Current sensing circuit

A current sensing circuit, coupled to a sensing resistor, the current sensing circuit comprising:

• a filtering circuit, coupled to two terminals of the sensing resistor respectively;
• an amplifier having a first input terminal, a second input terminal and an output terminal, the second input terminal being coupled to the filtering circuit;
• a first resistor, coupled between the filtering circuit and the first input terminal of the amplifier;
• a first transistor, a control terminal of the first transistor being coupled to the output terminal of the amplifier, a first terminal of the first transistor being coupled to the first input terminal of the amplifier and a second terminal of the first transistor being grounded through a second resistor;
• and
• a second transistor, a control terminal of the second transistor being coupled to the output terminal of the amplifier, a first terminal of the second transistor being coupled to the second input terminal of the amplifier and a second terminal of the second transistor being grounded through a third resistor.