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Bandgap voltage reference problems

favero over 12 years ago

Hello!

I'm trying to make this band-gap ref. circuit to work but, up to now, i haven't reached the right result.

I've already checked the circuit, but i couldn't find any misconnections on it.

Can you guys please help me debugging it? I'm workin on it for about 2 week and no success... this is really stressing me out.

Thx for your patience.

Bandgap schematics Cheers,

Fávero

banand over 12 years ago

You are biasing the opamp current based on its output, that can lock up and cause startup issues. Also looking at voltage levels you are attempting a sub-1V, at lower BG voltages your curve will not be very flat.
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