@Felthry Wait what? *blinks, earfocuses*
@IceWolf well, an ideal resistor has a voltage across it that is equal to its resistance times the current through it. Thus, it takes a current as input and produces a voltage as output, though its output characteristics are pretty terrible so proper I-to-V converters tend to use an in-amp as well to increase input impedance and decrease output impedance, and to level-shift if necessary.
@IceWolf (it actually is fun though since you can use the nonlinearity to produce a magnetic amplifer that uses nothing but a ferrite core and some wires, you can control the amplitude of a high-frequency signal on one winding by applying a low-frequency signal on another winding that's just enough to partially saturate the core)