. Naturally, I was not very satisfied with this explanation. Why can't we use an amplified without feedback? Well it turns out, that most transistors have inherent current variations that vary wildly with temperature. The natural linear region of transistors is also insufficiently small for many applications. After about an hour of struggling, I was finally able to show that the traditional feedback op amp with resistors Rf and Rg can stabilize as system that has a tendency to amplify, but not necessarily linearly. The implications extend beyond electronics and reach into the realm of mechanical systems and other systems I'm sure.
  
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  • how_opamps_really_work.txt
  • Last modified: 2018/10/09 20:17
  • by yehowshua