current transmitter circuits

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eswaramoorthykv

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Dear Friends,
I need different types of current transmitter circuits (4-20mA) using op-amp.Thanks in Advance.

Eswaramoorthy K V
 

Since there are numerous current-loop interface ICs
already, why would you want to implement the
standard using loose components? Just homework?
 

why cant you make a circuit which gives two current? to get that ,make one switch so that need not to go for two circuits..
 

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