[BASIC question] what is the component I should use to fix an AC voltage and its current (in the same component)

[Anastacia]

I need urgently to know how use a component which allows me to fix an AC voltage and its current.

I can't use a resistance and an AC current in parallele for my application..

Thanks a lot you will be very helpful !

[johnsold]

In general the way to fix both voltage and current requires a source and an impedance, but you say you do not want that solution.

Please tell us exactly what your application is and why a current source in parallel with a resistance is unacceptable.

Lynn