Circuit of two-wire system current transmitter

The utility model relates to the technical field of current transmitters, in particular to a circuit of a two-wire system current transmitter. Which comprises a main chip and is characterized in that a first pin of the main chip is connected with one end of a resistor zero, a fourth port of a first inductor and one end of a second capacitor, a second pin of the main chip is connected with the other end of the resistor zero and a collector electrode of a first triode, and a third pin of the main chip is connected with a base electrode of the first triode. A fourth pin of the main chip is connected with a fourth port of the connector clip and one end of a second resistor, the other end of the second resistor is connected with one end of a fifth resistor, a first port of a first adjustable resistor, a second port of the first adjustable resistor and a first grounding end, the other end of the fifth resistor is connected with a cathode of a second diode, and an anode of the second diode is connected with an emitt