Amplification interface, and corresponding measurement system and method for calibrating an amplification interface

An electronic device, comprising:

• a sensor having a first current input terminal coupled to a first node to receive a first bias current, a second current input terminal coupled to a second node to receive a second bias current, and a current output terminal coupled to a third node;
• wherein the sensor comprises first and second transistors forming an amplifier having a voltage offset, the first transistor having a drain coupled to the first node, a source coupled to the third node, and a gate, the second transistor having a drain coupled to the second node, a source coupled to the third node, and a gate coupled to the gate of the first transistor;
• a current generator configured to apply correction currents to the first and second nodes that compensate for the voltage offset;
• a tail transistor having a first conduction terminal coupled to the third node, a second conduction terminal coupled to a reference voltage, and a control terminal;
• a control circuit configured to generate a control signal applied to the control terminal of the tail transistor based upon voltages at the first and second nodes;
• and
• a differential current integrator comprising a first input terminal coupled to the second node and a second input terminal coupled to the first node.