actually i m using one VI Converter, output of this VI converter is Iout,
this Iout is connected to the output connector and i have to readback this same current to one IV converter without dividing the current, if i took directly readback from the same point current is divding, so i searched about this in net but i didnt get the solution if any one knows about this give me the solution.
can u send me the schematic for how to implement shunt with two buffer amplifier to sense the voltage across it in my block diagram....it is urgent for me sir...
---------- Post added at 11:20 ---------- Previous post was at 11:15 ----------
Sir,
actually i have to give 0-20mA to the field through Connector, if i tap this current and used for read back i wont get the required current at the field but i hav to read this current back without dividing...if i tap from output of VI converter there one branch will generate current will divide this should not happen.... any other way to readback the current from vi converter....
After adding a shunt, two buffers and a differential amplifier, the block diagram looks like this. You didn't refer to real circuits, so I did neither. Generally, an instrumentation amplifier is a promising candidate for the current sense circuit.