How to setup bias for nwell?

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hg81

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How to setup bias for nwell ?

Please help me to find out how to setup the bias for nwell in P+ pinned nwell.

P+ layer and PSUB are all connected to GND? but how to connect nwell?

Please give me any ideas you will suggest.

Many thanks
 

Re: How to setup bias for nwell ?

Occasionally you will see NWell actively driven (for
example, in stacked / cascode circuits where a Vdd-
tied well would produce too much body-effect increase
in local effective VT). Often tied to the source in this
case. The excess capacitance, leakage, noise may be
issues depending on the circuit & layout; tradeoffs
against the VT improvement (or not-worsening).
 

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