Timeline for Use Kirchhoffs circuit laws for op amps [duplicate]
Current License: CC BY-SA 3.0
8 events
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| Dec 15, 2015 at 5:02 | history | closed |
Daniel Grillo got trolled too much this week W5VO |
Duplicate of Solving an Op-amp circuit | |
| Dec 8, 2015 at 3:41 | comment | added | got trolled too much this week | There numerous free materials for this, e.g. op-amps for everyone or OCW/youtube lectures etc. In addition to what was said, you need to [preferably] solve his circuit in the s-domain because of the L and C. Come back when you have tried something. Also qsapecng can solve this; you can use it to check your work if this is homework or just get an answer otherwise. | |
| Dec 7, 2015 at 1:06 | comment | added | MarkU |
If you're modeling the op amp as an ideal op amp, then you can't apply KCL at the op amp output terminal, because you can't know how much current is flowing there -- all you can know is the voltage at the output node. With a negative feedback configuration, the op amp drives its output voltage to whatever is required to make its input terminals' voltages equal. (Or pretty nearly equal). So its output is modeled as an "ideal voltage source", powered by magic unlimited current, so KCL is left with an unknowable unknown.
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| Dec 6, 2015 at 21:19 | review | Close votes | |||
| Dec 15, 2015 at 5:02 | |||||
| Dec 6, 2015 at 19:29 | comment | added | Autistic | Understand the virtual earth | |
| Dec 6, 2015 at 18:57 | comment | added | John D | Replace the op amp with a suitable model, like a voltage-controlled voltage source for example, and proceed from there. If you need to model frequency response add suitable RC pole, etc. | |
| Dec 6, 2015 at 15:56 | review | First posts | |||
| Dec 6, 2015 at 19:29 | |||||
| Dec 6, 2015 at 15:56 | history | asked | craaaft | CC BY-SA 3.0 |