Static offset reduction in a current conveyor

A current sensing circuit configured to provide an indication of a load current provided to a load, the current sensing circuit comprising:

• a first resistance having a first end that is coupled to an input node;
• an input current source transistor configured to provide a bias current;
• an input gain transistor arranged in series with the input current source transistor such that the serial input gain transistor is traversed by the bias current, wherein a voltage level at the input node corresponds to the voltage drop across the input current source transistor and the input gain transistor;
• an intermediate gain transistor forming a first current mirror with the input gain transistor;
• an intermediate current source transistor arranged in series with the intermediate gain transistor such that a current through the intermediate current source transistor corresponds to a current through the intermediate gain transistor;
• an output current source transistor forming a second current mirror with the intermediate current source transistor;
• and
• an output gain transistor arranged in series with the output current source transistor such that a current through the output current source transistor corresponds to a current through the output gain transistor, and forming a third current mirror with the input gain transistor, wherein a voltage level at an output node corresponds to the voltage drop across the output current source transistor and the output gain transistor;
• wherein
• the first resistance provides a load current to a load arranged in parallel to the serial input gain transistor and input current source transistor;
• the current sensing circuit comprises an output transistor arranged in parallel to the serial output gain transistor and output current source transistor;
• and
• the current through the output transistor provides an indication of the load current.