Nope! You could get 0-1 mA or 0-20 mA but getting 4 of anything from 0 volts isn't happening. Naturally, loading a 0 - 10 volt supply with 10,000 or 500 ohms, would get you 0-1mA and 0-20mA respectively. That isn't how it's done in the real world because they need to look into varying load resistances and deal with the resistance of the connecting wires. You need an active output to be able to drive the output voltage higher as load resistance increases, to get the same current out for a given voltage in.
Now I have personally fed a device with a 4-20 mA OP into a SCADA analog input looking for 0-1mA with a 1000 ohm burden resistance. This was done by a combination of parallel resistance and computer programming.
At least, voltage to current is easy to do WITH an op-amp. If you give up on the passives and want to try a circuit, or explain your source and load specifics, we can solve it.
Joe
