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SOI bandgap reference-designing a bandgap reference ciruit

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newmedia

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soi bandgap

Hello all,

I'm trying to design a bandgap reference circuit. I know I have to use diodes instead of bjts. Except that I don't know much about the designing a bandgap reference ciruit.

Any of you have a theis or disseration about designing a bandgap reference circuit for PD SOI? I want to know how the circuits are sized, so if you can point out a paper or thesis which talk about the ciruit in detail.

Thank you,
newmedia
 

Re: SOI bandgap reference-designing a bandgap reference ciru

Hello all,

I realized this is a very stupid question. If you use body contacted SOI devices, it almost identical to have bulk CMOS devices.

I hope this information helps other guys.
 

If you have PDSOI then you do have BJTs available, they are
just lateral and may not be modeled. But if you have a BTS structure
(body tied to source) then when you stand it on its head,
body tied to drain, that device is also a C-B transdiode with likely
better linearity than your designed diodes. The downside
in my particular SOI technology is defectivity - 90% of the diodes
have one I-V curve, and the others scatter from it. So bandgap
yield would be compromised. We see better uniformity,
though poorer diode ideality across the current range, from
"real" diodes.

You basically just have to get all your gain, and no great offset,
from an explicit CMOS amplifier, is all.
 

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