I need a constant current source ckt which can source current in the range of 0.1 to 1mA, with +/-1% tolerance, with Vcc 3.3v(adsbygoogle = window.adsbygoogle || []).push({});

Any ideas?

I found this - http://www.ecircuitcenter.com/Circuits_Audio_Amp/BJT Current_Source/BJT_Current_Source.htm

But no info on tolerance.

What happens to Io with change in beta?

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# Constant current source

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