# Castilho

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bio website location age member for 1 year, 8 months seen Jan 24 at 20:04 profile views 19

Future electronic engineer, data fanatic, interested in computer vision, photography, web applications, low-level C & assembly hacking, microcontrollers, brazilian guitar and has recently been introduced to the benefits of a good ChimarrĂ£o while thinking.

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 Mar24 awarded Yearling Apr11 answered How to determine a system is stable using pole zero analysis? Apr9 revised What do you call the dynamic range of a variable gain amp? deleted 2271 characters in body Apr9 awarded Editor Apr9 revised S = VI*/2 derivation added 4122 characters in body Apr9 comment S = VI*/2 derivation I'll edit my answer to show what's the physical interpretation of Q ;). That's a topic that's not well covered in some circuit analysis books, it's worth mentioning Apr9 comment S = VI*/2 derivation almost that, the amount of I in the direction of V multiplied by V is the real power P, the amount of I perpendicular to V multiplied by V is the REACTIVE power Q, P+jQ is the complex power, or apparent power ;) Apr9 comment What do you call the dynamic range of a variable gain amp? read the questions: he's actually after the real definition of dynamic range. if you try to define it in every possible context, you'll run out of time and words Apr9 comment S = VI*/2 derivation Yep. you're right, that's NOT Q. The reactive power is defined only in terms of the phase difference between voltage and tension, and it's a value that's directly related to the definition of S as a phasor. It's the power that would be delivered by the current in quadrature with the voltage. The time varying component is not taken into account, because in this sense what really matters is the mean power at the load. The varying part EXISTS, is really there (watch a incandescent light bulb, for example), but, over time, the power is related only to the static part of s(t). ;) Apr9 comment What do you call the dynamic range of a variable gain amp? The problem is that he defines it as having to be calculated at maximum and minimum gain, and that just makes sense in one very specific context. That's the case of a sensor, but not the general case, and definitely, for me, not a "definition" per se Apr8 answered What do you call the dynamic range of a variable gain amp? Apr8 awarded Teacher Apr8 answered S = VI*/2 derivation Apr8 awarded Supporter