Turn off NMOS while the source terminal is negative voltage?

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shaq

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Dear all,

How to turn off NMOS while the source terminal is negative voltage (around -0.7v)?

I have a idea that is to shift the negative voltage at the source terminal to the gate terminal in order to make Vgs=0, but I don't know how to do.

Anybody knows?
 

Re: Turn off NMOS while the source terminal is negative volt

Probably a level shifter is needed.
 

Re: Turn off NMOS while the source terminal is negative volt

yschuang said:
Probably a level shifter is needed.
Click to expand...

Dear yschuang,

What kind of level shifter can be used? A cross-couple type?

Plz give me a suggestion.
 

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