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As shown blw,can i use a differential amplifier as regulator

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tomato

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pls give me some comments~~
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thanks....
 

Hi
No because as you see in pic, Vout=-Vin.Rf/Rg
so, Vout is function of Vin
in regulator we don't want that Vout be function of Vin.
regards
 

hi~hr_rezaee

If Vref is fixed like Bandgap ref. and then Driving Tr. in Opamp use pass tr. as PMOS.
is it possible?
 

Hi
I can't understand what you say.
but If you use a bandgap as input, this circuit will be just a buffer nor regulator.
regards
 

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