Bias_OK should go if HIGH the final current is in the range of +/-10 of its final val

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nannapaneni

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I am designing self biasing current source, I need to provide extra pin bias_ok such that Bias_OK should go if HIGH the final current is in the range of +/-10 of its final value. Can someone pls share idea how to add this pin.

My current is settling in 200us with some ringing and startup is off within 20us.
I am adding schematic for reference.
 

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