Impact of using too less substrate tap

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diarmuid

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Hello All,

I am laying out a bandgap. Apart from latch-up, what is the impact of uisng too less substrate tap?

Thanks,

Diarmuid
 

Increase of noise comming from sub, if there's block injecting a lot of charge into sub - substrate voltage shift and so on
 

jirika said:
Increase of noise comming from sub, if there's block injecting a lot of charge into sub - substrate voltage shift and so on
Click to expand...

For this reason you should make a guard ring out of your substrate taps, ideally around each individual BJT as well to catch injected minority carriers.
 

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