voltage source independant current source

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a.zar

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Hi,

I am looking for a CMOS current source that provides constant current while its voltage source changes between 0.7V to 2V. Any help would be so much appericiated!
 

Use deplete NMOS.
 

I don't have access to deplet nmos. I am new to analog design, is there any specific schematic that I can use?

Thanks.
 

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