help on nested op-amp

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Yes. It's very odd.

Given Vcc is 12V. Then, voltage over R800 would be around 10.5V.

Also you got Ib>Ic is obvious - assuming you're talking about Q800. I'll guess you could solve this by adding a resistor in between vcc and Q850.
I haven't seen a current mirror like that before.
 

hi,
what is the magnitude of this resistor?
 

nanock said:
you've told:" I'll guess you could solve this by adding a resistor in between vcc and Q850."
so that?
Click to expand...
Problem is, I haven't seen that kind of curent mirror before so I would be a bit carefull to say it actually would work.

If it was up to me, I would have draw the whole current mirror from scratch.
 

Thanks for this post and I was also facing such problem.
 

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