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| Created | March 06, 2013 |
| Last modified | March 08, 2013 |
| Tags | anatomy-of-opamp generic-opamp inside-opamp internal-circuit-of-opamp internal-opamp opamp opamp-basic opamp-internal-circuit |
This is the generic internal circuit of an OpAmp with full details. Hope everybody will be benefited. Comment if you have any suggestion, concern and questions.
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Nice idea. You should make it clear that this is a generic opamp just to demonstrate the main building blocks and not any particular one. Some minor points. 1) Don't use the triangular ground symbol for a positive supply rail. It just confuses everyone. 2) Q12 is not a current source. It is a diode connected transistor. It's just a diode. And no, it doesn't properly cancel out any temperature drifts. Not sure why you've drawn it. 3) Q11 & Q8 do form a current mirror. Q15 & Q16 are slaved off it to provide multiple current sinks. 4) R2 is only 100R: that's a lot of current going into those mirrors ... Now you can have even more fun trying to get it to simulate! :) |
March 06, 2013 |
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